./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ae007674 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-simple/dll2c_update_all_reverse.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 5247496942546516118f3c28fa350944e097bdf15ee64734ca287a29ad51a034 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 06:01:23,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 06:01:23,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 06:01:23,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 06:01:23,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 06:01:23,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 06:01:23,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 06:01:23,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 06:01:23,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 06:01:23,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 06:01:23,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 06:01:23,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 06:01:23,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 06:01:23,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 06:01:23,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 06:01:23,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 06:01:23,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 06:01:23,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 06:01:23,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 06:01:23,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 06:01:23,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 06:01:23,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 06:01:23,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 06:01:23,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 06:01:23,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 06:01:23,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 06:01:23,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 06:01:23,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 06:01:23,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 06:01:23,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 06:01:23,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 06:01:23,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 06:01:23,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 06:01:23,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 06:01:23,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 06:01:23,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 06:01:23,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 06:01:23,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 06:01:23,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 06:01:23,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 06:01:23,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 06:01:23,718 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 06:01:23,744 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 06:01:23,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 06:01:23,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 06:01:23,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 06:01:23,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 06:01:23,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 06:01:23,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 06:01:23,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 06:01:23,748 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 06:01:23,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 06:01:23,749 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 06:01:23,749 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 06:01:23,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 06:01:23,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 06:01:23,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 06:01:23,750 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 06:01:23,750 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 06:01:23,750 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 06:01:23,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 06:01:23,750 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 06:01:23,750 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 06:01:23,751 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 06:01:23,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 06:01:23,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 06:01:23,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 06:01:23,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 06:01:23,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 06:01:23,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 06:01:23,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 06:01:23,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 06:01:23,759 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5247496942546516118f3c28fa350944e097bdf15ee64734ca287a29ad51a034 [2021-12-28 06:01:24,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 06:01:24,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 06:01:24,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 06:01:24,027 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 06:01:24,028 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 06:01:24,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i [2021-12-28 06:01:24,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4551ea9ef/a226dc1bdef447ee98343b809bb81b74/FLAG28f50d695 [2021-12-28 06:01:24,511 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 06:01:24,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i [2021-12-28 06:01:24,527 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4551ea9ef/a226dc1bdef447ee98343b809bb81b74/FLAG28f50d695 [2021-12-28 06:01:24,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4551ea9ef/a226dc1bdef447ee98343b809bb81b74 [2021-12-28 06:01:24,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 06:01:24,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 06:01:24,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 06:01:24,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 06:01:24,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 06:01:24,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 06:01:24" (1/1) ... [2021-12-28 06:01:24,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@186e66da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:24, skipping insertion in model container [2021-12-28 06:01:24,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 06:01:24" (1/1) ... [2021-12-28 06:01:24,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 06:01:24,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 06:01:24,811 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-simple/dll2c_update_all_reverse.i[24556,24569] [2021-12-28 06:01:24,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 06:01:24,818 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 06:01:24,842 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-simple/dll2c_update_all_reverse.i[24556,24569] [2021-12-28 06:01:24,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 06:01:24,870 INFO L208 MainTranslator]: Completed translation [2021-12-28 06:01:24,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:24 WrapperNode [2021-12-28 06:01:24,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 06:01:24,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 06:01:24,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 06:01:24,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 06:01:24,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:24" (1/1) ... [2021-12-28 06:01:24,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:24" (1/1) ... [2021-12-28 06:01:24,930 INFO L137 Inliner]: procedures = 126, calls = 29, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 137 [2021-12-28 06:01:24,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 06:01:24,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 06:01:24,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 06:01:24,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 06:01:24,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:24" (1/1) ... [2021-12-28 06:01:24,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:24" (1/1) ... [2021-12-28 06:01:24,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:24" (1/1) ... [2021-12-28 06:01:24,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:24" (1/1) ... [2021-12-28 06:01:24,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:24" (1/1) ... [2021-12-28 06:01:24,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:24" (1/1) ... [2021-12-28 06:01:24,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:24" (1/1) ... [2021-12-28 06:01:24,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 06:01:24,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 06:01:24,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 06:01:24,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 06:01:24,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:24" (1/1) ... [2021-12-28 06:01:24,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 06:01:24,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:25,008 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) [2021-12-28 06:01:25,049 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 [2021-12-28 06:01:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 06:01:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 06:01:25,062 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-28 06:01:25,062 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-28 06:01:25,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 06:01:25,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 06:01:25,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 06:01:25,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 06:01:25,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 06:01:25,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 06:01:25,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 06:01:25,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 06:01:25,203 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 06:01:25,205 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 06:01:25,507 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 06:01:25,512 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 06:01:25,517 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-28 06:01:25,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 06:01:25 BoogieIcfgContainer [2021-12-28 06:01:25,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 06:01:25,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 06:01:25,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 06:01:25,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 06:01:25,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 06:01:24" (1/3) ... [2021-12-28 06:01:25,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2f0a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 06:01:25, skipping insertion in model container [2021-12-28 06:01:25,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 06:01:24" (2/3) ... [2021-12-28 06:01:25,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2f0a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 06:01:25, skipping insertion in model container [2021-12-28 06:01:25,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 06:01:25" (3/3) ... [2021-12-28 06:01:25,534 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_update_all_reverse.i [2021-12-28 06:01:25,538 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 06:01:25,542 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2021-12-28 06:01:25,581 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 06:01:25,590 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 [2021-12-28 06:01:25,590 INFO L340 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2021-12-28 06:01:25,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 89 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:25,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 06:01:25,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:25,620 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 06:01:25,621 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:25,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:25,626 INFO L85 PathProgramCache]: Analyzing trace with hash 894964530, now seen corresponding path program 1 times [2021-12-28 06:01:25,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:25,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355719817] [2021-12-28 06:01:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:25,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:25,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:25,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355719817] [2021-12-28 06:01:25,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355719817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:25,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:25,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 06:01:25,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396099922] [2021-12-28 06:01:25,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:25,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 06:01:25,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:25,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 06:01:25,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:01:25,797 INFO L87 Difference]: Start difference. First operand has 93 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 89 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 06:01:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:25,893 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2021-12-28 06:01:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 06:01:25,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 06:01:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:25,900 INFO L225 Difference]: With dead ends: 90 [2021-12-28 06:01:25,901 INFO L226 Difference]: Without dead ends: 87 [2021-12-28 06:01:25,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:01:25,907 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:25,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 147 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-28 06:01:25,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-28 06:01:25,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 83 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-12-28 06:01:25,946 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 6 [2021-12-28 06:01:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:25,946 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-12-28 06:01:25,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 06:01:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-12-28 06:01:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 06:01:25,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:25,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 06:01:25,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 06:01:25,949 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:25,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:25,950 INFO L85 PathProgramCache]: Analyzing trace with hash 894964531, now seen corresponding path program 1 times [2021-12-28 06:01:25,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:25,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695071215] [2021-12-28 06:01:25,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:25,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:26,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:26,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695071215] [2021-12-28 06:01:26,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695071215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:26,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:26,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 06:01:26,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971215217] [2021-12-28 06:01:26,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:26,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 06:01:26,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:26,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 06:01:26,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:01:26,012 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 06:01:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:26,067 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2021-12-28 06:01:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 06:01:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 06:01:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:26,068 INFO L225 Difference]: With dead ends: 84 [2021-12-28 06:01:26,068 INFO L226 Difference]: Without dead ends: 84 [2021-12-28 06:01:26,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 06:01:26,070 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 5 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:26,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 149 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 06:01:26,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-28 06:01:26,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-28 06:01:26,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 80 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-12-28 06:01:26,075 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 6 [2021-12-28 06:01:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:26,076 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-12-28 06:01:26,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 06:01:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-12-28 06:01:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-28 06:01:26,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:26,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:26,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 06:01:26,077 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1046244471, now seen corresponding path program 1 times [2021-12-28 06:01:26,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:26,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906262209] [2021-12-28 06:01:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:26,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:26,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:26,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:26,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906262209] [2021-12-28 06:01:26,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906262209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:26,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:26,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 06:01:26,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359359969] [2021-12-28 06:01:26,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:26,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 06:01:26,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:26,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 06:01:26,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 06:01:26,170 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 06:01:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:26,241 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2021-12-28 06:01:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 06:01:26,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-28 06:01:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:26,243 INFO L225 Difference]: With dead ends: 95 [2021-12-28 06:01:26,243 INFO L226 Difference]: Without dead ends: 95 [2021-12-28 06:01:26,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 06:01:26,244 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:26,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 223 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-28 06:01:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2021-12-28 06:01:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 81 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2021-12-28 06:01:26,251 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 14 [2021-12-28 06:01:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:26,251 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2021-12-28 06:01:26,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 06:01:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2021-12-28 06:01:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-28 06:01:26,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:26,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:26,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 06:01:26,253 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:26,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:26,253 INFO L85 PathProgramCache]: Analyzing trace with hash 543084160, now seen corresponding path program 1 times [2021-12-28 06:01:26,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:26,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826742506] [2021-12-28 06:01:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:26,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:26,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:26,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-28 06:01:26,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:26,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826742506] [2021-12-28 06:01:26,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826742506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:26,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:26,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 06:01:26,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657777150] [2021-12-28 06:01:26,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:26,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 06:01:26,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:26,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 06:01:26,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:01:26,402 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:26,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:26,550 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-12-28 06:01:26,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:26,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-28 06:01:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:26,555 INFO L225 Difference]: With dead ends: 105 [2021-12-28 06:01:26,555 INFO L226 Difference]: Without dead ends: 105 [2021-12-28 06:01:26,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 06:01:26,565 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 77 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:26,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 286 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-28 06:01:26,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2021-12-28 06:01:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.6296296296296295) internal successors, (88), 80 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:26,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-12-28 06:01:26,584 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 24 [2021-12-28 06:01:26,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:26,585 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-12-28 06:01:26,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:26,585 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-12-28 06:01:26,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-28 06:01:26,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:26,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:26,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 06:01:26,585 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:26,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:26,586 INFO L85 PathProgramCache]: Analyzing trace with hash 543084161, now seen corresponding path program 1 times [2021-12-28 06:01:26,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:26,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749432800] [2021-12-28 06:01:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:26,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:26,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:26,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:26,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:26,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749432800] [2021-12-28 06:01:26,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749432800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:26,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:26,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 06:01:26,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855219210] [2021-12-28 06:01:26,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:26,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 06:01:26,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:26,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 06:01:26,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:01:26,707 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:26,833 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2021-12-28 06:01:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:26,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-28 06:01:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:26,835 INFO L225 Difference]: With dead ends: 84 [2021-12-28 06:01:26,835 INFO L226 Difference]: Without dead ends: 84 [2021-12-28 06:01:26,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 06:01:26,836 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 77 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:26,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 295 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:26,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-28 06:01:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-12-28 06:01:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 79 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-12-28 06:01:26,841 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 24 [2021-12-28 06:01:26,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:26,841 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-12-28 06:01:26,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:26,842 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-12-28 06:01:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 06:01:26,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:26,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:26,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 06:01:26,843 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:26,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:26,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2082132639, now seen corresponding path program 1 times [2021-12-28 06:01:26,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:26,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718408547] [2021-12-28 06:01:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:26,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:26,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:26,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:26,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:26,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718408547] [2021-12-28 06:01:26,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718408547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:26,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988906183] [2021-12-28 06:01:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:26,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:26,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:26,996 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) [2021-12-28 06:01:26,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 06:01:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:27,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 06:01:27,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:27,144 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 [2021-12-28 06:01:27,357 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-28 06:01:27,357 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 [2021-12-28 06:01:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:27,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:27,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988906183] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:27,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:01:27,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-12-28 06:01:27,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933916807] [2021-12-28 06:01:27,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:27,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 06:01:27,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:27,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 06:01:27,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-28 06:01:27,440 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:27,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:27,622 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2021-12-28 06:01:27,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:27,623 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-12-28 06:01:27,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:27,624 INFO L225 Difference]: With dead ends: 110 [2021-12-28 06:01:27,624 INFO L226 Difference]: Without dead ends: 110 [2021-12-28 06:01:27,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-28 06:01:27,625 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 69 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:27,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 420 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 284 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2021-12-28 06:01:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-28 06:01:27,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 88. [2021-12-28 06:01:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.603448275862069) internal successors, (93), 83 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2021-12-28 06:01:27,643 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 26 [2021-12-28 06:01:27,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:27,643 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2021-12-28 06:01:27,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2021-12-28 06:01:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 06:01:27,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:27,644 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:27,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:27,860 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 [2021-12-28 06:01:27,861 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:27,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:27,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2082132638, now seen corresponding path program 1 times [2021-12-28 06:01:27,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:27,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229211295] [2021-12-28 06:01:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:27,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:27,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:28,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:28,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:28,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229211295] [2021-12-28 06:01:28,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229211295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:28,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81760495] [2021-12-28 06:01:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:28,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:28,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:28,106 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) [2021-12-28 06:01:28,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 06:01:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:28,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-28 06:01:28,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:28,216 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 [2021-12-28 06:01:28,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:28,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2021-12-28 06:01:28,447 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 06:01:28,447 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 [2021-12-28 06:01:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:28,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:28,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81760495] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:28,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:01:28,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-12-28 06:01:28,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167420719] [2021-12-28 06:01:28,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:28,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-28 06:01:28,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:28,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-28 06:01:28,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-12-28 06:01:28,573 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 06:01:28,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:28,824 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2021-12-28 06:01:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 06:01:28,825 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2021-12-28 06:01:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:28,825 INFO L225 Difference]: With dead ends: 90 [2021-12-28 06:01:28,826 INFO L226 Difference]: Without dead ends: 90 [2021-12-28 06:01:28,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-12-28 06:01:28,826 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 25 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:28,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 690 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 465 Invalid, 0 Unknown, 2 Unchecked, 0.2s Time] [2021-12-28 06:01:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-28 06:01:28,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2021-12-28 06:01:28,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 83 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-12-28 06:01:28,830 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 26 [2021-12-28 06:01:28,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:28,830 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-12-28 06:01:28,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 06:01:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-12-28 06:01:28,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-28 06:01:28,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:28,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:28,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:29,031 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,SelfDestructingSolverStorable6 [2021-12-28 06:01:29,031 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:29,032 INFO L85 PathProgramCache]: Analyzing trace with hash 525447991, now seen corresponding path program 1 times [2021-12-28 06:01:29,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:29,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137612506] [2021-12-28 06:01:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:29,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:29,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:29,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:29,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:29,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137612506] [2021-12-28 06:01:29,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137612506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:29,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23597972] [2021-12-28 06:01:29,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:29,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:29,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:29,171 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) [2021-12-28 06:01:29,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 06:01:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:29,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 06:01:29,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:29,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:29,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23597972] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 06:01:29,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 06:01:29,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2021-12-28 06:01:29,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648986096] [2021-12-28 06:01:29,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:29,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 06:01:29,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:29,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 06:01:29,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:01:29,416 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:29,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:29,495 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2021-12-28 06:01:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:29,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-28 06:01:29,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:29,496 INFO L225 Difference]: With dead ends: 89 [2021-12-28 06:01:29,496 INFO L226 Difference]: Without dead ends: 89 [2021-12-28 06:01:29,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 06:01:29,497 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:29,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 436 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:29,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-28 06:01:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-12-28 06:01:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.5689655172413792) internal successors, (91), 83 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:29,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2021-12-28 06:01:29,500 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 28 [2021-12-28 06:01:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:29,500 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2021-12-28 06:01:29,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2021-12-28 06:01:29,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 06:01:29,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:29,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:29,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:29,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:29,716 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:29,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:29,716 INFO L85 PathProgramCache]: Analyzing trace with hash -895762126, now seen corresponding path program 1 times [2021-12-28 06:01:29,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:29,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139097556] [2021-12-28 06:01:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:29,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:29,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:29,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 06:01:29,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:29,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139097556] [2021-12-28 06:01:29,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139097556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:29,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175511916] [2021-12-28 06:01:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:29,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:29,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:29,778 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) [2021-12-28 06:01:29,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 06:01:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:29,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 06:01:29,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 06:01:29,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:29,920 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-28 06:01:29,920 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 12 treesize of output 11 [2021-12-28 06:01:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 06:01:29,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175511916] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 06:01:29,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 06:01:29,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2021-12-28 06:01:29,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576492412] [2021-12-28 06:01:29,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:29,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 06:01:29,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:29,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 06:01:29,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:01:29,960 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:30,053 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2021-12-28 06:01:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-12-28 06:01:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:30,054 INFO L225 Difference]: With dead ends: 113 [2021-12-28 06:01:30,054 INFO L226 Difference]: Without dead ends: 113 [2021-12-28 06:01:30,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-28 06:01:30,056 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 125 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:30,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 209 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:30,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-28 06:01:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 91. [2021-12-28 06:01:30,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 86 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2021-12-28 06:01:30,069 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 29 [2021-12-28 06:01:30,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:30,070 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2021-12-28 06:01:30,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2021-12-28 06:01:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 06:01:30,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:30,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:30,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:30,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:30,287 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:30,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:30,288 INFO L85 PathProgramCache]: Analyzing trace with hash -895762125, now seen corresponding path program 1 times [2021-12-28 06:01:30,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:30,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347088750] [2021-12-28 06:01:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:30,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:30,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:30,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:30,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:30,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347088750] [2021-12-28 06:01:30,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347088750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:30,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671056793] [2021-12-28 06:01:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:30,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:30,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:30,399 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) [2021-12-28 06:01:30,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 06:01:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:30,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 06:01:30,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:30,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:30,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 06:01:30,644 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 20 treesize of output 24 [2021-12-28 06:01:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:30,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671056793] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 06:01:30,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 06:01:30,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2021-12-28 06:01:30,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385928591] [2021-12-28 06:01:30,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:30,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 06:01:30,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 06:01:30,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-12-28 06:01:30,752 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-28 06:01:30,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:30,935 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2021-12-28 06:01:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 06:01:30,935 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2021-12-28 06:01:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:30,936 INFO L225 Difference]: With dead ends: 150 [2021-12-28 06:01:30,936 INFO L226 Difference]: Without dead ends: 150 [2021-12-28 06:01:30,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-12-28 06:01:30,937 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 200 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:30,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 752 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 06:01:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-28 06:01:30,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 91. [2021-12-28 06:01:30,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 86 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2021-12-28 06:01:30,939 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 29 [2021-12-28 06:01:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:30,940 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2021-12-28 06:01:30,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-28 06:01:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2021-12-28 06:01:30,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 06:01:30,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:30,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:30,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-28 06:01:31,140 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,SelfDestructingSolverStorable9 [2021-12-28 06:01:31,141 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:31,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:31,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1998822125, now seen corresponding path program 1 times [2021-12-28 06:01:31,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:31,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848460805] [2021-12-28 06:01:31,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:31,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:31,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:31,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-28 06:01:31,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:31,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848460805] [2021-12-28 06:01:31,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848460805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:31,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:31,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 06:01:31,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576285251] [2021-12-28 06:01:31,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:31,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 06:01:31,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:31,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 06:01:31,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 06:01:31,219 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:31,341 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-12-28 06:01:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 06:01:31,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-28 06:01:31,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:31,342 INFO L225 Difference]: With dead ends: 111 [2021-12-28 06:01:31,342 INFO L226 Difference]: Without dead ends: 111 [2021-12-28 06:01:31,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 06:01:31,343 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 135 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:31,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 294 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-28 06:01:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 90. [2021-12-28 06:01:31,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.540983606557377) internal successors, (94), 85 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2021-12-28 06:01:31,346 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 30 [2021-12-28 06:01:31,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:31,346 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2021-12-28 06:01:31,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2021-12-28 06:01:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 06:01:31,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:31,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:31,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 06:01:31,347 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:31,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1998822124, now seen corresponding path program 1 times [2021-12-28 06:01:31,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:31,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947119733] [2021-12-28 06:01:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:31,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:31,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:31,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:31,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:31,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947119733] [2021-12-28 06:01:31,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947119733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:31,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:31,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 06:01:31,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597506575] [2021-12-28 06:01:31,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:31,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 06:01:31,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:31,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 06:01:31,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 06:01:31,432 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:31,545 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-12-28 06:01:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 06:01:31,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-28 06:01:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:31,546 INFO L225 Difference]: With dead ends: 89 [2021-12-28 06:01:31,546 INFO L226 Difference]: Without dead ends: 89 [2021-12-28 06:01:31,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 06:01:31,547 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 136 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:31,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 290 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:31,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-28 06:01:31,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-28 06:01:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 84 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-12-28 06:01:31,549 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 30 [2021-12-28 06:01:31,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:31,549 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-12-28 06:01:31,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-12-28 06:01:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 06:01:31,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:31,550 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:31,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 06:01:31,550 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:31,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:31,550 INFO L85 PathProgramCache]: Analyzing trace with hash 452746567, now seen corresponding path program 1 times [2021-12-28 06:01:31,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:31,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858150706] [2021-12-28 06:01:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:31,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:31,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:31,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-28 06:01:31,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:31,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858150706] [2021-12-28 06:01:31,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858150706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:31,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:31,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 06:01:31,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335816029] [2021-12-28 06:01:31,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:31,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 06:01:31,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:31,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 06:01:31,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-28 06:01:31,657 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:31,888 INFO L93 Difference]: Finished difference Result 158 states and 173 transitions. [2021-12-28 06:01:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 06:01:31,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2021-12-28 06:01:31,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:31,889 INFO L225 Difference]: With dead ends: 158 [2021-12-28 06:01:31,889 INFO L226 Difference]: Without dead ends: 158 [2021-12-28 06:01:31,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-28 06:01:31,890 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 320 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:31,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 509 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 06:01:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-28 06:01:31,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 92. [2021-12-28 06:01:31,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.546875) internal successors, (99), 87 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2021-12-28 06:01:31,892 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 35 [2021-12-28 06:01:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:31,892 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2021-12-28 06:01:31,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:31,892 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2021-12-28 06:01:31,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 06:01:31,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:31,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:31,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 06:01:31,894 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:31,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:31,895 INFO L85 PathProgramCache]: Analyzing trace with hash 452746568, now seen corresponding path program 1 times [2021-12-28 06:01:31,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:31,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406838571] [2021-12-28 06:01:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:31,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:31,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:31,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 06:01:31,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:31,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406838571] [2021-12-28 06:01:31,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406838571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:31,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:31,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 06:01:31,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457720595] [2021-12-28 06:01:31,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:31,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 06:01:31,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:31,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 06:01:31,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:01:31,977 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:32,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:32,052 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2021-12-28 06:01:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:32,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2021-12-28 06:01:32,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:32,054 INFO L225 Difference]: With dead ends: 120 [2021-12-28 06:01:32,054 INFO L226 Difference]: Without dead ends: 120 [2021-12-28 06:01:32,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-28 06:01:32,055 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 122 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:32,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 270 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:32,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-28 06:01:32,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2021-12-28 06:01:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 90 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2021-12-28 06:01:32,057 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 35 [2021-12-28 06:01:32,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:32,057 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2021-12-28 06:01:32,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:32,058 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2021-12-28 06:01:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 06:01:32,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:32,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:32,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 06:01:32,059 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:32,059 INFO L85 PathProgramCache]: Analyzing trace with hash 452746623, now seen corresponding path program 1 times [2021-12-28 06:01:32,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:32,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687149398] [2021-12-28 06:01:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:32,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:32,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:32,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:32,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:32,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687149398] [2021-12-28 06:01:32,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687149398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:32,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:32,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 06:01:32,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352888965] [2021-12-28 06:01:32,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:32,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 06:01:32,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:32,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 06:01:32,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-28 06:01:32,193 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:32,443 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2021-12-28 06:01:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 06:01:32,444 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2021-12-28 06:01:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:32,445 INFO L225 Difference]: With dead ends: 142 [2021-12-28 06:01:32,445 INFO L226 Difference]: Without dead ends: 142 [2021-12-28 06:01:32,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-28 06:01:32,445 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 315 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:32,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 530 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 06:01:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-28 06:01:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 95. [2021-12-28 06:01:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.492537313432836) internal successors, (100), 90 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-12-28 06:01:32,448 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 35 [2021-12-28 06:01:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:32,448 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-12-28 06:01:32,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-12-28 06:01:32,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-28 06:01:32,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:32,449 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:32,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 06:01:32,449 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:32,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1577337163, now seen corresponding path program 1 times [2021-12-28 06:01:32,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:32,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262928407] [2021-12-28 06:01:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:32,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:32,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:32,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:32,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:32,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262928407] [2021-12-28 06:01:32,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262928407] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:32,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053708269] [2021-12-28 06:01:32,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:32,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:32,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:32,720 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) [2021-12-28 06:01:32,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 06:01:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:32,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-28 06:01:32,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:32,879 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 [2021-12-28 06:01:32,962 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 06:01:32,962 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 [2021-12-28 06:01:33,011 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 [2021-12-28 06:01:33,058 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 06:01:33,059 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 26 treesize of output 27 [2021-12-28 06:01:33,103 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 06:01:33,103 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 [2021-12-28 06:01:33,141 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-28 06:01:33,142 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 26 [2021-12-28 06:01:33,223 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 25 treesize of output 13 [2021-12-28 06:01:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:33,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:33,277 INFO L353 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2021-12-28 06:01:33,278 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 19 treesize of output 18 [2021-12-28 06:01:33,281 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1579 (Array Int Int))) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_1579) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2021-12-28 06:01:33,305 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1579 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_1579) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) is different from false [2021-12-28 06:01:33,310 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1579 (Array Int Int)) (v_ArrVal_1578 (Array Int Int))) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_1578) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_1579) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) is different from false [2021-12-28 06:01:33,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 06:01:33,317 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 21 treesize of output 22 [2021-12-28 06:01:33,319 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 60 treesize of output 52 [2021-12-28 06:01:33,322 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 24 treesize of output 22 [2021-12-28 06:01:33,323 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 46 treesize of output 42 [2021-12-28 06:01:33,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053708269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:33,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:01:33,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 31 [2021-12-28 06:01:33,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534316181] [2021-12-28 06:01:33,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:33,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-28 06:01:33,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:33,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-28 06:01:33,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=980, Unknown=3, NotChecked=192, Total=1260 [2021-12-28 06:01:33,418 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:34,123 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2021-12-28 06:01:34,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 06:01:34,123 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2021-12-28 06:01:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:34,125 INFO L225 Difference]: With dead ends: 136 [2021-12-28 06:01:34,125 INFO L226 Difference]: Without dead ends: 136 [2021-12-28 06:01:34,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=1610, Unknown=3, NotChecked=252, Total=2070 [2021-12-28 06:01:34,126 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 211 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:34,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1226 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 06:01:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-28 06:01:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2021-12-28 06:01:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.4675324675324675) internal successors, (113), 100 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2021-12-28 06:01:34,129 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 38 [2021-12-28 06:01:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:34,129 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2021-12-28 06:01:34,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:34,129 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2021-12-28 06:01:34,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-28 06:01:34,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:34,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:34,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:34,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-28 06:01:34,339 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:34,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:34,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1577337164, now seen corresponding path program 1 times [2021-12-28 06:01:34,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:34,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938136726] [2021-12-28 06:01:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:34,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:34,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:34,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:34,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:34,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938136726] [2021-12-28 06:01:34,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938136726] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:34,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862422082] [2021-12-28 06:01:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:34,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:34,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:34,727 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) [2021-12-28 06:01:34,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 06:01:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:34,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-28 06:01:34,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:34,881 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 [2021-12-28 06:01:34,885 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 [2021-12-28 06:01:35,159 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 06:01:35,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-28 06:01:35,180 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 06:01:35,180 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 [2021-12-28 06:01:35,282 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 [2021-12-28 06:01:35,289 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 [2021-12-28 06:01:35,356 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 06:01:35,357 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 45 treesize of output 42 [2021-12-28 06:01:35,361 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 18 treesize of output 20 [2021-12-28 06:01:35,464 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 06:01:35,464 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 [2021-12-28 06:01:35,468 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 [2021-12-28 06:01:35,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:35,508 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 31 treesize of output 26 [2021-12-28 06:01:35,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:35,514 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 [2021-12-28 06:01:35,646 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 25 treesize of output 13 [2021-12-28 06:01:35,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-12-28 06:01:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 06:01:35,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:36,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 06:01:36,315 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 43 treesize of output 44 [2021-12-28 06:01:36,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 06:01:36,320 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 35 treesize of output 36 [2021-12-28 06:01:36,323 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 116 treesize of output 108 [2021-12-28 06:01:36,342 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 334 treesize of output 314 [2021-12-28 06:01:36,352 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 158 treesize of output 150 [2021-12-28 06:01:36,359 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 302 treesize of output 286 [2021-12-28 06:01:36,362 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 286 treesize of output 270 [2021-12-28 06:01:36,369 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 270 treesize of output 262 [2021-12-28 06:01:36,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 06:01:36,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 06:01:36,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 06:01:36,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 06:01:36,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 18 treesize of output 10 [2021-12-28 06:01:36,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862422082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:36,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:01:36,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 39 [2021-12-28 06:01:36,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750550133] [2021-12-28 06:01:36,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:36,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-28 06:01:36,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:36,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-28 06:01:36,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2507, Unknown=3, NotChecked=0, Total=2652 [2021-12-28 06:01:36,846 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 40 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 06:01:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:38,575 INFO L93 Difference]: Finished difference Result 216 states and 240 transitions. [2021-12-28 06:01:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 06:01:38,576 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-12-28 06:01:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:38,577 INFO L225 Difference]: With dead ends: 216 [2021-12-28 06:01:38,577 INFO L226 Difference]: Without dead ends: 216 [2021-12-28 06:01:38,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=351, Invalid=3936, Unknown=3, NotChecked=0, Total=4290 [2021-12-28 06:01:38,578 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 1178 mSDsluCounter, 2318 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 2417 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:38,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 2417 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1672 Invalid, 0 Unknown, 107 Unchecked, 0.8s Time] [2021-12-28 06:01:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-28 06:01:38,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 113. [2021-12-28 06:01:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 85 states have (on average 1.4588235294117646) internal successors, (124), 108 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 06:01:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2021-12-28 06:01:38,585 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 38 [2021-12-28 06:01:38,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:38,585 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2021-12-28 06:01:38,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 06:01:38,586 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2021-12-28 06:01:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 06:01:38,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:38,587 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:38,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:38,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:38,797 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:38,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:38,798 INFO L85 PathProgramCache]: Analyzing trace with hash -511950436, now seen corresponding path program 1 times [2021-12-28 06:01:38,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:38,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143893415] [2021-12-28 06:01:38,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:38,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:38,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:38,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:38,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-28 06:01:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 06:01:38,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:38,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143893415] [2021-12-28 06:01:38,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143893415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:38,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604102836] [2021-12-28 06:01:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:38,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:38,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:38,896 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) [2021-12-28 06:01:38,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 06:01:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:39,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 06:01:39,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 06:01:39,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 06:01:39,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604102836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:39,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 06:01:39,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-12-28 06:01:39,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5876312] [2021-12-28 06:01:39,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:39,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 06:01:39,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:39,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 06:01:39,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:01:39,110 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:39,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:39,117 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2021-12-28 06:01:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 06:01:39,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-12-28 06:01:39,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:39,118 INFO L225 Difference]: With dead ends: 96 [2021-12-28 06:01:39,119 INFO L226 Difference]: Without dead ends: 96 [2021-12-28 06:01:39,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:01:39,119 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 126 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:39,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 95 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 06:01:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-28 06:01:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-28 06:01:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 92 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:39,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2021-12-28 06:01:39,121 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 41 [2021-12-28 06:01:39,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:39,122 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2021-12-28 06:01:39,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 06:01:39,122 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2021-12-28 06:01:39,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 06:01:39,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:39,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:39,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:39,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-28 06:01:39,341 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash -784093497, now seen corresponding path program 2 times [2021-12-28 06:01:39,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:39,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105564354] [2021-12-28 06:01:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:39,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:39,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:39,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 06:01:39,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:39,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105564354] [2021-12-28 06:01:39,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105564354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:39,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:39,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 06:01:39,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067158764] [2021-12-28 06:01:39,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:39,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 06:01:39,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:39,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 06:01:39,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 06:01:39,401 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:39,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:39,458 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-12-28 06:01:39,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:39,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2021-12-28 06:01:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:39,459 INFO L225 Difference]: With dead ends: 82 [2021-12-28 06:01:39,459 INFO L226 Difference]: Without dead ends: 82 [2021-12-28 06:01:39,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-28 06:01:39,460 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 101 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:39,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 181 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 06:01:39,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-28 06:01:39,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-12-28 06:01:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 78 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2021-12-28 06:01:39,462 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 41 [2021-12-28 06:01:39,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:39,463 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2021-12-28 06:01:39,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:39,463 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2021-12-28 06:01:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 06:01:39,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:39,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:39,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 06:01:39,464 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2032584715, now seen corresponding path program 1 times [2021-12-28 06:01:39,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:39,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25409002] [2021-12-28 06:01:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:39,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:39,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:39,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 06:01:39,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:39,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25409002] [2021-12-28 06:01:39,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25409002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:39,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:39,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 06:01:39,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855699675] [2021-12-28 06:01:39,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:39,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 06:01:39,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:39,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 06:01:39,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-28 06:01:39,543 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 11 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:39,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:39,706 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2021-12-28 06:01:39,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 06:01:39,706 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-12-28 06:01:39,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:39,707 INFO L225 Difference]: With dead ends: 107 [2021-12-28 06:01:39,707 INFO L226 Difference]: Without dead ends: 107 [2021-12-28 06:01:39,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-28 06:01:39,707 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 274 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:39,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 307 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-28 06:01:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2021-12-28 06:01:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:39,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2021-12-28 06:01:39,709 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 45 [2021-12-28 06:01:39,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:39,709 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2021-12-28 06:01:39,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:39,709 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2021-12-28 06:01:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 06:01:39,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:39,710 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:39,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 06:01:39,710 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:39,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:39,711 INFO L85 PathProgramCache]: Analyzing trace with hash -2032584714, now seen corresponding path program 1 times [2021-12-28 06:01:39,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:39,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814663508] [2021-12-28 06:01:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:39,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:39,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:39,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 06:01:39,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:39,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814663508] [2021-12-28 06:01:39,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814663508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:39,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571726114] [2021-12-28 06:01:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:39,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:39,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:39,773 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 06:01:39,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 06:01:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:39,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 06:01:39,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 06:01:40,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 06:01:40,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571726114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 06:01:40,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 06:01:40,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2021-12-28 06:01:40,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370045126] [2021-12-28 06:01:40,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:40,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 06:01:40,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:40,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 06:01:40,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-28 06:01:40,077 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 06:01:40,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:40,127 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-12-28 06:01:40,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 06:01:40,127 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2021-12-28 06:01:40,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:40,128 INFO L225 Difference]: With dead ends: 107 [2021-12-28 06:01:40,128 INFO L226 Difference]: Without dead ends: 107 [2021-12-28 06:01:40,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-28 06:01:40,128 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 118 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:40,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 311 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 06:01:40,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-28 06:01:40,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2021-12-28 06:01:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 81 states have (on average 1.4197530864197532) internal successors, (115), 97 states have internal predecessors, (115), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2021-12-28 06:01:40,133 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 45 [2021-12-28 06:01:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:40,133 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2021-12-28 06:01:40,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 06:01:40,133 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2021-12-28 06:01:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 06:01:40,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:40,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:40,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:40,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:40,344 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1454244195, now seen corresponding path program 1 times [2021-12-28 06:01:40,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:40,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925741808] [2021-12-28 06:01:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:40,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:40,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:40,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 06:01:40,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:40,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925741808] [2021-12-28 06:01:40,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925741808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:40,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308972617] [2021-12-28 06:01:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:40,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:40,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:40,426 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 06:01:40,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 06:01:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:40,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 06:01:40,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 06:01:40,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 06:01:40,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308972617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 06:01:40,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 06:01:40,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2021-12-28 06:01:40,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645820656] [2021-12-28 06:01:40,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:40,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 06:01:40,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:40,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 06:01:40,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-28 06:01:40,716 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 06:01:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:40,784 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2021-12-28 06:01:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:40,784 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-12-28 06:01:40,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:40,785 INFO L225 Difference]: With dead ends: 102 [2021-12-28 06:01:40,785 INFO L226 Difference]: Without dead ends: 102 [2021-12-28 06:01:40,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-28 06:01:40,786 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 230 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:40,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 243 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-28 06:01:40,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-12-28 06:01:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 77 states have (on average 1.4155844155844155) internal successors, (109), 92 states have internal predecessors, (109), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2021-12-28 06:01:40,788 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 46 [2021-12-28 06:01:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:40,789 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2021-12-28 06:01:40,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 06:01:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2021-12-28 06:01:40,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 06:01:40,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:40,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:40,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:41,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-28 06:01:41,007 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:41,008 INFO L85 PathProgramCache]: Analyzing trace with hash -748626798, now seen corresponding path program 2 times [2021-12-28 06:01:41,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:41,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18665183] [2021-12-28 06:01:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:41,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:41,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:41,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-28 06:01:41,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:41,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18665183] [2021-12-28 06:01:41,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18665183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:41,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:41,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 06:01:41,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268345839] [2021-12-28 06:01:41,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:41,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 06:01:41,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:41,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 06:01:41,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 06:01:41,069 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:41,121 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2021-12-28 06:01:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 06:01:41,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2021-12-28 06:01:41,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:41,122 INFO L225 Difference]: With dead ends: 101 [2021-12-28 06:01:41,123 INFO L226 Difference]: Without dead ends: 101 [2021-12-28 06:01:41,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-28 06:01:41,123 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 88 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:41,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 239 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 06:01:41,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-28 06:01:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2021-12-28 06:01:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.394736842105263) internal successors, (106), 91 states have internal predecessors, (106), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2021-12-28 06:01:41,128 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 50 [2021-12-28 06:01:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:41,129 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2021-12-28 06:01:41,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2021-12-28 06:01:41,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 06:01:41,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:41,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:41,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 06:01:41,132 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:41,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:41,133 INFO L85 PathProgramCache]: Analyzing trace with hash -748626743, now seen corresponding path program 1 times [2021-12-28 06:01:41,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:41,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600827796] [2021-12-28 06:01:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:41,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:41,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:41,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 06:01:41,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:41,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600827796] [2021-12-28 06:01:41,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600827796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 06:01:41,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 06:01:41,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 06:01:41,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519090273] [2021-12-28 06:01:41,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 06:01:41,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 06:01:41,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:41,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 06:01:41,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-28 06:01:41,259 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:41,446 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2021-12-28 06:01:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 06:01:41,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2021-12-28 06:01:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:41,447 INFO L225 Difference]: With dead ends: 130 [2021-12-28 06:01:41,447 INFO L226 Difference]: Without dead ends: 130 [2021-12-28 06:01:41,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-28 06:01:41,448 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 378 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:41,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 337 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 06:01:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-28 06:01:41,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 95. [2021-12-28 06:01:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.355263157894737) internal successors, (103), 91 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:41,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2021-12-28 06:01:41,450 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 50 [2021-12-28 06:01:41,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:41,450 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2021-12-28 06:01:41,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 06:01:41,451 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2021-12-28 06:01:41,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 06:01:41,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:41,451 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:41,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-28 06:01:41,451 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:41,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1425902980, now seen corresponding path program 1 times [2021-12-28 06:01:41,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:41,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428219897] [2021-12-28 06:01:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:41,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:41,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:41,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:41,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:41,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428219897] [2021-12-28 06:01:41,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428219897] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:41,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990798064] [2021-12-28 06:01:41,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:41,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:41,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:41,888 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 06:01:41,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 06:01:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:42,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-28 06:01:42,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:42,100 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 [2021-12-28 06:01:42,202 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 06:01:42,202 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 [2021-12-28 06:01:42,226 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 [2021-12-28 06:01:42,267 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 06:01:42,268 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 26 treesize of output 27 [2021-12-28 06:01:42,299 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 06:01:42,300 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 [2021-12-28 06:01:42,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:42,310 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 31 treesize of output 26 [2021-12-28 06:01:42,453 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 06:01:42,454 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 [2021-12-28 06:01:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:42,523 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 31 treesize of output 26 [2021-12-28 06:01:42,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 06:01:42,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 06:01:42,588 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 25 treesize of output 16 [2021-12-28 06:01:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 06:01:42,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:43,938 INFO L353 Elim1Store]: treesize reduction 5, result has 88.4 percent of original size [2021-12-28 06:01:43,939 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 47 treesize of output 46 [2021-12-28 06:01:43,953 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2989 (Array Int Int)) (v_ArrVal_2986 (Array Int Int)) (v_ArrVal_2988 Int) (|v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_10| Int)) (or (not (<= 0 |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_10|)) (< |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_10|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_2986))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_2988))) (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1) (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_2989))) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_10|)))) is different from false [2021-12-28 06:01:43,975 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2989 (Array Int Int)) (v_ArrVal_2986 (Array Int Int)) (v_ArrVal_2988 Int) (|v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_10| Int)) (or (< |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_10|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_2986))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) v_ArrVal_2988))) (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| .cse1) (select .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) v_ArrVal_2989))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_10|)) (not (<= 0 |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_10|)))) is different from false [2021-12-28 06:01:43,990 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2989 (Array Int Int)) (v_ArrVal_2986 (Array Int Int)) (v_ArrVal_2985 (Array Int Int)) (v_ArrVal_2988 Int) (|v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_10| Int)) (or (< |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_10|) (not (<= 0 |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_10|)) (= (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_2985) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_2986))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) v_ArrVal_2988))) (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| .cse1) (select .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) v_ArrVal_2989))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_10|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) is different from false [2021-12-28 06:01:44,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 06:01:44,011 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 71 treesize of output 56 [2021-12-28 06:01:44,018 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 402 treesize of output 388 [2021-12-28 06:01:44,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 06:01:44,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 06:01:44,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 06:01:44,031 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 168 treesize of output 162 [2021-12-28 06:01:44,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 06:01:44,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 06:01:44,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 06:01:44,042 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 280 treesize of output 264 [2021-12-28 06:01:44,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 06:01:44,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 06:01:44,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 06:01:44,053 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 226 treesize of output 222 [2021-12-28 06:01:44,057 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 214 treesize of output 198 [2021-12-28 06:01:44,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990798064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:44,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 06:01:44,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 33 [2021-12-28 06:01:44,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170884139] [2021-12-28 06:01:44,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 06:01:44,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-28 06:01:44,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 06:01:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-28 06:01:44,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1981, Unknown=20, NotChecked=276, Total=2450 [2021-12-28 06:01:44,714 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 30 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:45,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 06:01:45,477 INFO L93 Difference]: Finished difference Result 158 states and 176 transitions. [2021-12-28 06:01:45,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-28 06:01:45,478 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 30 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2021-12-28 06:01:45,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 06:01:45,478 INFO L225 Difference]: With dead ends: 158 [2021-12-28 06:01:45,478 INFO L226 Difference]: Without dead ends: 158 [2021-12-28 06:01:45,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=373, Invalid=3159, Unknown=20, NotChecked=354, Total=3906 [2021-12-28 06:01:45,480 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 489 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 06:01:45,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 1079 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 06:01:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-28 06:01:45,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 103. [2021-12-28 06:01:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 84 states have (on average 1.3928571428571428) internal successors, (117), 99 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2021-12-28 06:01:45,485 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 53 [2021-12-28 06:01:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 06:01:45,485 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2021-12-28 06:01:45,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 30 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 06:01:45,486 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2021-12-28 06:01:45,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 06:01:45,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 06:01:45,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 06:01:45,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 06:01:45,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-28 06:01:45,695 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-12-28 06:01:45,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 06:01:45,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1425902981, now seen corresponding path program 1 times [2021-12-28 06:01:45,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 06:01:45,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453302459] [2021-12-28 06:01:45,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:45,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 06:01:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:46,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 06:01:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:46,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 06:01:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 06:01:46,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 06:01:46,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453302459] [2021-12-28 06:01:46,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453302459] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 06:01:46,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257495214] [2021-12-28 06:01:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 06:01:46,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 06:01:46,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 06:01:46,295 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 06:01:46,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 06:01:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 06:01:46,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-28 06:01:46,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 06:01:46,497 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 [2021-12-28 06:01:46,692 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 06:01:46,692 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 [2021-12-28 06:01:46,753 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 [2021-12-28 06:01:46,830 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 06:01:46,831 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 26 treesize of output 27 [2021-12-28 06:01:46,909 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 06:01:46,909 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 19 treesize of output 22 [2021-12-28 06:01:46,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:46,947 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 22 treesize of output 21 [2021-12-28 06:01:46,950 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 6 treesize of output 5 [2021-12-28 06:01:47,193 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-28 06:01:47,193 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 44 treesize of output 43 [2021-12-28 06:01:47,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:47,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-12-28 06:01:47,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:47,358 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 38 treesize of output 33 [2021-12-28 06:01:47,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 06:01:47,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2021-12-28 06:01:47,509 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 31 treesize of output 19 [2021-12-28 06:01:47,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 28 treesize of output 16 [2021-12-28 06:01:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-28 06:01:47,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 06:01:49,839 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_21| Int)) (or (and (forall ((v_ArrVal_3194 Int) (v_ArrVal_3195 Int)) (let ((.cse0 (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_21| 8))) (<= (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0 v_ArrVal_3195) |c_ULTIMATE.start_main_~s~0#1.offset|) 12) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0 v_ArrVal_3194) |c_ULTIMATE.start_main_~s~0#1.offset|))))) (forall ((v_ArrVal_3195 Int)) (<= 0 (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_21| 8) v_ArrVal_3195) |c_ULTIMATE.start_main_~s~0#1.offset|) 8)))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_21| |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2021-12-28 06:01:49,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 06:01:49,890 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 58 treesize of output 62 [2021-12-28 06:01:58,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 06:01:58,613 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 139 treesize of output 133 [2021-12-28 06:01:58,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 06:01:58,616 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 108 treesize of output 106 [2021-12-28 06:01:58,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 06:01:58,620 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 101 treesize of output 99