./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/forester-heap/dll-reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b 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/forester-heap/dll-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 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:45:45,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:45:45,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:45:45,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:45:45,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:45:45,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:45:45,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:45:45,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:45:45,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:45:45,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:45:45,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:45:45,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:45:45,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:45:45,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:45:45,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:45:45,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:45:45,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:45:45,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:45:45,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:45:45,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:45:45,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:45:45,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:45:45,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:45:45,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:45:45,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:45:45,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:45:45,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:45:45,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:45:45,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:45:45,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:45:45,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:45:45,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:45:45,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:45:45,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:45:45,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:45:45,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:45:45,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:45:45,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:45:45,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:45:45,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:45:45,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:45:45,662 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:45:45,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:45:45,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:45:45,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:45:45,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:45:45,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:45:45,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:45:45,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:45:45,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:45:45,689 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:45:45,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:45:45,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:45:45,690 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:45:45,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:45:45,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:45:45,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:45:45,691 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:45:45,691 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:45:45,691 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:45:45,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:45:45,691 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:45:45,692 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:45:45,692 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:45:45,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:45:45,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:45:45,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:45:45,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:45:45,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:45:45,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:45:45,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:45:45,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:45:45,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:45:45,694 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 [2021-12-14 19:45:45,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:45:45,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:45:45,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:45:45,908 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:45:45,908 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:45:45,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-reverse.i [2021-12-14 19:45:45,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d72d51f0/3545a7783c7a4bb1afec0b92ce18e944/FLAGbf8cfeb7a [2021-12-14 19:45:46,387 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:45:46,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i [2021-12-14 19:45:46,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d72d51f0/3545a7783c7a4bb1afec0b92ce18e944/FLAGbf8cfeb7a [2021-12-14 19:45:46,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d72d51f0/3545a7783c7a4bb1afec0b92ce18e944 [2021-12-14 19:45:46,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:45:46,406 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:45:46,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:45:46,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:45:46,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:45:46,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:45:46" (1/1) ... [2021-12-14 19:45:46,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cddc04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:45:46, skipping insertion in model container [2021-12-14 19:45:46,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:45:46" (1/1) ... [2021-12-14 19:45:46,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:45:46,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:45:46,697 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/forester-heap/dll-reverse.i[22309,22322] [2021-12-14 19:45:46,701 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/forester-heap/dll-reverse.i[22394,22407] [2021-12-14 19:45:46,708 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/forester-heap/dll-reverse.i[22924,22937] [2021-12-14 19:45:46,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:45:46,716 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:45:46,741 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/forester-heap/dll-reverse.i[22309,22322] [2021-12-14 19:45:46,742 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/forester-heap/dll-reverse.i[22394,22407] [2021-12-14 19:45:46,745 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/forester-heap/dll-reverse.i[22924,22937] [2021-12-14 19:45:46,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:45:46,763 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:45:46,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:45:46 WrapperNode [2021-12-14 19:45:46,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:45:46,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:45:46,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:45:46,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:45:46,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:45:46" (1/1) ... [2021-12-14 19:45:46,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:45:46" (1/1) ... [2021-12-14 19:45:46,803 INFO L137 Inliner]: procedures = 119, calls = 41, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 147 [2021-12-14 19:45:46,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:45:46,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:45:46,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:45:46,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:45:46,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:45:46" (1/1) ... [2021-12-14 19:45:46,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:45:46" (1/1) ... [2021-12-14 19:45:46,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:45:46" (1/1) ... [2021-12-14 19:45:46,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:45:46" (1/1) ... [2021-12-14 19:45:46,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:45:46" (1/1) ... [2021-12-14 19:45:46,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:45:46" (1/1) ... [2021-12-14 19:45:46,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:45:46" (1/1) ... [2021-12-14 19:45:46,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:45:46,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:45:46,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:45:46,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:45:46,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:45:46" (1/1) ... [2021-12-14 19:45:46,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:45:46,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:45:46,874 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) [2021-12-14 19:45:46,877 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 [2021-12-14 19:45:46,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 19:45:46,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 19:45:46,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 19:45:46,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 19:45:46,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 19:45:46,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 19:45:46,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:45:46,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 19:45:46,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:45:46,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:45:46,959 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:45:46,960 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:45:47,199 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:45:47,203 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:45:47,204 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-14 19:45:47,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:45:47 BoogieIcfgContainer [2021-12-14 19:45:47,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:45:47,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:45:47,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:45:47,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:45:47,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:45:46" (1/3) ... [2021-12-14 19:45:47,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190dc3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:45:47, skipping insertion in model container [2021-12-14 19:45:47,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:45:46" (2/3) ... [2021-12-14 19:45:47,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190dc3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:45:47, skipping insertion in model container [2021-12-14 19:45:47,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:45:47" (3/3) ... [2021-12-14 19:45:47,210 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2021-12-14 19:45:47,214 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:45:47,214 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 69 error locations. [2021-12-14 19:45:47,246 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:45:47,259 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 [2021-12-14 19:45:47,259 INFO L340 AbstractCegarLoop]: Starting to check reachability of 69 error locations. [2021-12-14 19:45:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 148 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-14 19:45:47,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:47,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-14 19:45:47,284 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:47,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:47,287 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-14 19:45:47,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:47,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265593944] [2021-12-14 19:45:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:47,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:47,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:47,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265593944] [2021-12-14 19:45:47,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265593944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:47,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:47,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:45:47,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663363090] [2021-12-14 19:45:47,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:47,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:45:47,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:47,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:45:47,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:45:47,407 INFO L87 Difference]: Start difference. First operand has 149 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 148 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:47,529 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-12-14 19:45:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:45:47,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-14 19:45:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:47,540 INFO L225 Difference]: With dead ends: 146 [2021-12-14 19:45:47,540 INFO L226 Difference]: Without dead ends: 144 [2021-12-14 19:45:47,542 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 [2021-12-14 19:45:47,548 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 100 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:47,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 128 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:45:47,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-14 19:45:47,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-12-14 19:45:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 78 states have (on average 1.9487179487179487) internal successors, (152), 143 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2021-12-14 19:45:47,588 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 3 [2021-12-14 19:45:47,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:47,588 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2021-12-14 19:45:47,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2021-12-14 19:45:47,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-14 19:45:47,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:47,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-14 19:45:47,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 19:45:47,590 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:47,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:47,592 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-14 19:45:47,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:47,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543558674] [2021-12-14 19:45:47,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:47,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:47,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:47,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543558674] [2021-12-14 19:45:47,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543558674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:47,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:47,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:45:47,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517997923] [2021-12-14 19:45:47,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:47,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:45:47,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:47,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:45:47,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:45:47,662 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:47,752 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2021-12-14 19:45:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:45:47,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-14 19:45:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:47,756 INFO L225 Difference]: With dead ends: 141 [2021-12-14 19:45:47,756 INFO L226 Difference]: Without dead ends: 141 [2021-12-14 19:45:47,757 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 [2021-12-14 19:45:47,758 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 97 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:47,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 124 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:45:47,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-14 19:45:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-14 19:45:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 78 states have (on average 1.9102564102564104) internal successors, (149), 140 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 149 transitions. [2021-12-14 19:45:47,763 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 149 transitions. Word has length 3 [2021-12-14 19:45:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:47,763 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 149 transitions. [2021-12-14 19:45:47,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 149 transitions. [2021-12-14 19:45:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 19:45:47,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:47,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:47,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 19:45:47,764 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:47,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1837112042, now seen corresponding path program 1 times [2021-12-14 19:45:47,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:47,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143095711] [2021-12-14 19:45:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:47,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:47,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:47,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143095711] [2021-12-14 19:45:47,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143095711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:47,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:47,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:45:47,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019423233] [2021-12-14 19:45:47,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:47,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:45:47,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:47,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:45:47,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:45:47,832 INFO L87 Difference]: Start difference. First operand 141 states and 149 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:47,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:47,964 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2021-12-14 19:45:47,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:45:47,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-14 19:45:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:47,965 INFO L225 Difference]: With dead ends: 132 [2021-12-14 19:45:47,965 INFO L226 Difference]: Without dead ends: 132 [2021-12-14 19:45:47,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:45:47,966 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 168 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:47,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 90 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:45:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-14 19:45:47,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2021-12-14 19:45:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 82 states have (on average 1.7073170731707317) internal successors, (140), 127 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 140 transitions. [2021-12-14 19:45:47,971 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 140 transitions. Word has length 9 [2021-12-14 19:45:47,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:47,972 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 140 transitions. [2021-12-14 19:45:47,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:47,972 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 140 transitions. [2021-12-14 19:45:47,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 19:45:47,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:47,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:47,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 19:45:47,973 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:47,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1837112043, now seen corresponding path program 1 times [2021-12-14 19:45:47,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:47,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073672033] [2021-12-14 19:45:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:47,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:48,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:48,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073672033] [2021-12-14 19:45:48,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073672033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:48,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:48,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:45:48,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971496981] [2021-12-14 19:45:48,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:48,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:45:48,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:48,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:45:48,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:45:48,035 INFO L87 Difference]: Start difference. First operand 128 states and 140 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:48,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:48,189 INFO L93 Difference]: Finished difference Result 176 states and 190 transitions. [2021-12-14 19:45:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:45:48,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-14 19:45:48,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:48,190 INFO L225 Difference]: With dead ends: 176 [2021-12-14 19:45:48,190 INFO L226 Difference]: Without dead ends: 176 [2021-12-14 19:45:48,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:45:48,191 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 176 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:48,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 137 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:45:48,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-14 19:45:48,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 157. [2021-12-14 19:45:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 111 states have (on average 1.5945945945945945) internal successors, (177), 156 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 177 transitions. [2021-12-14 19:45:48,197 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 177 transitions. Word has length 9 [2021-12-14 19:45:48,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:48,197 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 177 transitions. [2021-12-14 19:45:48,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 177 transitions. [2021-12-14 19:45:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 19:45:48,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:48,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:48,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 19:45:48,198 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:48,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:48,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1363413642, now seen corresponding path program 1 times [2021-12-14 19:45:48,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:48,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145758023] [2021-12-14 19:45:48,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:48,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:48,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:48,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145758023] [2021-12-14 19:45:48,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145758023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:48,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:48,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:45:48,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704373096] [2021-12-14 19:45:48,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:48,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:45:48,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:48,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:45:48,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:45:48,253 INFO L87 Difference]: Start difference. First operand 157 states and 177 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:48,398 INFO L93 Difference]: Finished difference Result 156 states and 175 transitions. [2021-12-14 19:45:48,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:45:48,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-14 19:45:48,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:48,399 INFO L225 Difference]: With dead ends: 156 [2021-12-14 19:45:48,399 INFO L226 Difference]: Without dead ends: 156 [2021-12-14 19:45:48,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:45:48,400 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 6 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:48,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 297 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:45:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-14 19:45:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-12-14 19:45:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 111 states have (on average 1.5765765765765767) internal successors, (175), 155 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 175 transitions. [2021-12-14 19:45:48,405 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 175 transitions. Word has length 12 [2021-12-14 19:45:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:48,405 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 175 transitions. [2021-12-14 19:45:48,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 175 transitions. [2021-12-14 19:45:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 19:45:48,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:48,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:48,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 19:45:48,407 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:48,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:48,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1363413643, now seen corresponding path program 1 times [2021-12-14 19:45:48,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:48,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226131872] [2021-12-14 19:45:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:48,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:48,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:48,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226131872] [2021-12-14 19:45:48,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226131872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:48,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:48,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:45:48,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789722944] [2021-12-14 19:45:48,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:48,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:45:48,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:48,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:45:48,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:45:48,445 INFO L87 Difference]: Start difference. First operand 156 states and 175 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:48,565 INFO L93 Difference]: Finished difference Result 155 states and 173 transitions. [2021-12-14 19:45:48,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:45:48,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-14 19:45:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:48,566 INFO L225 Difference]: With dead ends: 155 [2021-12-14 19:45:48,566 INFO L226 Difference]: Without dead ends: 155 [2021-12-14 19:45:48,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:45:48,567 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 7 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:48,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 315 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:45:48,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-14 19:45:48,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-12-14 19:45:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 111 states have (on average 1.5585585585585586) internal successors, (173), 154 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2021-12-14 19:45:48,571 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 12 [2021-12-14 19:45:48,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:48,571 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2021-12-14 19:45:48,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:48,571 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2021-12-14 19:45:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-14 19:45:48,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:48,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:48,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 19:45:48,572 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:48,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:48,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1455563597, now seen corresponding path program 1 times [2021-12-14 19:45:48,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:48,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974750227] [2021-12-14 19:45:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:48,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:48,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:48,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974750227] [2021-12-14 19:45:48,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974750227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:48,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:48,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:45:48,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994419257] [2021-12-14 19:45:48,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:48,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:45:48,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:48,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:45:48,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:45:48,619 INFO L87 Difference]: Start difference. First operand 155 states and 173 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:48,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:48,711 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2021-12-14 19:45:48,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:45:48,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-14 19:45:48,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:48,712 INFO L225 Difference]: With dead ends: 167 [2021-12-14 19:45:48,712 INFO L226 Difference]: Without dead ends: 167 [2021-12-14 19:45:48,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:45:48,713 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 158 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:48,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 190 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:45:48,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-14 19:45:48,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2021-12-14 19:45:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 111 states have (on average 1.5315315315315314) internal successors, (170), 154 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 170 transitions. [2021-12-14 19:45:48,717 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 170 transitions. Word has length 15 [2021-12-14 19:45:48,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:48,717 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 170 transitions. [2021-12-14 19:45:48,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 170 transitions. [2021-12-14 19:45:48,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 19:45:48,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:48,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:48,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 19:45:48,718 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:48,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:48,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1546362871, now seen corresponding path program 1 times [2021-12-14 19:45:48,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:48,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267733125] [2021-12-14 19:45:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:48,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:48,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:48,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267733125] [2021-12-14 19:45:48,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267733125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:48,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:48,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 19:45:48,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204092234] [2021-12-14 19:45:48,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:48,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:45:48,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:45:48,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:45:48,806 INFO L87 Difference]: Start difference. First operand 155 states and 170 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:49,052 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2021-12-14 19:45:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:45:49,052 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 19:45:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:49,053 INFO L225 Difference]: With dead ends: 155 [2021-12-14 19:45:49,053 INFO L226 Difference]: Without dead ends: 155 [2021-12-14 19:45:49,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:45:49,054 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 168 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:49,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 247 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:45:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-14 19:45:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-12-14 19:45:49,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 111 states have (on average 1.5225225225225225) internal successors, (169), 153 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:49,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 169 transitions. [2021-12-14 19:45:49,057 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 169 transitions. Word has length 16 [2021-12-14 19:45:49,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:49,057 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 169 transitions. [2021-12-14 19:45:49,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:49,057 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 169 transitions. [2021-12-14 19:45:49,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 19:45:49,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:49,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:49,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 19:45:49,057 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:49,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1546362872, now seen corresponding path program 1 times [2021-12-14 19:45:49,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:49,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739248767] [2021-12-14 19:45:49,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:49,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:49,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:49,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739248767] [2021-12-14 19:45:49,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739248767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:49,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:49,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 19:45:49,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428035355] [2021-12-14 19:45:49,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:49,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:45:49,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:49,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:45:49,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:45:49,238 INFO L87 Difference]: Start difference. First operand 154 states and 169 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:49,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:49,837 INFO L93 Difference]: Finished difference Result 152 states and 166 transitions. [2021-12-14 19:45:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 19:45:49,837 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 19:45:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:49,838 INFO L225 Difference]: With dead ends: 152 [2021-12-14 19:45:49,838 INFO L226 Difference]: Without dead ends: 152 [2021-12-14 19:45:49,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-12-14 19:45:49,841 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 159 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:49,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 333 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 19:45:49,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-14 19:45:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 141. [2021-12-14 19:45:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 103 states have (on average 1.5048543689320388) internal successors, (155), 140 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2021-12-14 19:45:49,844 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 16 [2021-12-14 19:45:49,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:49,845 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2021-12-14 19:45:49,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2021-12-14 19:45:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 19:45:49,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:49,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:49,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 19:45:49,845 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:49,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:49,846 INFO L85 PathProgramCache]: Analyzing trace with hash 743663712, now seen corresponding path program 1 times [2021-12-14 19:45:49,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:49,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539133400] [2021-12-14 19:45:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:49,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:49,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:49,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539133400] [2021-12-14 19:45:49,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539133400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:49,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:49,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 19:45:49,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475139758] [2021-12-14 19:45:49,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:49,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:45:49,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:49,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:45:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:45:49,919 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:50,049 INFO L93 Difference]: Finished difference Result 162 states and 178 transitions. [2021-12-14 19:45:50,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:45:50,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-14 19:45:50,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:50,050 INFO L225 Difference]: With dead ends: 162 [2021-12-14 19:45:50,050 INFO L226 Difference]: Without dead ends: 162 [2021-12-14 19:45:50,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:45:50,050 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 27 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:50,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 442 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:45:50,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-14 19:45:50,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2021-12-14 19:45:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.4774774774774775) internal successors, (164), 148 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2021-12-14 19:45:50,053 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 18 [2021-12-14 19:45:50,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:50,053 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2021-12-14 19:45:50,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2021-12-14 19:45:50,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:45:50,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:50,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:50,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 19:45:50,054 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:50,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:50,054 INFO L85 PathProgramCache]: Analyzing trace with hash -573987105, now seen corresponding path program 1 times [2021-12-14 19:45:50,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:50,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571472615] [2021-12-14 19:45:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:50,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:50,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:50,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571472615] [2021-12-14 19:45:50,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571472615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:50,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:50,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 19:45:50,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52285629] [2021-12-14 19:45:50,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:50,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:45:50,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:50,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:45:50,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:45:50,104 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:50,236 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2021-12-14 19:45:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:45:50,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-14 19:45:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:50,237 INFO L225 Difference]: With dead ends: 168 [2021-12-14 19:45:50,237 INFO L226 Difference]: Without dead ends: 168 [2021-12-14 19:45:50,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:45:50,238 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 25 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:50,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 319 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:45:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-14 19:45:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 159. [2021-12-14 19:45:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 121 states have (on average 1.462809917355372) internal successors, (177), 158 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 177 transitions. [2021-12-14 19:45:50,240 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 177 transitions. Word has length 20 [2021-12-14 19:45:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:50,240 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 177 transitions. [2021-12-14 19:45:50,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,241 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 177 transitions. [2021-12-14 19:45:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 19:45:50,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:50,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:50,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 19:45:50,241 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:50,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:50,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1867739349, now seen corresponding path program 1 times [2021-12-14 19:45:50,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:50,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466591689] [2021-12-14 19:45:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:50,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:50,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:50,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466591689] [2021-12-14 19:45:50,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466591689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:50,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:50,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:45:50,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049989241] [2021-12-14 19:45:50,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:50,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:45:50,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:50,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:45:50,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:45:50,270 INFO L87 Difference]: Start difference. First operand 159 states and 177 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:50,369 INFO L93 Difference]: Finished difference Result 158 states and 175 transitions. [2021-12-14 19:45:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:45:50,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-14 19:45:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:50,370 INFO L225 Difference]: With dead ends: 158 [2021-12-14 19:45:50,370 INFO L226 Difference]: Without dead ends: 158 [2021-12-14 19:45:50,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:45:50,370 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 9 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:50,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 294 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:45:50,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-14 19:45:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-12-14 19:45:50,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 121 states have (on average 1.4462809917355373) internal successors, (175), 157 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 175 transitions. [2021-12-14 19:45:50,373 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 175 transitions. Word has length 22 [2021-12-14 19:45:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:50,373 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 175 transitions. [2021-12-14 19:45:50,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,373 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 175 transitions. [2021-12-14 19:45:50,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 19:45:50,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:50,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:50,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 19:45:50,374 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:50,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1867739348, now seen corresponding path program 1 times [2021-12-14 19:45:50,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:50,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590589259] [2021-12-14 19:45:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:50,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:50,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:50,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590589259] [2021-12-14 19:45:50,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590589259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:50,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:50,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:45:50,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102994153] [2021-12-14 19:45:50,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:50,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:45:50,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:50,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:45:50,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:45:50,426 INFO L87 Difference]: Start difference. First operand 158 states and 175 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:50,539 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2021-12-14 19:45:50,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:45:50,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-14 19:45:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:50,540 INFO L225 Difference]: With dead ends: 157 [2021-12-14 19:45:50,540 INFO L226 Difference]: Without dead ends: 157 [2021-12-14 19:45:50,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:45:50,540 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 4 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:50,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 284 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:45:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-14 19:45:50,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-12-14 19:45:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 121 states have (on average 1.4297520661157024) internal successors, (173), 156 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 173 transitions. [2021-12-14 19:45:50,543 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 173 transitions. Word has length 22 [2021-12-14 19:45:50,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:50,543 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 173 transitions. [2021-12-14 19:45:50,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,543 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 173 transitions. [2021-12-14 19:45:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 19:45:50,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:50,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:50,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 19:45:50,544 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:50,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:50,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1012469357, now seen corresponding path program 1 times [2021-12-14 19:45:50,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:50,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404240247] [2021-12-14 19:45:50,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:50,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:50,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:50,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404240247] [2021-12-14 19:45:50,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404240247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:50,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:50,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 19:45:50,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605377135] [2021-12-14 19:45:50,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:50,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:45:50,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:45:50,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:45:50,632 INFO L87 Difference]: Start difference. First operand 157 states and 173 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:50,901 INFO L93 Difference]: Finished difference Result 157 states and 172 transitions. [2021-12-14 19:45:50,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:45:50,901 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-14 19:45:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:50,902 INFO L225 Difference]: With dead ends: 157 [2021-12-14 19:45:50,902 INFO L226 Difference]: Without dead ends: 157 [2021-12-14 19:45:50,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:45:50,902 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 140 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:50,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 273 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:45:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-14 19:45:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2021-12-14 19:45:50,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 121 states have (on average 1.421487603305785) internal successors, (172), 155 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 172 transitions. [2021-12-14 19:45:50,905 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 172 transitions. Word has length 26 [2021-12-14 19:45:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:50,905 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 172 transitions. [2021-12-14 19:45:50,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:50,905 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 172 transitions. [2021-12-14 19:45:50,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 19:45:50,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:50,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:50,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 19:45:50,906 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:50,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:50,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1012469358, now seen corresponding path program 1 times [2021-12-14 19:45:50,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:50,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617291995] [2021-12-14 19:45:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:50,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:50,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:50,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617291995] [2021-12-14 19:45:50,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617291995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:45:50,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:45:50,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 19:45:50,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474926470] [2021-12-14 19:45:50,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:45:50,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:45:50,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:50,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:45:50,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:45:50,997 INFO L87 Difference]: Start difference. First operand 156 states and 172 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:51,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:51,293 INFO L93 Difference]: Finished difference Result 156 states and 171 transitions. [2021-12-14 19:45:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 19:45:51,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-14 19:45:51,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:51,294 INFO L225 Difference]: With dead ends: 156 [2021-12-14 19:45:51,294 INFO L226 Difference]: Without dead ends: 156 [2021-12-14 19:45:51,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-12-14 19:45:51,295 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 137 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:51,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 313 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:45:51,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-14 19:45:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-12-14 19:45:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 121 states have (on average 1.4049586776859504) internal successors, (170), 153 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 170 transitions. [2021-12-14 19:45:51,297 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 170 transitions. Word has length 26 [2021-12-14 19:45:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:51,297 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 170 transitions. [2021-12-14 19:45:51,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 170 transitions. [2021-12-14 19:45:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 19:45:51,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:51,298 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:51,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 19:45:51,298 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:51,298 INFO L85 PathProgramCache]: Analyzing trace with hash -560637622, now seen corresponding path program 1 times [2021-12-14 19:45:51,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:51,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062977736] [2021-12-14 19:45:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:51,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:51,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:51,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062977736] [2021-12-14 19:45:51,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062977736] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:45:51,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88705512] [2021-12-14 19:45:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:51,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:45:51,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:45:51,508 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) [2021-12-14 19:45:51,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 19:45:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:51,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-14 19:45:51,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:45:51,660 INFO L388 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 [2021-12-14 19:45:51,748 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 19:45:51,749 INFO L388 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 [2021-12-14 19:45:51,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:45:51,907 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:45:51,907 INFO L388 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 [2021-12-14 19:45:52,008 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:45:52,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-14 19:45:52,037 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:45:52,038 INFO L388 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 [2021-12-14 19:45:52,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:45:52,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-14 19:45:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:52,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:45:52,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:45:52,627 INFO L388 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 38 treesize of output 31 [2021-12-14 19:45:52,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:45:52,639 INFO L388 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 252 treesize of output 227 [2021-12-14 19:45:52,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 204 [2021-12-14 19:45:52,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:45:52,654 INFO L388 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 204 treesize of output 196 [2021-12-14 19:45:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:54,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88705512] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:45:54,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:45:54,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 34 [2021-12-14 19:45:54,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824148690] [2021-12-14 19:45:54,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:45:54,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-14 19:45:54,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:54,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-14 19:45:54,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=999, Unknown=21, NotChecked=0, Total=1190 [2021-12-14 19:45:54,713 INFO L87 Difference]: Start difference. First operand 154 states and 170 transitions. Second operand has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:55,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:55,229 INFO L93 Difference]: Finished difference Result 225 states and 248 transitions. [2021-12-14 19:45:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 19:45:55,230 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-14 19:45:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:55,230 INFO L225 Difference]: With dead ends: 225 [2021-12-14 19:45:55,230 INFO L226 Difference]: Without dead ends: 225 [2021-12-14 19:45:55,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=283, Invalid=1336, Unknown=21, NotChecked=0, Total=1640 [2021-12-14 19:45:55,231 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 517 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1065 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:55,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 847 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 899 Invalid, 0 Unknown, 1065 Unchecked, 0.4s Time] [2021-12-14 19:45:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-12-14 19:45:55,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 175. [2021-12-14 19:45:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 142 states have (on average 1.3732394366197183) internal successors, (195), 174 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 195 transitions. [2021-12-14 19:45:55,234 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 195 transitions. Word has length 29 [2021-12-14 19:45:55,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:55,234 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 195 transitions. [2021-12-14 19:45:55,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 195 transitions. [2021-12-14 19:45:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 19:45:55,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:55,235 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:55,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 19:45:55,436 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,SelfDestructingSolverStorable15 [2021-12-14 19:45:55,436 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:55,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:55,436 INFO L85 PathProgramCache]: Analyzing trace with hash -560637621, now seen corresponding path program 1 times [2021-12-14 19:45:55,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:55,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022521724] [2021-12-14 19:45:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:55,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:55,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:55,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022521724] [2021-12-14 19:45:55,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022521724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:45:55,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291306961] [2021-12-14 19:45:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:55,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:45:55,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:45:55,644 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) [2021-12-14 19:45:55,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 19:45:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:55,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-14 19:45:55,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:45:55,735 INFO L388 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 [2021-12-14 19:45:55,804 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:45:55,804 INFO L388 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 [2021-12-14 19:45:55,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:45:55,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:45:55,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:45:55,942 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:45:55,942 INFO L388 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 [2021-12-14 19:45:55,946 INFO L388 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 [2021-12-14 19:45:56,043 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:45:56,043 INFO L388 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 14 treesize of output 20 [2021-12-14 19:45:56,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-14 19:45:56,060 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:45:56,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-14 19:45:56,124 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:45:56,124 INFO L388 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 [2021-12-14 19:45:56,128 INFO L388 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 [2021-12-14 19:45:56,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:45:56,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:45:56,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:45:56,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:45:56,299 INFO L388 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 [2021-12-14 19:45:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:56,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:45:57,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:45:57,138 INFO L388 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 110 treesize of output 103 [2021-12-14 19:45:57,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:45:57,144 INFO L388 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 103 treesize of output 79 [2021-12-14 19:45:57,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:45:57,153 INFO L388 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 386 treesize of output 349 [2021-12-14 19:45:57,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:45:57,165 INFO L388 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 967 treesize of output 930 [2021-12-14 19:45:57,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 899 treesize of output 883 [2021-12-14 19:45:57,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 883 treesize of output 851 [2021-12-14 19:45:57,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 851 treesize of output 819 [2021-12-14 19:45:57,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:45:57,211 INFO L388 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 819 treesize of output 772 [2021-12-14 19:45:57,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 763 treesize of output 751 [2021-12-14 19:45:57,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 751 treesize of output 745 [2021-12-14 19:45:57,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 745 treesize of output 733 [2021-12-14 19:45:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:57,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291306961] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:45:57,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:45:57,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 37 [2021-12-14 19:45:57,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151018334] [2021-12-14 19:45:57,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:45:57,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-14 19:45:57,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:45:57,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-14 19:45:57,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1254, Unknown=20, NotChecked=0, Total=1406 [2021-12-14 19:45:57,886 INFO L87 Difference]: Start difference. First operand 175 states and 195 transitions. Second operand has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:59,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:45:59,522 INFO L93 Difference]: Finished difference Result 365 states and 400 transitions. [2021-12-14 19:45:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-14 19:45:59,523 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-14 19:45:59,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:45:59,524 INFO L225 Difference]: With dead ends: 365 [2021-12-14 19:45:59,524 INFO L226 Difference]: Without dead ends: 365 [2021-12-14 19:45:59,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=491, Invalid=2795, Unknown=20, NotChecked=0, Total=3306 [2021-12-14 19:45:59,527 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 633 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 3329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1053 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 19:45:59,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1609 Invalid, 3329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2137 Invalid, 0 Unknown, 1053 Unchecked, 0.9s Time] [2021-12-14 19:45:59,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-14 19:45:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 173. [2021-12-14 19:45:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 146 states have (on average 1.356164383561644) internal successors, (198), 172 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 198 transitions. [2021-12-14 19:45:59,530 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 198 transitions. Word has length 29 [2021-12-14 19:45:59,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:45:59,531 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 198 transitions. [2021-12-14 19:45:59,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:45:59,531 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 198 transitions. [2021-12-14 19:45:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-14 19:45:59,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:45:59,534 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:45:59,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:45:59,750 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,SelfDestructingSolverStorable16 [2021-12-14 19:45:59,751 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:45:59,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:45:59,751 INFO L85 PathProgramCache]: Analyzing trace with hash -557177017, now seen corresponding path program 1 times [2021-12-14 19:45:59,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:45:59,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284586591] [2021-12-14 19:45:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:59,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:45:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:45:59,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:45:59,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284586591] [2021-12-14 19:45:59,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284586591] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:45:59,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63285827] [2021-12-14 19:45:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:45:59,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:45:59,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:45:59,903 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) [2021-12-14 19:45:59,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 19:45:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:45:59,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 19:45:59,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:46:00,003 INFO L388 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 [2021-12-14 19:46:00,056 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 19:46:00,057 INFO L388 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 [2021-12-14 19:46:00,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:46:00,158 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:46:00,159 INFO L388 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 [2021-12-14 19:46:00,229 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:46:00,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-14 19:46:00,243 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:46:00,243 INFO L388 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 [2021-12-14 19:46:00,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:46:00,391 INFO L388 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 [2021-12-14 19:46:00,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:46:00,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-14 19:46:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:00,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:46:00,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:46:00,742 INFO L388 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 38 treesize of output 31 [2021-12-14 19:46:00,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:46:00,752 INFO L388 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 252 treesize of output 227 [2021-12-14 19:46:00,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 204 [2021-12-14 19:46:00,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:46:00,780 INFO L388 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 204 treesize of output 196 [2021-12-14 19:46:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:02,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63285827] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:46:02,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:46:02,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 32 [2021-12-14 19:46:02,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505376346] [2021-12-14 19:46:02,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:46:02,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 19:46:02,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:02,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 19:46:02,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=884, Unknown=21, NotChecked=0, Total=1056 [2021-12-14 19:46:02,686 INFO L87 Difference]: Start difference. First operand 173 states and 198 transitions. Second operand has 33 states, 32 states have (on average 2.53125) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:03,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:03,050 INFO L93 Difference]: Finished difference Result 276 states and 308 transitions. [2021-12-14 19:46:03,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 19:46:03,050 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.53125) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-14 19:46:03,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:03,051 INFO L225 Difference]: With dead ends: 276 [2021-12-14 19:46:03,052 INFO L226 Difference]: Without dead ends: 276 [2021-12-14 19:46:03,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=260, Invalid=1359, Unknown=21, NotChecked=0, Total=1640 [2021-12-14 19:46:03,052 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 367 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1051 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:03,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 1008 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 802 Invalid, 0 Unknown, 1051 Unchecked, 0.3s Time] [2021-12-14 19:46:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-14 19:46:03,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 180. [2021-12-14 19:46:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 153 states have (on average 1.3529411764705883) internal successors, (207), 179 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 207 transitions. [2021-12-14 19:46:03,056 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 207 transitions. Word has length 31 [2021-12-14 19:46:03,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:03,056 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 207 transitions. [2021-12-14 19:46:03,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.53125) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:03,057 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 207 transitions. [2021-12-14 19:46:03,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-14 19:46:03,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:03,057 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:46:03,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 19:46:03,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 19:46:03,267 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:46:03,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:03,268 INFO L85 PathProgramCache]: Analyzing trace with hash -557177016, now seen corresponding path program 1 times [2021-12-14 19:46:03,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:03,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408055638] [2021-12-14 19:46:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:03,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:03,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:03,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408055638] [2021-12-14 19:46:03,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408055638] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:46:03,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897841651] [2021-12-14 19:46:03,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:03,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:46:03,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:46:03,464 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) [2021-12-14 19:46:03,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 19:46:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:03,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-14 19:46:03,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:46:03,567 INFO L388 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 [2021-12-14 19:46:03,634 INFO L388 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 [2021-12-14 19:46:03,645 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:46:03,646 INFO L388 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 [2021-12-14 19:46:03,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:46:03,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:46:03,777 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:46:03,777 INFO L388 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 [2021-12-14 19:46:03,781 INFO L388 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 [2021-12-14 19:46:03,877 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:46:03,877 INFO L388 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 14 treesize of output 20 [2021-12-14 19:46:03,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-14 19:46:03,897 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:46:03,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-14 19:46:03,929 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:46:03,930 INFO L388 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 [2021-12-14 19:46:03,933 INFO L388 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 [2021-12-14 19:46:04,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:46:04,067 INFO L388 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 [2021-12-14 19:46:04,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:46:04,071 INFO L388 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 [2021-12-14 19:46:04,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:46:04,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:46:04,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:46:04,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:46:04,119 INFO L388 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 [2021-12-14 19:46:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:04,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:46:04,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:46:04,796 INFO L388 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 112 treesize of output 105 [2021-12-14 19:46:04,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:46:04,801 INFO L388 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 105 treesize of output 81 [2021-12-14 19:46:04,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:46:04,811 INFO L388 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 688 treesize of output 619 [2021-12-14 19:46:04,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:46:04,823 INFO L388 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 1795 treesize of output 1722 [2021-12-14 19:46:04,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1691 treesize of output 1627 [2021-12-14 19:46:04,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1627 treesize of output 1595 [2021-12-14 19:46:04,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1595 treesize of output 1531 [2021-12-14 19:46:04,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:46:04,887 INFO L388 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 1531 treesize of output 1432 [2021-12-14 19:46:04,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1423 treesize of output 1407 [2021-12-14 19:46:04,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1407 treesize of output 1399 [2021-12-14 19:46:04,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1399 treesize of output 1387 [2021-12-14 19:46:04,920 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-14 19:46:04,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:46:04,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-14 19:46:04,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107638109] [2021-12-14 19:46:04,921 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 19:46:04,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 19:46:04,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:04,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 19:46:04,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=791, Unknown=17, NotChecked=0, Total=930 [2021-12-14 19:46:04,923 INFO L87 Difference]: Start difference. First operand 180 states and 207 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:05,428 INFO L93 Difference]: Finished difference Result 239 states and 270 transitions. [2021-12-14 19:46:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 19:46:05,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-14 19:46:05,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:05,429 INFO L225 Difference]: With dead ends: 239 [2021-12-14 19:46:05,429 INFO L226 Difference]: Without dead ends: 239 [2021-12-14 19:46:05,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=1407, Unknown=17, NotChecked=0, Total=1640 [2021-12-14 19:46:05,430 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 183 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:05,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 397 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:46:05,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-14 19:46:05,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 180. [2021-12-14 19:46:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 153 states have (on average 1.34640522875817) internal successors, (206), 179 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:05,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2021-12-14 19:46:05,432 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 31 [2021-12-14 19:46:05,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:05,432 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2021-12-14 19:46:05,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:05,433 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2021-12-14 19:46:05,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-14 19:46:05,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:05,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:46:05,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:46:05,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:46:05,643 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:46:05,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:05,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1435398869, now seen corresponding path program 1 times [2021-12-14 19:46:05,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:05,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861898659] [2021-12-14 19:46:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:05,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:46:05,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:05,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861898659] [2021-12-14 19:46:05,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861898659] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:46:05,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863722983] [2021-12-14 19:46:05,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:05,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:46:05,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:46:05,707 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) [2021-12-14 19:46:05,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 19:46:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:05,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 19:46:05,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:46:05,933 INFO L388 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 17 [2021-12-14 19:46:05,935 INFO L388 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 21 treesize of output 13 [2021-12-14 19:46:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:46:05,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:46:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:46:06,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863722983] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:46:06,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:46:06,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 15 [2021-12-14 19:46:06,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291500794] [2021-12-14 19:46:06,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:46:06,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 19:46:06,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:06,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 19:46:06,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:46:06,123 INFO L87 Difference]: Start difference. First operand 180 states and 206 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:06,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:06,595 INFO L93 Difference]: Finished difference Result 184 states and 203 transitions. [2021-12-14 19:46:06,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 19:46:06,595 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-14 19:46:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:06,596 INFO L225 Difference]: With dead ends: 184 [2021-12-14 19:46:06,596 INFO L226 Difference]: Without dead ends: 184 [2021-12-14 19:46:06,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-12-14 19:46:06,596 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 298 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:06,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 334 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:46:06,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-14 19:46:06,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 168. [2021-12-14 19:46:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 143 states have (on average 1.3216783216783217) internal successors, (189), 167 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 189 transitions. [2021-12-14 19:46:06,599 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 189 transitions. Word has length 34 [2021-12-14 19:46:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:06,599 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 189 transitions. [2021-12-14 19:46:06,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 189 transitions. [2021-12-14 19:46:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 19:46:06,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:06,600 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:46:06,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-14 19:46:06,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:46:06,807 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-14 19:46:06,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:06,808 INFO L85 PathProgramCache]: Analyzing trace with hash -605799936, now seen corresponding path program 1 times [2021-12-14 19:46:06,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:06,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906922827] [2021-12-14 19:46:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:06,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:06,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:06,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906922827] [2021-12-14 19:46:06,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906922827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:46:06,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714788589] [2021-12-14 19:46:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:06,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:46:06,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:46:06,967 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) [2021-12-14 19:46:06,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 19:46:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:07,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-14 19:46:07,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:46:07,237 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 19:46:07,237 INFO L388 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 [2021-12-14 19:46:07,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:46:07,390 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:46:07,390 INFO L388 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 [2021-12-14 19:46:07,495 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:46:07,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-14 19:46:07,517 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:46:07,517 INFO L388 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 [2021-12-14 19:46:07,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:46:07,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-14 19:46:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:07,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:46:08,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:46:08,022 INFO L388 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 38 treesize of output 31 [2021-12-14 19:46:08,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:46:08,031 INFO L388 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 252 treesize of output 227 [2021-12-14 19:46:08,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 204 [2021-12-14 19:46:08,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:46:08,047 INFO L388 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 204 treesize of output 196