./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/960521-1-3.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/memsafety/960521-1-3.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 c10f64ae1701d633846cd3dbd537781b9e2aef0b0b5befdebbc22e76d228933b --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:35:46,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:35:46,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:35:46,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:35:46,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:35:46,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:35:46,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:35:46,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:35:46,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:35:46,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:35:46,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:35:46,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:35:46,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:35:46,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:35:46,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:35:46,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:35:46,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:35:46,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:35:46,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:35:46,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:35:46,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:35:46,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:35:46,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:35:46,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:35:46,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:35:46,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:35:46,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:35:46,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:35:46,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:35:46,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:35:46,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:35:46,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:35:46,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:35:46,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:35:46,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:35:46,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:35:46,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:35:46,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:35:46,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:35:46,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:35:46,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:35:46,719 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:35:46,737 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:35:46,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:35:46,737 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:35:46,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:35:46,738 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:35:46,738 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:35:46,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:35:46,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:35:46,739 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:35:46,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:35:46,740 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:35:46,740 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:35:46,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:35:46,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:35:46,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:35:46,741 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:35:46,741 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:35:46,741 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:35:46,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:35:46,741 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:35:46,741 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:35:46,741 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:35:46,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:35:46,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:35:46,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:35:46,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:35:46,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:35:46,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:35:46,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:35:46,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:35:46,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:35:46,743 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10f64ae1701d633846cd3dbd537781b9e2aef0b0b5befdebbc22e76d228933b [2021-12-14 19:35:46,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:35:46,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:35:46,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:35:46,954 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:35:46,955 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:35:46,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-3.i [2021-12-14 19:35:47,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b65addf5f/c9d159852eb54d38b872309ee848c4af/FLAGfe264545a [2021-12-14 19:35:47,406 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:35:47,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-3.i [2021-12-14 19:35:47,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b65addf5f/c9d159852eb54d38b872309ee848c4af/FLAGfe264545a [2021-12-14 19:35:47,434 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b65addf5f/c9d159852eb54d38b872309ee848c4af [2021-12-14 19:35:47,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:35:47,439 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:35:47,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:35:47,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:35:47,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:35:47,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54191d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47, skipping insertion in model container [2021-12-14 19:35:47,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:35:47,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:35:47,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:35:47,738 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:35:47,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:35:47,791 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:35:47,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47 WrapperNode [2021-12-14 19:35:47,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:35:47,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:35:47,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:35:47,794 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:35:47,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,838 INFO L137 Inliner]: procedures = 121, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2021-12-14 19:35:47,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:35:47,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:35:47,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:35:47,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:35:47,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:35:47,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:35:47,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:35:47,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:35:47,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:35:47,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:47,899 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 19:35:47,916 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 19:35:47,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 19:35:47,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 19:35:47,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 19:35:47,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 19:35:47,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:35:47,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 19:35:47,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:35:47,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:35:48,034 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:35:48,036 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:35:48,166 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:35:48,170 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:35:48,171 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 19:35:48,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:35:48 BoogieIcfgContainer [2021-12-14 19:35:48,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:35:48,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:35:48,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:35:48,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:35:48,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:35:47" (1/3) ... [2021-12-14 19:35:48,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78acdb7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:35:48, skipping insertion in model container [2021-12-14 19:35:48,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (2/3) ... [2021-12-14 19:35:48,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78acdb7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:35:48, skipping insertion in model container [2021-12-14 19:35:48,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:35:48" (3/3) ... [2021-12-14 19:35:48,178 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1-3.i [2021-12-14 19:35:48,181 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:35:48,181 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-12-14 19:35:48,218 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:35:48,223 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 19:35:48,224 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-12-14 19:35:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:35:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-14 19:35:48,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:48,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-14 19:35:48,246 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-14 19:35:48,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:48,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192368372] [2021-12-14 19:35:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:48,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:48,366 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 19:35:48,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:48,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192368372] [2021-12-14 19:35:48,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192368372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:48,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:48,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:35:48,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784825503] [2021-12-14 19:35:48,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:48,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:35:48,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:48,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:35:48,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:35:48,391 INFO L87 Difference]: Start difference. First operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 19:35:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:48,460 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-12-14 19:35:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:35:48,462 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 19:35:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:48,468 INFO L225 Difference]: With dead ends: 50 [2021-12-14 19:35:48,468 INFO L226 Difference]: Without dead ends: 48 [2021-12-14 19:35:48,484 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 19:35:48,487 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:48,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:48,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-14 19:35:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-14 19:35:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:35:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-12-14 19:35:48,517 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 3 [2021-12-14 19:35:48,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:48,517 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-12-14 19:35:48,517 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 19:35:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-12-14 19:35:48,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-14 19:35:48,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:48,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-14 19:35:48,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 19:35:48,519 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:48,520 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-14 19:35:48,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:48,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589366783] [2021-12-14 19:35:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:48,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:48,597 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 19:35:48,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:48,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589366783] [2021-12-14 19:35:48,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589366783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:48,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:48,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:35:48,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277157547] [2021-12-14 19:35:48,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:48,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:35:48,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:48,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:35:48,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:35:48,602 INFO L87 Difference]: Start difference. First operand 48 states and 50 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 19:35:48,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:48,624 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-12-14 19:35:48,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:35:48,625 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 19:35:48,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:48,626 INFO L225 Difference]: With dead ends: 47 [2021-12-14 19:35:48,626 INFO L226 Difference]: Without dead ends: 47 [2021-12-14 19:35:48,626 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 19:35:48,630 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:48,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 87 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-14 19:35:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-14 19:35:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.75) internal successors, (49), 46 states have internal predecessors, (49), 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 19:35:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-12-14 19:35:48,641 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2021-12-14 19:35:48,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:48,641 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-12-14 19:35:48,641 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 19:35:48,641 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-12-14 19:35:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 19:35:48,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:48,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 19:35:48,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 19:35:48,644 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:48,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:48,645 INFO L85 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2021-12-14 19:35:48,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:48,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397838697] [2021-12-14 19:35:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:48,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:48,727 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 19:35:48,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:48,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397838697] [2021-12-14 19:35:48,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397838697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:48,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:48,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:35:48,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397966365] [2021-12-14 19:35:48,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:48,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:35:48,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:48,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:35:48,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:35:48,733 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:35:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:48,778 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-12-14 19:35:48,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:35:48,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-14 19:35:48,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:48,780 INFO L225 Difference]: With dead ends: 44 [2021-12-14 19:35:48,780 INFO L226 Difference]: Without dead ends: 44 [2021-12-14 19:35:48,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:35:48,781 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:48,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-14 19:35:48,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-14 19:35:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 43 states have internal predecessors, (46), 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 19:35:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-12-14 19:35:48,789 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2021-12-14 19:35:48,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:48,789 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-12-14 19:35:48,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:35:48,789 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-12-14 19:35:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 19:35:48,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:48,791 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 19:35:48,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 19:35:48,792 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:48,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:48,793 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2021-12-14 19:35:48,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:48,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633550851] [2021-12-14 19:35:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:48,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:48,871 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 19:35:48,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:48,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633550851] [2021-12-14 19:35:48,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633550851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:48,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:48,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:35:48,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358182612] [2021-12-14 19:35:48,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:48,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:35:48,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:48,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:35:48,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:35:48,874 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:35:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:48,927 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-12-14 19:35:48,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:35:48,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-14 19:35:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:48,928 INFO L225 Difference]: With dead ends: 50 [2021-12-14 19:35:48,928 INFO L226 Difference]: Without dead ends: 50 [2021-12-14 19:35:48,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:35:48,929 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:48,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 64 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-14 19:35:48,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-12-14 19:35:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:35:48,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-12-14 19:35:48,933 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 6 [2021-12-14 19:35:48,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:48,934 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-12-14 19:35:48,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:35:48,934 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-12-14 19:35:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 19:35:48,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:48,935 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:48,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 19:35:48,935 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:48,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:48,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2021-12-14 19:35:48,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:48,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659364618] [2021-12-14 19:35:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:48,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:49,040 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 19:35:49,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:49,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659364618] [2021-12-14 19:35:49,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659364618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:49,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830014220] [2021-12-14 19:35:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:49,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:49,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:49,069 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 19:35:49,075 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 19:35:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:49,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 19:35:49,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:49,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:35:49,190 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 9 treesize of output 11 [2021-12-14 19:35:49,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:35:49,283 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 19:35:49,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:49,382 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 19:35:49,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830014220] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:35:49,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:35:49,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2021-12-14 19:35:49,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901163143] [2021-12-14 19:35:49,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:49,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 19:35:49,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:49,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 19:35:49,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:35:49,384 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 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 19:35:49,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:49,552 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2021-12-14 19:35:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:35:49,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 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 19:35:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:49,558 INFO L225 Difference]: With dead ends: 92 [2021-12-14 19:35:49,558 INFO L226 Difference]: Without dead ends: 92 [2021-12-14 19:35:49,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:35:49,561 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 281 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:49,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 99 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:35:49,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-14 19:35:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 57. [2021-12-14 19:35:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 56 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:35:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-12-14 19:35:49,573 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 9 [2021-12-14 19:35:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:49,574 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-12-14 19:35:49,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 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 19:35:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-12-14 19:35:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 19:35:49,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:49,575 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2021-12-14 19:35:49,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 19:35:49,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:49,792 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:49,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1941957673, now seen corresponding path program 2 times [2021-12-14 19:35:49,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:49,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341494529] [2021-12-14 19:35:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:49,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:49,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:49,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341494529] [2021-12-14 19:35:49,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341494529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:49,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053555981] [2021-12-14 19:35:49,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:35:49,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:49,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:49,909 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 19:35:49,939 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 19:35:49,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:35:49,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:35:49,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 19:35:49,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:49,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:35:49,979 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 9 treesize of output 11 [2021-12-14 19:35:49,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:35:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:50,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:50,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053555981] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:35:50,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:35:50,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2021-12-14 19:35:50,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655634850] [2021-12-14 19:35:50,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:50,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 19:35:50,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 19:35:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-12-14 19:35:50,513 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:35:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:50,872 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2021-12-14 19:35:50,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:35:50,873 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-14 19:35:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:50,873 INFO L225 Difference]: With dead ends: 197 [2021-12-14 19:35:50,873 INFO L226 Difference]: Without dead ends: 197 [2021-12-14 19:35:50,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 19:35:50,874 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1125 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:50,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1125 Valid, 203 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:35:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-14 19:35:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 55. [2021-12-14 19:35:50,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 54 states have internal predecessors, (59), 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 19:35:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-12-14 19:35:50,878 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 18 [2021-12-14 19:35:50,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:50,879 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-12-14 19:35:50,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:35:50,879 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-12-14 19:35:50,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:35:50,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:50,880 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:50,915 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 19:35:51,096 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,SelfDestructingSolverStorable5 [2021-12-14 19:35:51,096 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:51,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2089502829, now seen corresponding path program 1 times [2021-12-14 19:35:51,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:51,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613880167] [2021-12-14 19:35:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:51,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 19:35:51,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:51,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613880167] [2021-12-14 19:35:51,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613880167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:51,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:51,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:35:51,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661006035] [2021-12-14 19:35:51,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:51,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:35:51,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:51,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:35:51,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:35:51,138 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 19:35:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:51,165 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-12-14 19:35:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:35:51,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 19:35:51,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:51,166 INFO L225 Difference]: With dead ends: 53 [2021-12-14 19:35:51,166 INFO L226 Difference]: Without dead ends: 53 [2021-12-14 19:35:51,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:35:51,167 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:51,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 59 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-14 19:35:51,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-14 19:35:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 52 states have internal predecessors, (56), 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 19:35:51,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-12-14 19:35:51,170 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 20 [2021-12-14 19:35:51,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:51,170 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-12-14 19:35:51,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 19:35:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-12-14 19:35:51,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:35:51,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:51,171 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:51,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 19:35:51,171 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:51,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2089502828, now seen corresponding path program 1 times [2021-12-14 19:35:51,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:51,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359305363] [2021-12-14 19:35:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:51,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:51,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:51,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359305363] [2021-12-14 19:35:51,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359305363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:51,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432160761] [2021-12-14 19:35:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:51,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:51,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:51,217 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 19:35:51,222 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 19:35:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:51,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 19:35:51,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:51,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:51,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432160761] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:35:51,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:35:51,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2021-12-14 19:35:51,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78522581] [2021-12-14 19:35:51,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:51,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 19:35:51,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:51,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 19:35:51,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2021-12-14 19:35:51,416 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:35:51,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:51,559 INFO L93 Difference]: Finished difference Result 208 states and 214 transitions. [2021-12-14 19:35:51,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:35:51,559 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-14 19:35:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:51,560 INFO L225 Difference]: With dead ends: 208 [2021-12-14 19:35:51,560 INFO L226 Difference]: Without dead ends: 208 [2021-12-14 19:35:51,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:35:51,561 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 458 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:51,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 254 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:35:51,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-14 19:35:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 80. [2021-12-14 19:35:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 79 states have internal predecessors, (86), 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 19:35:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-12-14 19:35:51,565 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 20 [2021-12-14 19:35:51,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:51,565 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-12-14 19:35:51,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:35:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-12-14 19:35:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 19:35:51,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:51,566 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:51,583 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 19:35:51,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:51,783 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:51,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:51,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1489931692, now seen corresponding path program 2 times [2021-12-14 19:35:51,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:51,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978564169] [2021-12-14 19:35:51,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:51,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:51,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:51,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978564169] [2021-12-14 19:35:51,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978564169] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:51,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46011664] [2021-12-14 19:35:51,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:35:51,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:51,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:51,887 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 19:35:51,890 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 19:35:51,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 19:35:51,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:35:51,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:35:51,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:51,952 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:35:51,953 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:35:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-14 19:35:52,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:35:52,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46011664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:52,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:35:52,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 16 [2021-12-14 19:35:52,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050650319] [2021-12-14 19:35:52,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:52,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:35:52,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:35:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-12-14 19:35:52,089 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 19:35:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:52,106 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2021-12-14 19:35:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:35:52,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 38 [2021-12-14 19:35:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:52,108 INFO L225 Difference]: With dead ends: 56 [2021-12-14 19:35:52,108 INFO L226 Difference]: Without dead ends: 56 [2021-12-14 19:35:52,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-12-14 19:35:52,110 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:52,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:52,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-14 19:35:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-14 19:35:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 55 states have internal predecessors, (60), 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 19:35:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-12-14 19:35:52,116 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 38 [2021-12-14 19:35:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:52,116 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-12-14 19:35:52,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 19:35:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-12-14 19:35:52,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 19:35:52,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:52,119 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:52,135 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 19:35:52,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:52,320 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:52,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:52,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1931943797, now seen corresponding path program 1 times [2021-12-14 19:35:52,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:52,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023502366] [2021-12-14 19:35:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:52,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:35:52,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:52,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023502366] [2021-12-14 19:35:52,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023502366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:52,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687378657] [2021-12-14 19:35:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:52,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:52,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:52,437 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 19:35:52,438 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 19:35:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 19:35:52,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:35:52,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:35:52,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687378657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:35:52,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:35:52,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2021-12-14 19:35:52,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542034091] [2021-12-14 19:35:52,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:52,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 19:35:52,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 19:35:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 19:35:52,904 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 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 19:35:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:53,244 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2021-12-14 19:35:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 19:35:53,244 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 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 41 [2021-12-14 19:35:53,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:53,245 INFO L225 Difference]: With dead ends: 189 [2021-12-14 19:35:53,245 INFO L226 Difference]: Without dead ends: 189 [2021-12-14 19:35:53,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2021-12-14 19:35:53,246 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 528 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:53,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 38 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:35:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-14 19:35:53,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 110. [2021-12-14 19:35:53,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 108 states have (on average 1.1111111111111112) internal successors, (120), 109 states have internal predecessors, (120), 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 19:35:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2021-12-14 19:35:53,249 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 41 [2021-12-14 19:35:53,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:53,250 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2021-12-14 19:35:53,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 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 19:35:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2021-12-14 19:35:53,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 19:35:53,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:53,251 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:53,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 19:35:53,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 19:35:53,467 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:53,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:53,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1022801419, now seen corresponding path program 2 times [2021-12-14 19:35:53,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:53,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562781205] [2021-12-14 19:35:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:53,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:35:53,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:53,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562781205] [2021-12-14 19:35:53,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562781205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:53,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370308655] [2021-12-14 19:35:53,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:35:53,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:53,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:53,764 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 19:35:53,765 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 19:35:53,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:35:53,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:35:53,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 19:35:53,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:35:54,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:35:55,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370308655] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:35:55,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:35:55,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 73 [2021-12-14 19:35:55,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278442800] [2021-12-14 19:35:55,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:55,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-14 19:35:55,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:55,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-14 19:35:55,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=2949, Unknown=0, NotChecked=0, Total=5256 [2021-12-14 19:35:55,012 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 73 states have internal predecessors, (214), 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 19:35:56,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:56,063 INFO L93 Difference]: Finished difference Result 393 states and 394 transitions. [2021-12-14 19:35:56,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-14 19:35:56,064 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 73 states have internal predecessors, (214), 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 77 [2021-12-14 19:35:56,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:56,065 INFO L225 Difference]: With dead ends: 393 [2021-12-14 19:35:56,065 INFO L226 Difference]: Without dead ends: 393 [2021-12-14 19:35:56,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3217 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3480, Invalid=5640, Unknown=0, NotChecked=0, Total=9120 [2021-12-14 19:35:56,068 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1356 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:56,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 61 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 19:35:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-14 19:35:56,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 218. [2021-12-14 19:35:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 216 states have (on average 1.1111111111111112) internal successors, (240), 217 states have internal predecessors, (240), 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 19:35:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 240 transitions. [2021-12-14 19:35:56,073 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 240 transitions. Word has length 77 [2021-12-14 19:35:56,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:56,073 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 240 transitions. [2021-12-14 19:35:56,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 73 states have internal predecessors, (214), 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 19:35:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 240 transitions. [2021-12-14 19:35:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-14 19:35:56,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:56,075 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:56,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 19:35:56,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:56,293 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:56,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1581506293, now seen corresponding path program 3 times [2021-12-14 19:35:56,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:56,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544551486] [2021-12-14 19:35:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:56,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3153 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:35:57,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:57,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544551486] [2021-12-14 19:35:57,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544551486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:57,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658289517] [2021-12-14 19:35:57,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:35:57,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:57,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:57,223 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:35:57,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 19:35:57,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 19:35:57,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:35:57,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 19:35:57,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:57,345 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:35:57,346 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:35:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3153 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-12-14 19:35:57,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:35:57,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658289517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:57,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:35:57,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [50] total 54 [2021-12-14 19:35:57,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423095713] [2021-12-14 19:35:57,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:57,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:35:57,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:57,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:35:57,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1193, Invalid=1669, Unknown=0, NotChecked=0, Total=2862 [2021-12-14 19:35:57,977 INFO L87 Difference]: Start difference. First operand 218 states and 240 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:35:58,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:58,008 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2021-12-14 19:35:58,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:35:58,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-12-14 19:35:58,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:58,009 INFO L225 Difference]: With dead ends: 217 [2021-12-14 19:35:58,009 INFO L226 Difference]: Without dead ends: 217 [2021-12-14 19:35:58,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1193, Invalid=1669, Unknown=0, NotChecked=0, Total=2862 [2021-12-14 19:35:58,010 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:58,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:58,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-14 19:35:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-12-14 19:35:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0092592592592593) internal successors, (218), 216 states have internal predecessors, (218), 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 19:35:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2021-12-14 19:35:58,014 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 149 [2021-12-14 19:35:58,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:58,014 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2021-12-14 19:35:58,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:35:58,014 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2021-12-14 19:35:58,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-14 19:35:58,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:58,016 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:58,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 19:35:58,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:58,235 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:58,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:58,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1819445970, now seen corresponding path program 1 times [2021-12-14 19:35:58,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:58,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775274292] [2021-12-14 19:35:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:58,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3933 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-12-14 19:35:59,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:59,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775274292] [2021-12-14 19:35:59,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775274292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:59,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500368636] [2021-12-14 19:35:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:59,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:59,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:59,098 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:35:59,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 19:35:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:59,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-14 19:35:59,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:36:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3933 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-12-14 19:36:00,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:36:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3933 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-12-14 19:36:03,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500368636] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:36:03,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:36:03,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 145 [2021-12-14 19:36:03,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031483985] [2021-12-14 19:36:03,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:36:03,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-12-14 19:36:03,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:36:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-12-14 19:36:03,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9219, Invalid=11661, Unknown=0, NotChecked=0, Total=20880 [2021-12-14 19:36:03,016 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 145 states, 145 states have (on average 2.9793103448275864) internal successors, (432), 145 states have internal predecessors, (432), 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 19:36:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:36:06,614 INFO L93 Difference]: Finished difference Result 709 states and 710 transitions. [2021-12-14 19:36:06,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-14 19:36:06,615 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.9793103448275864) internal successors, (432), 145 states have internal predecessors, (432), 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 216 [2021-12-14 19:36:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:36:06,617 INFO L225 Difference]: With dead ends: 709 [2021-12-14 19:36:06,617 INFO L226 Difference]: Without dead ends: 709 [2021-12-14 19:36:06,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13345 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13872, Invalid=22800, Unknown=0, NotChecked=0, Total=36672 [2021-12-14 19:36:06,623 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2594 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2594 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 19:36:06,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2594 Valid, 121 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 19:36:06,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-12-14 19:36:06,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 433. [2021-12-14 19:36:06,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.0046296296296295) internal successors, (434), 432 states have internal predecessors, (434), 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 19:36:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 434 transitions. [2021-12-14 19:36:06,629 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 434 transitions. Word has length 216 [2021-12-14 19:36:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:36:06,629 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 434 transitions. [2021-12-14 19:36:06,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.9793103448275864) internal successors, (432), 145 states have internal predecessors, (432), 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 19:36:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 434 transitions. [2021-12-14 19:36:06,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2021-12-14 19:36:06,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:36:06,633 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:36:06,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 19:36:06,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 19:36:06,851 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:36:06,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:36:06,851 INFO L85 PathProgramCache]: Analyzing trace with hash -484958290, now seen corresponding path program 2 times [2021-12-14 19:36:06,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:36:06,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253484749] [2021-12-14 19:36:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:36:06,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:36:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:36:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16497 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 3290 trivial. 0 not checked. [2021-12-14 19:36:09,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:36:09,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253484749] [2021-12-14 19:36:09,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253484749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:36:09,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841539828] [2021-12-14 19:36:09,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:36:09,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:36:09,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:36:09,918 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:36:09,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 19:36:10,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:36:10,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:36:10,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-14 19:36:10,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:36:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16497 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 3290 trivial. 0 not checked. [2021-12-14 19:36:14,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:36:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16497 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 3290 trivial. 0 not checked. [2021-12-14 19:36:17,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841539828] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:36:17,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:36:17,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 227 [2021-12-14 19:36:17,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143377320] [2021-12-14 19:36:17,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:36:17,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 227 states [2021-12-14 19:36:17,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:36:17,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 227 interpolants. [2021-12-14 19:36:17,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21026, Invalid=30276, Unknown=0, NotChecked=0, Total=51302 [2021-12-14 19:36:17,279 INFO L87 Difference]: Start difference. First operand 433 states and 434 transitions. Second operand has 227 states, 227 states have (on average 3.0) internal successors, (681), 227 states have internal predecessors, (681), 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 19:36:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:36:24,479 INFO L93 Difference]: Finished difference Result 871 states and 872 transitions. [2021-12-14 19:36:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-12-14 19:36:24,480 INFO L78 Accepts]: Start accepts. Automaton has has 227 states, 227 states have (on average 3.0) internal successors, (681), 227 states have internal predecessors, (681), 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 432 [2021-12-14 19:36:24,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:36:24,482 INFO L225 Difference]: With dead ends: 871 [2021-12-14 19:36:24,482 INFO L226 Difference]: Without dead ends: 871 [2021-12-14 19:36:24,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 734 SyntacticMatches, 1 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28893 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=25415, Invalid=41925, Unknown=0, NotChecked=0, Total=67340 [2021-12-14 19:36:24,485 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2768 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2768 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 19:36:24,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2768 Valid, 88 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 19:36:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-12-14 19:36:24,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 679. [2021-12-14 19:36:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 1.0029498525073746) internal successors, (680), 678 states have internal predecessors, (680), 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 19:36:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 680 transitions. [2021-12-14 19:36:24,493 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 680 transitions. Word has length 432 [2021-12-14 19:36:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:36:24,493 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 680 transitions. [2021-12-14 19:36:24,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 227 states, 227 states have (on average 3.0) internal successors, (681), 227 states have internal predecessors, (681), 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 19:36:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 680 transitions. [2021-12-14 19:36:24,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2021-12-14 19:36:24,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:36:24,502 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:36:24,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 19:36:24,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 19:36:24,718 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:36:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:36:24,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1231832338, now seen corresponding path program 3 times [2021-12-14 19:36:24,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:36:24,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406242202] [2021-12-14 19:36:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:36:24,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:36:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:36:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 38002 backedges. 0 proven. 13490 refuted. 0 times theorem prover too weak. 24512 trivial. 0 not checked. [2021-12-14 19:36:27,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:36:27,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406242202] [2021-12-14 19:36:27,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406242202] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:36:27,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944899507] [2021-12-14 19:36:27,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:36:27,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:36:27,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:36:27,649 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:36:27,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process