./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/array-memsafety/cstrlen-alloca-2.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 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:35:27,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:35:27,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:35:27,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:35:27,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:35:27,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:35:27,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:35:27,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:35:27,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:35:27,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:35:27,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:35:27,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:35:27,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:35:27,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:35:27,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:35:27,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:35:27,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:35:27,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:35:27,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:35:27,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:35:27,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:35:27,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:35:27,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:35:27,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:35:27,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:35:27,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:35:27,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:35:27,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:35:27,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:35:27,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:35:27,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:35:27,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:35:27,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:35:27,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:35:27,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:35:27,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:35:27,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:35:27,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:35:27,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:35:27,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:35:27,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:35:27,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 19:35:27,765 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:35:27,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:35:27,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:35:27,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:35:27,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:35:27,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:35:27,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:35:27,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:35:27,771 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:35:27,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:35:27,772 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:35:27,772 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:35:27,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:35:27,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:35:27,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:35:27,772 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:35:27,772 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:35:27,773 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 19:35:27,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:35:27,773 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:35:27,773 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:35:27,773 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:35:27,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:35:27,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:35:27,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:35:27,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:35:27,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:35:27,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:35:27,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:35:27,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:35:27,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:35:27,775 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 [2021-12-18 19:35:27,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:35:27,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:35:27,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:35:27,951 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:35:27,951 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:35:27,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-12-18 19:35:27,991 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/344351607/673f143478314e67bc7eeaf10d518a01/FLAGaad426f16 [2021-12-18 19:35:28,380 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:35:28,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-12-18 19:35:28,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/344351607/673f143478314e67bc7eeaf10d518a01/FLAGaad426f16 [2021-12-18 19:35:28,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/344351607/673f143478314e67bc7eeaf10d518a01 [2021-12-18 19:35:28,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:35:28,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:35:28,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:35:28,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:35:28,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:35:28,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:35:28" (1/1) ... [2021-12-18 19:35:28,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770c7a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:28, skipping insertion in model container [2021-12-18 19:35:28,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:35:28" (1/1) ... [2021-12-18 19:35:28,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:35:28,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:35:28,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:35:28,675 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:35:28,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:35:28,737 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:35:28,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:28 WrapperNode [2021-12-18 19:35:28,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:35:28,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:35:28,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:35:28,740 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:35:28,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:28" (1/1) ... [2021-12-18 19:35:28,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:28" (1/1) ... [2021-12-18 19:35:28,787 INFO L137 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2021-12-18 19:35:28,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:35:28,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:35:28,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:35:28,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:35:28,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:28" (1/1) ... [2021-12-18 19:35:28,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:28" (1/1) ... [2021-12-18 19:35:28,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:28" (1/1) ... [2021-12-18 19:35:28,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:28" (1/1) ... [2021-12-18 19:35:28,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:28" (1/1) ... [2021-12-18 19:35:28,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:28" (1/1) ... [2021-12-18 19:35:28,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:28" (1/1) ... [2021-12-18 19:35:28,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:35:28,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:35:28,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:35:28,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:35:28,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:28" (1/1) ... [2021-12-18 19:35:28,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:35:28,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:28,881 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) [2021-12-18 19:35:28,888 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 [2021-12-18 19:35:28,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 19:35:28,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 19:35:28,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 19:35:28,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:35:28,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:35:28,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:35:28,964 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:35:28,965 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:35:29,083 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:35:29,087 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:35:29,088 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-18 19:35:29,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:29 BoogieIcfgContainer [2021-12-18 19:35:29,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:35:29,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:35:29,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:35:29,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:35:29,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:35:28" (1/3) ... [2021-12-18 19:35:29,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0c1281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:35:29, skipping insertion in model container [2021-12-18 19:35:29,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:28" (2/3) ... [2021-12-18 19:35:29,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0c1281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:35:29, skipping insertion in model container [2021-12-18 19:35:29,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:29" (3/3) ... [2021-12-18 19:35:29,107 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2021-12-18 19:35:29,110 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:35:29,110 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-12-18 19:35:29,152 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:35:29,157 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 [2021-12-18 19:35:29,157 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-12-18 19:35:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-12-18 19:35:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:35:29,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:29,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:35:29,172 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:29,176 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-18 19:35:29,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:29,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778258367] [2021-12-18 19:35:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:29,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:29,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:29,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778258367] [2021-12-18 19:35:29,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778258367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:29,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:29,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:29,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106676357] [2021-12-18 19:35:29,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:29,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:29,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:29,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:29,414 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 23 states have internal predecessors, (28), 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 4 states, 4 states have (on average 1.5) 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) [2021-12-18 19:35:29,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:29,472 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-12-18 19:35:29,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:29,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) 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 [2021-12-18 19:35:29,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:29,479 INFO L225 Difference]: With dead ends: 40 [2021-12-18 19:35:29,479 INFO L226 Difference]: Without dead ends: 36 [2021-12-18 19:35:29,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:29,488 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:29,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 55 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:29,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-18 19:35:29,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2021-12-18 19:35:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-12-18 19:35:29,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 6 [2021-12-18 19:35:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:29,516 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-12-18 19:35:29,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) 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) [2021-12-18 19:35:29,516 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-12-18 19:35:29,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:35:29,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:29,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:35:29,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 19:35:29,517 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:29,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:29,520 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2021-12-18 19:35:29,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:29,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658301684] [2021-12-18 19:35:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:29,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:29,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:29,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658301684] [2021-12-18 19:35:29,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658301684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:29,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:29,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:35:29,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082728485] [2021-12-18 19:35:29,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:29,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:35:29,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:29,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:35:29,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:29,573 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-12-18 19:35:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:29,592 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-12-18 19:35:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:35:29,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2021-12-18 19:35:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:29,595 INFO L225 Difference]: With dead ends: 22 [2021-12-18 19:35:29,595 INFO L226 Difference]: Without dead ends: 22 [2021-12-18 19:35:29,596 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 [2021-12-18 19:35:29,600 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:29,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:29,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-18 19:35:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-18 19:35:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-12-18 19:35:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-18 19:35:29,604 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2021-12-18 19:35:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:29,605 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-18 19:35:29,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-12-18 19:35:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-18 19:35:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:35:29,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:29,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:35:29,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 19:35:29,607 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:29,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:29,610 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2021-12-18 19:35:29,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:29,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104578057] [2021-12-18 19:35:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:29,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:29,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:29,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104578057] [2021-12-18 19:35:29,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104578057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:29,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:29,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:29,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855543493] [2021-12-18 19:35:29,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:29,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:29,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:29,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:29,672 INFO L87 Difference]: Start difference. First operand 22 states and 24 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) [2021-12-18 19:35:29,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:29,697 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-12-18 19:35:29,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:29,698 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 [2021-12-18 19:35:29,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:29,699 INFO L225 Difference]: With dead ends: 21 [2021-12-18 19:35:29,699 INFO L226 Difference]: Without dead ends: 21 [2021-12-18 19:35:29,699 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 [2021-12-18 19:35:29,705 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:29,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 14 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-18 19:35:29,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-18 19:35:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 20 states have internal predecessors, (23), 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) [2021-12-18 19:35:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-12-18 19:35:29,712 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2021-12-18 19:35:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:29,712 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-12-18 19:35:29,712 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) [2021-12-18 19:35:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-12-18 19:35:29,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:35:29,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:29,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:35:29,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 19:35:29,714 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:29,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:29,715 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-18 19:35:29,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:29,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195422907] [2021-12-18 19:35:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:29,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:29,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:29,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195422907] [2021-12-18 19:35:29,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195422907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:29,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:29,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:29,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565973185] [2021-12-18 19:35:29,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:29,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:29,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:29,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:29,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:29,778 INFO L87 Difference]: Start difference. First operand 21 states and 23 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) [2021-12-18 19:35:29,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:29,818 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-12-18 19:35:29,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:29,819 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 [2021-12-18 19:35:29,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:29,820 INFO L225 Difference]: With dead ends: 35 [2021-12-18 19:35:29,820 INFO L226 Difference]: Without dead ends: 35 [2021-12-18 19:35:29,820 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 [2021-12-18 19:35:29,821 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:29,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 23 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:29,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-18 19:35:29,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2021-12-18 19:35:29,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-18 19:35:29,823 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2021-12-18 19:35:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:29,824 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-18 19:35:29,824 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) [2021-12-18 19:35:29,824 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-18 19:35:29,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 19:35:29,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:29,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:29,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 19:35:29,825 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:29,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:29,825 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2021-12-18 19:35:29,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:29,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822890676] [2021-12-18 19:35:29,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:29,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:29,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:29,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822890676] [2021-12-18 19:35:29,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822890676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:29,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:29,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:29,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085366131] [2021-12-18 19:35:29,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:29,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:29,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:29,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:29,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:29,875 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:29,904 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-12-18 19:35:29,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:29,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-18 19:35:29,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:29,907 INFO L225 Difference]: With dead ends: 22 [2021-12-18 19:35:29,907 INFO L226 Difference]: Without dead ends: 22 [2021-12-18 19:35:29,907 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 [2021-12-18 19:35:29,908 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:29,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:29,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-18 19:35:29,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-18 19:35:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 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) [2021-12-18 19:35:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-18 19:35:29,913 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2021-12-18 19:35:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:29,914 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-18 19:35:29,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-18 19:35:29,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 19:35:29,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:29,916 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:29,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 19:35:29,916 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:29,916 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2021-12-18 19:35:29,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:29,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312065395] [2021-12-18 19:35:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:29,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:29,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:29,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312065395] [2021-12-18 19:35:29,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312065395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:29,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:29,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:29,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150045693] [2021-12-18 19:35:29,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:29,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:29,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:29,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:29,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:29,972 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:30,012 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-12-18 19:35:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:30,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-18 19:35:30,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:30,013 INFO L225 Difference]: With dead ends: 28 [2021-12-18 19:35:30,014 INFO L226 Difference]: Without dead ends: 28 [2021-12-18 19:35:30,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:30,015 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 22 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 [2021-12-18 19:35:30,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 22 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-18 19:35:30,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-12-18 19:35:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-18 19:35:30,018 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2021-12-18 19:35:30,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:30,018 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-18 19:35:30,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,019 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-18 19:35:30,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:35:30,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:30,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:30,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 19:35:30,019 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:30,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:30,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1139876333, now seen corresponding path program 1 times [2021-12-18 19:35:30,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:30,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69108094] [2021-12-18 19:35:30,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:30,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:30,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:30,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69108094] [2021-12-18 19:35:30,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69108094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:30,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:30,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 19:35:30,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521562182] [2021-12-18 19:35:30,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:30,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:35:30,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:30,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:35:30,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:30,105 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2021-12-18 19:35:30,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:30,171 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-12-18 19:35:30,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:35:30,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 10 [2021-12-18 19:35:30,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:30,172 INFO L225 Difference]: With dead ends: 31 [2021-12-18 19:35:30,172 INFO L226 Difference]: Without dead ends: 31 [2021-12-18 19:35:30,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:35:30,173 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:30,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 71 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:30,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-18 19:35:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-12-18 19:35:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-18 19:35:30,176 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2021-12-18 19:35:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:30,176 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-18 19:35:30,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2021-12-18 19:35:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-18 19:35:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:35:30,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:30,177 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:30,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 19:35:30,177 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:30,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:30,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-18 19:35:30,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:30,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868462397] [2021-12-18 19:35:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:30,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:30,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:30,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868462397] [2021-12-18 19:35:30,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868462397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:30,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709327673] [2021-12-18 19:35:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:30,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:30,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:30,243 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) [2021-12-18 19:35:30,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 19:35:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:30,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:35:30,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:30,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:35:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:30,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:30,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709327673] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:30,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:30,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-18 19:35:30,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56709089] [2021-12-18 19:35:30,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:30,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:35:30,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:30,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:35:30,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:35:30,564 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:30,651 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-12-18 19:35:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:35:30,652 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-18 19:35:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:30,652 INFO L225 Difference]: With dead ends: 49 [2021-12-18 19:35:30,652 INFO L226 Difference]: Without dead ends: 49 [2021-12-18 19:35:30,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:35:30,653 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:30,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 71 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-18 19:35:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 24. [2021-12-18 19:35:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-12-18 19:35:30,656 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2021-12-18 19:35:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:30,656 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-12-18 19:35:30,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,656 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-12-18 19:35:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:35:30,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:30,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:30,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:30,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:30,874 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:30,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1949222959, now seen corresponding path program 1 times [2021-12-18 19:35:30,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:30,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902305383] [2021-12-18 19:35:30,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:30,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:30,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:30,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902305383] [2021-12-18 19:35:30,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902305383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:30,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:30,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 19:35:30,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462052953] [2021-12-18 19:35:30,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:30,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:35:30,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:30,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:35:30,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:35:30,999 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-12-18 19:35:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:31,052 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-12-18 19:35:31,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:35:31,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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 10 [2021-12-18 19:35:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:31,053 INFO L225 Difference]: With dead ends: 36 [2021-12-18 19:35:31,053 INFO L226 Difference]: Without dead ends: 36 [2021-12-18 19:35:31,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:35:31,054 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:31,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 53 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-18 19:35:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2021-12-18 19:35:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 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) [2021-12-18 19:35:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-18 19:35:31,056 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2021-12-18 19:35:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:31,057 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-18 19:35:31,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-12-18 19:35:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-18 19:35:31,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 19:35:31,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:31,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:31,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-18 19:35:31,058 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:31,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:31,058 INFO L85 PathProgramCache]: Analyzing trace with hash -204544928, now seen corresponding path program 1 times [2021-12-18 19:35:31,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:31,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531474218] [2021-12-18 19:35:31,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:31,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:31,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:31,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531474218] [2021-12-18 19:35:31,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531474218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:31,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:31,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:31,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924618613] [2021-12-18 19:35:31,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:31,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:31,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:31,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:31,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:31,098 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:31,107 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-12-18 19:35:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:31,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-18 19:35:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:31,108 INFO L225 Difference]: With dead ends: 24 [2021-12-18 19:35:31,108 INFO L226 Difference]: Without dead ends: 15 [2021-12-18 19:35:31,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:31,108 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:31,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:31,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-18 19:35:31,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-18 19:35:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-12-18 19:35:31,111 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-12-18 19:35:31,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:31,111 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-12-18 19:35:31,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,112 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-12-18 19:35:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 19:35:31,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:31,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:31,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 19:35:31,113 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:31,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1346179180, now seen corresponding path program 1 times [2021-12-18 19:35:31,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:31,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280363865] [2021-12-18 19:35:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:31,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:31,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:31,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280363865] [2021-12-18 19:35:31,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280363865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:31,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328954944] [2021-12-18 19:35:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:31,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:31,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:31,206 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) [2021-12-18 19:35:31,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 19:35:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:31,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 19:35:31,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:31,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:31,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:35:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:31,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328954944] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:31,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:31,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-12-18 19:35:31,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865846919] [2021-12-18 19:35:31,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:31,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 19:35:31,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:31,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 19:35:31,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-18 19:35:31,414 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 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) [2021-12-18 19:35:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:31,494 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-12-18 19:35:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:35:31,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-18 19:35:31,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:31,496 INFO L225 Difference]: With dead ends: 21 [2021-12-18 19:35:31,496 INFO L226 Difference]: Without dead ends: 21 [2021-12-18 19:35:31,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:35:31,497 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:31,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 26 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:31,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-18 19:35:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-12-18 19:35:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-12-18 19:35:31,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-12-18 19:35:31,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:31,502 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-12-18 19:35:31,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 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) [2021-12-18 19:35:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-12-18 19:35:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 19:35:31,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:31,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:31,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:31,721 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,SelfDestructingSolverStorable10 [2021-12-18 19:35:31,722 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:31,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:31,722 INFO L85 PathProgramCache]: Analyzing trace with hash -893036467, now seen corresponding path program 2 times [2021-12-18 19:35:31,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:31,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951350963] [2021-12-18 19:35:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:31,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:31,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:31,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951350963] [2021-12-18 19:35:31,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951350963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:31,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31402502] [2021-12-18 19:35:31,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:35:31,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:31,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:31,879 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) [2021-12-18 19:35:31,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 19:35:31,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:35:31,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:31,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 19:35:31,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:31,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:32,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:32,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 19:35:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:32,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:32,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:35:32,398 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 26 treesize of output 22 [2021-12-18 19:35:32,402 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 35 treesize of output 27 [2021-12-18 19:35:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:32,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31402502] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:32,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:32,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2021-12-18 19:35:32,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637831293] [2021-12-18 19:35:32,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:32,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 19:35:32,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:32,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 19:35:32,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-12-18 19:35:32,438 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 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) [2021-12-18 19:35:32,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:32,726 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-12-18 19:35:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:35:32,726 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-18 19:35:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:32,727 INFO L225 Difference]: With dead ends: 33 [2021-12-18 19:35:32,727 INFO L226 Difference]: Without dead ends: 27 [2021-12-18 19:35:32,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 19:35:32,728 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:32,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 49 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 130 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2021-12-18 19:35:32,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-18 19:35:32,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-12-18 19:35:32,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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) [2021-12-18 19:35:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-12-18 19:35:32,731 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2021-12-18 19:35:32,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:32,731 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-12-18 19:35:32,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 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) [2021-12-18 19:35:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-12-18 19:35:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 19:35:32,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:32,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:32,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:32,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:32,939 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1388594295, now seen corresponding path program 3 times [2021-12-18 19:35:32,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:32,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808816236] [2021-12-18 19:35:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:32,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:33,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:33,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808816236] [2021-12-18 19:35:33,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808816236] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:33,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841582100] [2021-12-18 19:35:33,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:35:33,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:33,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:33,063 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) [2021-12-18 19:35:33,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 19:35:33,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:35:33,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:33,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 19:35:33,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:33,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:33,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:35:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:33,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:33,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:35:33,356 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 26 treesize of output 22 [2021-12-18 19:35:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:33,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841582100] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:33,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:33,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-18 19:35:33,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552026283] [2021-12-18 19:35:33,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:33,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 19:35:33,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:33,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 19:35:33,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-12-18 19:35:33,452 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 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) [2021-12-18 19:35:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:33,624 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-12-18 19:35:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:35:33,625 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-18 19:35:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:33,625 INFO L225 Difference]: With dead ends: 38 [2021-12-18 19:35:33,625 INFO L226 Difference]: Without dead ends: 30 [2021-12-18 19:35:33,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:35:33,626 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:33,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 77 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 165 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-12-18 19:35:33,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-18 19:35:33,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-12-18 19:35:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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) [2021-12-18 19:35:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-12-18 19:35:33,628 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2021-12-18 19:35:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:33,628 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-12-18 19:35:33,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 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) [2021-12-18 19:35:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-12-18 19:35:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 19:35:33,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:33,629 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:33,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:33,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:33,848 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:33,848 INFO L85 PathProgramCache]: Analyzing trace with hash -954145076, now seen corresponding path program 4 times [2021-12-18 19:35:33,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:33,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543132112] [2021-12-18 19:35:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:33,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:33,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:33,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543132112] [2021-12-18 19:35:33,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543132112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:33,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496640954] [2021-12-18 19:35:33,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:35:33,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:33,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:33,974 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) [2021-12-18 19:35:33,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 19:35:34,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:35:34,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:34,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 19:35:34,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:34,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:35:34,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:35:34,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:34,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-18 19:35:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:34,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:34,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:35:34,524 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 26 treesize of output 22 [2021-12-18 19:35:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:34,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496640954] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:34,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:34,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2021-12-18 19:35:34,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113850535] [2021-12-18 19:35:34,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:34,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 19:35:34,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:34,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 19:35:34,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:35:34,919 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 31 states have internal predecessors, (68), 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) [2021-12-18 19:35:35,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:35,356 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-12-18 19:35:35,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 19:35:35,356 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-18 19:35:35,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:35,357 INFO L225 Difference]: With dead ends: 32 [2021-12-18 19:35:35,357 INFO L226 Difference]: Without dead ends: 32 [2021-12-18 19:35:35,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2021-12-18 19:35:35,359 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 64 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:35,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 70 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 237 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2021-12-18 19:35:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-18 19:35:35,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-12-18 19:35:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 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) [2021-12-18 19:35:35,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-12-18 19:35:35,361 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2021-12-18 19:35:35,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:35,361 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-12-18 19:35:35,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 31 states have internal predecessors, (68), 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) [2021-12-18 19:35:35,361 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-12-18 19:35:35,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 19:35:35,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:35,362 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:35,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:35,585 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,SelfDestructingSolverStorable13 [2021-12-18 19:35:35,585 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:35,585 INFO L85 PathProgramCache]: Analyzing trace with hash -344976898, now seen corresponding path program 5 times [2021-12-18 19:35:35,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:35,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597475971] [2021-12-18 19:35:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:35,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:35,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:35,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597475971] [2021-12-18 19:35:35,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597475971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:35,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212355169] [2021-12-18 19:35:35,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:35:35,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:35,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:35,712 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) [2021-12-18 19:35:35,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 19:35:35,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-18 19:35:35,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:35,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 19:35:35,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:35,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:35:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:36,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:36,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212355169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:36,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:36,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2021-12-18 19:35:36,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800684742] [2021-12-18 19:35:36,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:36,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 19:35:36,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:36,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 19:35:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-12-18 19:35:36,231 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:36,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:36,377 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-12-18 19:35:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 19:35:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-18 19:35:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:36,378 INFO L225 Difference]: With dead ends: 49 [2021-12-18 19:35:36,378 INFO L226 Difference]: Without dead ends: 38 [2021-12-18 19:35:36,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:35:36,380 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:36,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 43 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:36,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-18 19:35:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-18 19:35:36,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 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) [2021-12-18 19:35:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-12-18 19:35:36,383 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2021-12-18 19:35:36,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:36,383 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-12-18 19:35:36,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:36,383 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-12-18 19:35:36,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 19:35:36,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:36,384 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:36,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:36,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-18 19:35:36,601 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:36,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:36,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1662825919, now seen corresponding path program 6 times [2021-12-18 19:35:36,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:36,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904679852] [2021-12-18 19:35:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:36,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:36,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:36,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904679852] [2021-12-18 19:35:36,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904679852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:36,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397141128] [2021-12-18 19:35:36,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:35:36,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:36,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:36,808 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) [2021-12-18 19:35:36,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 19:35:36,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-18 19:35:36,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:36,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 19:35:36,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:37,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:37,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:35:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:37,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:37,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:35:37,346 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 26 treesize of output 22 [2021-12-18 19:35:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:37,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397141128] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:37,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:37,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2021-12-18 19:35:37,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020299356] [2021-12-18 19:35:37,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:37,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 19:35:37,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 19:35:37,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 19:35:37,687 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:38,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:38,118 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-12-18 19:35:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 19:35:38,119 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-18 19:35:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:38,119 INFO L225 Difference]: With dead ends: 54 [2021-12-18 19:35:38,119 INFO L226 Difference]: Without dead ends: 42 [2021-12-18 19:35:38,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2021-12-18 19:35:38,120 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:38,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 165 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 504 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2021-12-18 19:35:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-18 19:35:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-12-18 19:35:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 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) [2021-12-18 19:35:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-12-18 19:35:38,123 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2021-12-18 19:35:38,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:38,124 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-12-18 19:35:38,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:38,124 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-12-18 19:35:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-18 19:35:38,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:38,125 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:38,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-18 19:35:38,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:38,342 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:38,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1974118660, now seen corresponding path program 7 times [2021-12-18 19:35:38,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:38,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982922222] [2021-12-18 19:35:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:38,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:38,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:38,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982922222] [2021-12-18 19:35:38,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982922222] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:38,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527420732] [2021-12-18 19:35:38,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:35:38,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:38,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:38,504 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) [2021-12-18 19:35:38,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 19:35:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:38,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-18 19:35:38,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:38,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:38,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:35:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:38,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527420732] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:38,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:38,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 30 [2021-12-18 19:35:38,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973075214] [2021-12-18 19:35:38,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:38,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 19:35:38,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:38,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 19:35:38,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:35:38,958 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:39,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:39,322 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-12-18 19:35:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 19:35:39,331 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-18 19:35:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:39,332 INFO L225 Difference]: With dead ends: 42 [2021-12-18 19:35:39,332 INFO L226 Difference]: Without dead ends: 42 [2021-12-18 19:35:39,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 19:35:39,333 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 80 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:39,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 142 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:35:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-18 19:35:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-18 19:35:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 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) [2021-12-18 19:35:39,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-12-18 19:35:39,335 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2021-12-18 19:35:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:39,335 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-12-18 19:35:39,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-12-18 19:35:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 19:35:39,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:39,336 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:39,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:39,552 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,SelfDestructingSolverStorable16 [2021-12-18 19:35:39,552 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:39,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1247513155, now seen corresponding path program 8 times [2021-12-18 19:35:39,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:39,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301140391] [2021-12-18 19:35:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:39,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:39,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:39,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301140391] [2021-12-18 19:35:39,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301140391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:39,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967113965] [2021-12-18 19:35:39,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:35:39,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:39,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:39,734 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) [2021-12-18 19:35:39,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 19:35:39,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:35:39,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:39,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 19:35:39,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:39,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:40,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:40,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 19:35:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:40,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:40,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:35:40,940 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 15 treesize of output 11 [2021-12-18 19:35:40,944 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 26 treesize of output 22 [2021-12-18 19:35:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:40,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967113965] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:40,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:40,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2021-12-18 19:35:40,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582144739] [2021-12-18 19:35:40,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:40,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 19:35:40,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 19:35:40,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1729, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 19:35:40,994 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:41,662 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2021-12-18 19:35:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 19:35:41,663 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-18 19:35:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:41,663 INFO L225 Difference]: With dead ends: 65 [2021-12-18 19:35:41,663 INFO L226 Difference]: Without dead ends: 51 [2021-12-18 19:35:41,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=298, Invalid=2894, Unknown=0, NotChecked=0, Total=3192 [2021-12-18 19:35:41,664 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:41,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 185 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 477 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2021-12-18 19:35:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-18 19:35:41,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-12-18 19:35:41,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 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) [2021-12-18 19:35:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-12-18 19:35:41,667 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 40 [2021-12-18 19:35:41,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:41,667 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-12-18 19:35:41,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,667 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-12-18 19:35:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 19:35:41,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:41,668 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:41,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:41,879 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,SelfDestructingSolverStorable17 [2021-12-18 19:35:41,879 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash 285729785, now seen corresponding path program 9 times [2021-12-18 19:35:41,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:41,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132049417] [2021-12-18 19:35:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:41,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:42,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:42,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132049417] [2021-12-18 19:35:42,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132049417] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:42,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331093869] [2021-12-18 19:35:42,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:35:42,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:42,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:42,130 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) [2021-12-18 19:35:42,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 19:35:42,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-18 19:35:42,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:42,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 19:35:42,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:42,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:42,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:35:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:42,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:42,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:35:42,616 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 26 treesize of output 22 [2021-12-18 19:35:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:42,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331093869] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:42,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:42,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2021-12-18 19:35:42,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104023659] [2021-12-18 19:35:42,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:42,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 19:35:42,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:42,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 19:35:42,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:35:42,787 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:43,330 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-12-18 19:35:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:35:43,330 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-18 19:35:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:43,331 INFO L225 Difference]: With dead ends: 70 [2021-12-18 19:35:43,331 INFO L226 Difference]: Without dead ends: 54 [2021-12-18 19:35:43,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-12-18 19:35:43,332 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:43,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 232 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 761 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2021-12-18 19:35:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-18 19:35:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-12-18 19:35:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 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) [2021-12-18 19:35:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-12-18 19:35:43,334 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2021-12-18 19:35:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:43,335 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-12-18 19:35:43,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-12-18 19:35:43,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 19:35:43,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:43,339 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:43,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:43,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:43,547 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:43,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1048562116, now seen corresponding path program 10 times [2021-12-18 19:35:43,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:43,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176150950] [2021-12-18 19:35:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:43,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:43,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:43,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176150950] [2021-12-18 19:35:43,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176150950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:43,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090571037] [2021-12-18 19:35:43,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:35:43,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:43,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:43,771 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:43,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 19:35:43,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:35:43,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:43,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-18 19:35:43,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:43,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:35:44,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:35:44,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:44,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-18 19:35:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 72 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:44,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:44,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:35:44,824 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 26 treesize of output 22 [2021-12-18 19:35:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 91 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:45,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090571037] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:45,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:45,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 50 [2021-12-18 19:35:45,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067245765] [2021-12-18 19:35:45,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:45,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-18 19:35:45,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:45,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-18 19:35:45,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2021-12-18 19:35:45,695 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 51 states, 50 states have (on average 2.48) internal successors, (124), 51 states have internal predecessors, (124), 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) [2021-12-18 19:35:46,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:46,509 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-12-18 19:35:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 19:35:46,509 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.48) internal successors, (124), 51 states have internal predecessors, (124), 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 50 [2021-12-18 19:35:46,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:46,510 INFO L225 Difference]: With dead ends: 56 [2021-12-18 19:35:46,510 INFO L226 Difference]: Without dead ends: 56 [2021-12-18 19:35:46,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=761, Invalid=3529, Unknown=0, NotChecked=0, Total=4290 [2021-12-18 19:35:46,511 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 129 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:46,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 167 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 697 Invalid, 0 Unknown, 22 Unchecked, 0.3s Time] [2021-12-18 19:35:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-18 19:35:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-12-18 19:35:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 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) [2021-12-18 19:35:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-12-18 19:35:46,513 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2021-12-18 19:35:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:46,513 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-12-18 19:35:46,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.48) internal successors, (124), 51 states have internal predecessors, (124), 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) [2021-12-18 19:35:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-12-18 19:35:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 19:35:46,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:46,514 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:46,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:46,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:46,728 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash -38131346, now seen corresponding path program 11 times [2021-12-18 19:35:46,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:46,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931513117] [2021-12-18 19:35:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:46,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:46,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:46,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931513117] [2021-12-18 19:35:46,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931513117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:46,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044260873] [2021-12-18 19:35:46,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:35:46,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:46,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:46,946 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:46,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 19:35:47,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-18 19:35:47,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:47,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-18 19:35:47,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:47,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:35:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 81 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:47,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 81 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:47,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044260873] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:47,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:47,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 49 [2021-12-18 19:35:47,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602336191] [2021-12-18 19:35:47,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:47,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 19:35:47,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:47,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 19:35:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:35:47,975 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 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) [2021-12-18 19:35:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:48,230 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-12-18 19:35:48,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 19:35:48,231 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 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 54 [2021-12-18 19:35:48,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:48,231 INFO L225 Difference]: With dead ends: 81 [2021-12-18 19:35:48,231 INFO L226 Difference]: Without dead ends: 62 [2021-12-18 19:35:48,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=732, Invalid=2690, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 19:35:48,233 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 72 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:48,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 52 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-18 19:35:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-12-18 19:35:48,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 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) [2021-12-18 19:35:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-12-18 19:35:48,234 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2021-12-18 19:35:48,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:48,235 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-12-18 19:35:48,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 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) [2021-12-18 19:35:48,235 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-12-18 19:35:48,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-18 19:35:48,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:48,235 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:48,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-18 19:35:48,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-18 19:35:48,447 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1873381553, now seen corresponding path program 12 times [2021-12-18 19:35:48,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:48,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343330525] [2021-12-18 19:35:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:48,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:48,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:48,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343330525] [2021-12-18 19:35:48,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343330525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:48,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998277578] [2021-12-18 19:35:48,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:35:48,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:48,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:48,762 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:48,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 19:35:48,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-18 19:35:48,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:48,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-18 19:35:48,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:49,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:49,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:35:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:49,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:49,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:35:49,342 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 26 treesize of output 22 [2021-12-18 19:35:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:49,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998277578] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:49,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:49,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2021-12-18 19:35:49,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736629745] [2021-12-18 19:35:49,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:49,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 19:35:49,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:49,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 19:35:49,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 19:35:49,499 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 states have internal predecessors, (105), 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) [2021-12-18 19:35:50,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:50,302 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-12-18 19:35:50,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 19:35:50,303 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 states have internal predecessors, (105), 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 58 [2021-12-18 19:35:50,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:50,303 INFO L225 Difference]: With dead ends: 86 [2021-12-18 19:35:50,303 INFO L226 Difference]: Without dead ends: 66 [2021-12-18 19:35:50,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=321, Invalid=3339, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:35:50,304 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:50,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 322 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1184 Invalid, 0 Unknown, 31 Unchecked, 0.4s Time] [2021-12-18 19:35:50,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-18 19:35:50,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-12-18 19:35:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-12-18 19:35:50,316 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2021-12-18 19:35:50,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:50,317 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-12-18 19:35:50,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 states have internal predecessors, (105), 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) [2021-12-18 19:35:50,317 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-12-18 19:35:50,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 19:35:50,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:50,317 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:50,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:50,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-18 19:35:50,523 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:50,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1870557580, now seen corresponding path program 13 times [2021-12-18 19:35:50,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:50,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185607613] [2021-12-18 19:35:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:50,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 91 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:50,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:50,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185607613] [2021-12-18 19:35:50,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185607613] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:50,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438775947] [2021-12-18 19:35:50,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:35:50,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:50,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:50,902 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:50,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 19:35:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:50,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 19:35:50,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:51,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:51,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:35:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:51,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438775947] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:51,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:51,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 46 [2021-12-18 19:35:51,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98107218] [2021-12-18 19:35:51,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:51,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-18 19:35:51,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:51,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-18 19:35:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 19:35:51,700 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 47 states, 46 states have (on average 2.717391304347826) internal successors, (125), 47 states have internal predecessors, (125), 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) [2021-12-18 19:35:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:52,444 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-12-18 19:35:52,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 19:35:52,444 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.717391304347826) internal successors, (125), 47 states have internal predecessors, (125), 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 62 [2021-12-18 19:35:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:52,445 INFO L225 Difference]: With dead ends: 66 [2021-12-18 19:35:52,445 INFO L226 Difference]: Without dead ends: 66 [2021-12-18 19:35:52,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=818, Invalid=3604, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 19:35:52,449 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 136 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:52,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 291 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:35:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-18 19:35:52,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-12-18 19:35:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:52,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-12-18 19:35:52,455 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2021-12-18 19:35:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:52,456 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-12-18 19:35:52,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.717391304347826) internal successors, (125), 47 states have internal predecessors, (125), 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) [2021-12-18 19:35:52,456 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-12-18 19:35:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-18 19:35:52,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:52,457 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:52,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:52,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:52,659 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:52,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:52,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1985462061, now seen corresponding path program 14 times [2021-12-18 19:35:52,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:52,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378971329] [2021-12-18 19:35:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:52,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 10 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:52,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:52,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378971329] [2021-12-18 19:35:52,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378971329] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:52,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391258121] [2021-12-18 19:35:52,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:35:52,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:52,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:52,993 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:52,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 19:35:53,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:35:53,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:53,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-18 19:35:53,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:53,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:54,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:54,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 19:35:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 120 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:54,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:54,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:35:54,909 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 15 treesize of output 11 [2021-12-18 19:35:54,913 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 26 treesize of output 22 [2021-12-18 19:35:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 120 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:55,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391258121] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:55,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:55,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 64 [2021-12-18 19:35:55,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291648573] [2021-12-18 19:35:55,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:55,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-18 19:35:55,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:55,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-18 19:35:55,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=3727, Unknown=0, NotChecked=0, Total=4032 [2021-12-18 19:35:55,007 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 64 states, 64 states have (on average 2.3125) internal successors, (148), 64 states have internal predecessors, (148), 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) [2021-12-18 19:35:55,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:55,984 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2021-12-18 19:35:55,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-18 19:35:55,985 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.3125) internal successors, (148), 64 states have internal predecessors, (148), 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 64 [2021-12-18 19:35:55,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:55,985 INFO L225 Difference]: With dead ends: 97 [2021-12-18 19:35:55,985 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 19:35:55,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=522, Invalid=5958, Unknown=0, NotChecked=0, Total=6480 [2021-12-18 19:35:55,987 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:55,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 450 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1150 Invalid, 0 Unknown, 164 Unchecked, 0.4s Time] [2021-12-18 19:35:55,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 19:35:55,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-12-18 19:35:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 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) [2021-12-18 19:35:55,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-12-18 19:35:55,989 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 64 [2021-12-18 19:35:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:55,989 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-12-18 19:35:55,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.3125) internal successors, (148), 64 states have internal predecessors, (148), 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) [2021-12-18 19:35:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-12-18 19:35:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-18 19:35:55,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:55,990 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:56,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-18 19:35:56,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:56,198 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:56,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:56,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1317550185, now seen corresponding path program 15 times [2021-12-18 19:35:56,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:56,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813533569] [2021-12-18 19:35:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:56,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:56,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:56,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813533569] [2021-12-18 19:35:56,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813533569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:56,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22133368] [2021-12-18 19:35:56,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:35:56,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:56,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:56,572 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:56,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 19:35:56,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-18 19:35:56,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:56,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-18 19:35:56,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:57,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:57,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:35:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:57,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:57,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:35:57,349 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 26 treesize of output 22 [2021-12-18 19:35:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:57,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22133368] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:57,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:57,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2021-12-18 19:35:57,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668458905] [2021-12-18 19:35:57,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:57,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-18 19:35:57,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:57,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-18 19:35:57,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2036, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 19:35:57,531 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 47 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 states have internal predecessors, (125), 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) [2021-12-18 19:35:58,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:58,626 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-12-18 19:35:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 19:35:58,628 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 states have internal predecessors, (125), 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 70 [2021-12-18 19:35:58,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:58,628 INFO L225 Difference]: With dead ends: 102 [2021-12-18 19:35:58,628 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 19:35:58,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=373, Invalid=4597, Unknown=0, NotChecked=0, Total=4970 [2021-12-18 19:35:58,629 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 99 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:58,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 454 Invalid, 1867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1749 Invalid, 0 Unknown, 55 Unchecked, 0.5s Time] [2021-12-18 19:35:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 19:35:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-12-18 19:35:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-12-18 19:35:58,631 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2021-12-18 19:35:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:58,631 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-12-18 19:35:58,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 states have internal predecessors, (125), 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) [2021-12-18 19:35:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-12-18 19:35:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-18 19:35:58,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:58,632 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:58,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:58,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-18 19:35:58,833 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:35:58,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:58,833 INFO L85 PathProgramCache]: Analyzing trace with hash 676245932, now seen corresponding path program 16 times [2021-12-18 19:35:58,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:58,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69984400] [2021-12-18 19:35:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:58,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 153 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:59,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:59,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69984400] [2021-12-18 19:35:59,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69984400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:59,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161817189] [2021-12-18 19:35:59,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:35:59,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:59,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:59,225 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:59,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 19:35:59,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:35:59,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-18 19:35:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:59,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:35:59,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:36:00,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:00,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-18 19:36:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 200 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:00,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:01,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:36:01,238 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 26 treesize of output 22 [2021-12-18 19:36:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 231 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:02,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161817189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:02,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:02,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 28] total 79 [2021-12-18 19:36:02,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008515318] [2021-12-18 19:36:02,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:02,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-18 19:36:02,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:02,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-18 19:36:02,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=655, Invalid=5665, Unknown=0, NotChecked=0, Total=6320 [2021-12-18 19:36:02,672 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 80 states, 79 states have (on average 2.7341772151898733) internal successors, (216), 80 states have internal predecessors, (216), 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) [2021-12-18 19:36:04,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:04,184 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-12-18 19:36:04,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 19:36:04,185 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 2.7341772151898733) internal successors, (216), 80 states have internal predecessors, (216), 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 74 [2021-12-18 19:36:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:04,185 INFO L225 Difference]: With dead ends: 80 [2021-12-18 19:36:04,185 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 19:36:04,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1583, Invalid=8317, Unknown=0, NotChecked=0, Total=9900 [2021-12-18 19:36:04,186 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 197 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 2005 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:04,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 493 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2005 Invalid, 0 Unknown, 47 Unchecked, 0.7s Time] [2021-12-18 19:36:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 19:36:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-12-18 19:36:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-12-18 19:36:04,189 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2021-12-18 19:36:04,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:04,189 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-12-18 19:36:04,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 2.7341772151898733) internal successors, (216), 80 states have internal predecessors, (216), 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) [2021-12-18 19:36:04,190 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-12-18 19:36:04,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-18 19:36:04,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:04,190 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:04,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-18 19:36:04,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-18 19:36:04,407 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:36:04,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:04,408 INFO L85 PathProgramCache]: Analyzing trace with hash 419261662, now seen corresponding path program 17 times [2021-12-18 19:36:04,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:04,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925872103] [2021-12-18 19:36:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:04,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 146 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:04,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:04,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925872103] [2021-12-18 19:36:04,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925872103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:04,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703406739] [2021-12-18 19:36:04,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:36:04,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:04,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:04,714 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:04,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 19:36:04,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-18 19:36:04,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:04,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-18 19:36:04,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:04,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:36:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 169 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:05,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 169 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:06,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703406739] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:06,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:06,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 68 [2021-12-18 19:36:06,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497298307] [2021-12-18 19:36:06,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:06,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-18 19:36:06,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:06,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-18 19:36:06,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=3769, Unknown=0, NotChecked=0, Total=4556 [2021-12-18 19:36:06,326 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 68 states have internal predecessors, (201), 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) [2021-12-18 19:36:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:07,088 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2021-12-18 19:36:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 19:36:07,089 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 68 states have internal predecessors, (201), 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 78 [2021-12-18 19:36:07,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:07,089 INFO L225 Difference]: With dead ends: 113 [2021-12-18 19:36:07,089 INFO L226 Difference]: Without dead ends: 86 [2021-12-18 19:36:07,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1615, Invalid=6941, Unknown=0, NotChecked=0, Total=8556 [2021-12-18 19:36:07,091 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 103 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:07,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 60 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:36:07,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-18 19:36:07,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-12-18 19:36:07,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:07,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-12-18 19:36:07,092 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2021-12-18 19:36:07,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:07,093 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-12-18 19:36:07,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 68 states have internal predecessors, (201), 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) [2021-12-18 19:36:07,093 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-12-18 19:36:07,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-18 19:36:07,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:07,093 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:07,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:07,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-18 19:36:07,303 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:36:07,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:07,304 INFO L85 PathProgramCache]: Analyzing trace with hash -215747807, now seen corresponding path program 18 times [2021-12-18 19:36:07,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:07,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585685582] [2021-12-18 19:36:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:07,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:07,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:07,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585685582] [2021-12-18 19:36:07,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585685582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:07,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063907161] [2021-12-18 19:36:07,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:36:07,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:07,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:07,778 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:07,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 19:36:07,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-18 19:36:07,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:07,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-18 19:36:07,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:08,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:36:08,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:36:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:08,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:08,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:36:08,699 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 26 treesize of output 22 [2021-12-18 19:36:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:08,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063907161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:08,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:08,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 53 [2021-12-18 19:36:08,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126660419] [2021-12-18 19:36:08,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:08,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-18 19:36:08,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:08,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-18 19:36:08,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2616, Unknown=0, NotChecked=0, Total=2756 [2021-12-18 19:36:08,902 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 53 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 53 states have internal predecessors, (145), 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) [2021-12-18 19:36:10,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:10,248 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2021-12-18 19:36:10,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 19:36:10,248 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 53 states have internal predecessors, (145), 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 82 [2021-12-18 19:36:10,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:10,249 INFO L225 Difference]: With dead ends: 118 [2021-12-18 19:36:10,249 INFO L226 Difference]: Without dead ends: 90 [2021-12-18 19:36:10,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=373, Invalid=6107, Unknown=0, NotChecked=0, Total=6480 [2021-12-18 19:36:10,250 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 128 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 2427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:10,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 556 Invalid, 2427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2216 Invalid, 0 Unknown, 135 Unchecked, 0.6s Time] [2021-12-18 19:36:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-18 19:36:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2021-12-18 19:36:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 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) [2021-12-18 19:36:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-12-18 19:36:10,251 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2021-12-18 19:36:10,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:10,252 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-12-18 19:36:10,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 53 states have internal predecessors, (145), 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) [2021-12-18 19:36:10,252 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-12-18 19:36:10,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-18 19:36:10,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:10,252 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:10,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:10,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:10,459 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:36:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:10,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1371037724, now seen corresponding path program 19 times [2021-12-18 19:36:10,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:10,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896175439] [2021-12-18 19:36:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:10,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 231 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:10,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:10,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896175439] [2021-12-18 19:36:10,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896175439] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:10,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873978096] [2021-12-18 19:36:10,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:36:10,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:10,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:10,925 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:10,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 19:36:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:11,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-18 19:36:11,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 276 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:11,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:11,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:36:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 276 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:12,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873978096] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:12,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:12,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 63 [2021-12-18 19:36:12,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654544566] [2021-12-18 19:36:12,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:12,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-18 19:36:12,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:12,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-18 19:36:12,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=3538, Unknown=0, NotChecked=0, Total=4032 [2021-12-18 19:36:12,079 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 64 states, 63 states have (on average 2.746031746031746) internal successors, (173), 64 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:12,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:12,907 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-12-18 19:36:12,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 19:36:12,908 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 2.746031746031746) internal successors, (173), 64 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-12-18 19:36:12,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:12,911 INFO L225 Difference]: With dead ends: 90 [2021-12-18 19:36:12,911 INFO L226 Difference]: Without dead ends: 90 [2021-12-18 19:36:12,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1158, Invalid=5162, Unknown=0, NotChecked=0, Total=6320 [2021-12-18 19:36:12,912 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 140 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:12,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 399 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:36:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-18 19:36:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-12-18 19:36:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 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) [2021-12-18 19:36:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-12-18 19:36:12,914 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2021-12-18 19:36:12,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:12,914 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-12-18 19:36:12,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 2.746031746031746) internal successors, (173), 64 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-12-18 19:36:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-18 19:36:12,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:12,915 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:12,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:13,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-18 19:36:13,131 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:36:13,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:13,132 INFO L85 PathProgramCache]: Analyzing trace with hash 987706525, now seen corresponding path program 20 times [2021-12-18 19:36:13,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:13,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124238504] [2021-12-18 19:36:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:13,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 14 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:13,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:13,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124238504] [2021-12-18 19:36:13,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124238504] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:13,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979880791] [2021-12-18 19:36:13,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:36:13,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:13,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:13,662 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:13,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 19:36:13,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:36:13,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:13,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-18 19:36:13,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:14,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:36:15,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:15,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 19:36:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 276 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:15,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:16,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:36:16,690 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 15 treesize of output 11 [2021-12-18 19:36:16,693 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 26 treesize of output 22 [2021-12-18 19:36:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 276 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:16,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979880791] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:16,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:16,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 84 [2021-12-18 19:36:16,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222458856] [2021-12-18 19:36:16,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:16,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-18 19:36:16,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:16,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-18 19:36:16,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=6477, Unknown=0, NotChecked=0, Total=6972 [2021-12-18 19:36:16,791 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 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) [2021-12-18 19:36:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:18,247 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2021-12-18 19:36:18,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-18 19:36:18,247 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 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 88 [2021-12-18 19:36:18,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:18,248 INFO L225 Difference]: With dead ends: 129 [2021-12-18 19:36:18,248 INFO L226 Difference]: Without dead ends: 99 [2021-12-18 19:36:18,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=810, Invalid=10110, Unknown=0, NotChecked=0, Total=10920 [2021-12-18 19:36:18,249 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:18,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 666 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1771 Invalid, 0 Unknown, 228 Unchecked, 0.6s Time] [2021-12-18 19:36:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-18 19:36:18,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-12-18 19:36:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 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) [2021-12-18 19:36:18,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-12-18 19:36:18,251 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 88 [2021-12-18 19:36:18,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:18,251 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-12-18 19:36:18,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 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) [2021-12-18 19:36:18,251 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-12-18 19:36:18,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-18 19:36:18,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:18,252 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:18,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:18,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:18,468 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:36:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:18,469 INFO L85 PathProgramCache]: Analyzing trace with hash -759383847, now seen corresponding path program 21 times [2021-12-18 19:36:18,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:18,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057699715] [2021-12-18 19:36:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:18,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 15 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:19,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:19,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057699715] [2021-12-18 19:36:19,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057699715] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:19,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103412221] [2021-12-18 19:36:19,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:36:19,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:19,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:19,069 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:19,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 19:36:19,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-18 19:36:19,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:19,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-18 19:36:19,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:19,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:36:19,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:36:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 15 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:19,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:20,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:36:20,136 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 26 treesize of output 22 [2021-12-18 19:36:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 15 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:20,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103412221] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:20,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:20,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 59 [2021-12-18 19:36:20,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149538236] [2021-12-18 19:36:20,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:20,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-18 19:36:20,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:20,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-18 19:36:20,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 19:36:20,362 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 59 states, 59 states have (on average 2.7966101694915255) internal successors, (165), 59 states have internal predecessors, (165), 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) [2021-12-18 19:36:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:22,122 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2021-12-18 19:36:22,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-18 19:36:22,122 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.7966101694915255) internal successors, (165), 59 states have internal predecessors, (165), 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 94 [2021-12-18 19:36:22,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:22,126 INFO L225 Difference]: With dead ends: 134 [2021-12-18 19:36:22,126 INFO L226 Difference]: Without dead ends: 102 [2021-12-18 19:36:22,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 161 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=477, Invalid=7713, Unknown=0, NotChecked=0, Total=8190 [2021-12-18 19:36:22,127 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 117 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 3041 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 3230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:22,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 769 Invalid, 3230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3041 Invalid, 0 Unknown, 115 Unchecked, 0.9s Time] [2021-12-18 19:36:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-18 19:36:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-12-18 19:36:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 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) [2021-12-18 19:36:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-12-18 19:36:22,128 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2021-12-18 19:36:22,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:22,128 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-12-18 19:36:22,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.7966101694915255) internal successors, (165), 59 states have internal predecessors, (165), 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) [2021-12-18 19:36:22,129 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-12-18 19:36:22,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-18 19:36:22,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:22,129 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:22,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-18 19:36:22,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:22,343 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:36:22,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:22,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1483974372, now seen corresponding path program 22 times [2021-12-18 19:36:22,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:22,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736335766] [2021-12-18 19:36:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:22,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 325 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:22,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736335766] [2021-12-18 19:36:22,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736335766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403980775] [2021-12-18 19:36:22,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:36:22,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:22,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:22,872 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:22,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 19:36:22,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:36:22,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:22,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-18 19:36:22,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:22,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:36:23,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:36:24,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:24,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-18 19:36:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 392 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:24,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:25,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:36:25,866 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 26 treesize of output 22 [2021-12-18 19:36:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 435 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:28,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403980775] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:28,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:28,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36, 36] total 103 [2021-12-18 19:36:28,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516158844] [2021-12-18 19:36:28,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:28,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-18 19:36:28,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:28,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-18 19:36:28,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1089, Invalid=9623, Unknown=0, NotChecked=0, Total=10712 [2021-12-18 19:36:28,070 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 104 states, 103 states have (on average 2.796116504854369) internal successors, (288), 104 states have internal predecessors, (288), 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) [2021-12-18 19:36:30,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:30,096 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-12-18 19:36:30,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 19:36:30,097 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 2.796116504854369) internal successors, (288), 104 states have internal predecessors, (288), 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 98 [2021-12-18 19:36:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:30,097 INFO L225 Difference]: With dead ends: 104 [2021-12-18 19:36:30,097 INFO L226 Difference]: Without dead ends: 104 [2021-12-18 19:36:30,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2731 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2571, Invalid=13685, Unknown=0, NotChecked=0, Total=16256 [2021-12-18 19:36:30,098 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 263 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 2327 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 2569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 2327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:30,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 502 Invalid, 2569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 2327 Invalid, 0 Unknown, 19 Unchecked, 0.9s Time] [2021-12-18 19:36:30,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-18 19:36:30,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-12-18 19:36:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 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) [2021-12-18 19:36:30,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-12-18 19:36:30,100 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2021-12-18 19:36:30,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:30,100 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-12-18 19:36:30,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 2.796116504854369) internal successors, (288), 104 states have internal predecessors, (288), 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) [2021-12-18 19:36:30,100 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-12-18 19:36:30,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-18 19:36:30,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:30,101 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:30,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-18 19:36:30,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:30,307 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:36:30,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:30,308 INFO L85 PathProgramCache]: Analyzing trace with hash -382084018, now seen corresponding path program 23 times [2021-12-18 19:36:30,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:30,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369763071] [2021-12-18 19:36:30,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:30,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 258 proven. 466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:30,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:30,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369763071] [2021-12-18 19:36:30,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369763071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:30,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917525085] [2021-12-18 19:36:30,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:36:30,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:30,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:30,841 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:30,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 19:36:30,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-18 19:36:30,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:31,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-18 19:36:31,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:31,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:36:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 289 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:32,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 289 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:33,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917525085] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:33,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:33,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 89 [2021-12-18 19:36:33,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704623312] [2021-12-18 19:36:33,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:33,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-18 19:36:33,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:33,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-18 19:36:33,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1440, Invalid=6392, Unknown=0, NotChecked=0, Total=7832 [2021-12-18 19:36:33,305 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 89 states have internal predecessors, (265), 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) [2021-12-18 19:36:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:33,895 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2021-12-18 19:36:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 19:36:33,895 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 89 states have internal predecessors, (265), 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 102 [2021-12-18 19:36:33,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:33,896 INFO L225 Difference]: With dead ends: 145 [2021-12-18 19:36:33,896 INFO L226 Difference]: Without dead ends: 110 [2021-12-18 19:36:33,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2316, Invalid=9026, Unknown=0, NotChecked=0, Total=11342 [2021-12-18 19:36:33,897 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 120 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:33,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 55 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:36:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-18 19:36:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-12-18 19:36:33,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 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) [2021-12-18 19:36:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-12-18 19:36:33,909 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2021-12-18 19:36:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:33,909 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-12-18 19:36:33,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 89 states have internal predecessors, (265), 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) [2021-12-18 19:36:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-12-18 19:36:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-18 19:36:33,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:33,910 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:33,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:34,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:34,121 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:36:34,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:34,121 INFO L85 PathProgramCache]: Analyzing trace with hash 307399057, now seen corresponding path program 24 times [2021-12-18 19:36:34,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:34,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468423140] [2021-12-18 19:36:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:34,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 17 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:34,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:34,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468423140] [2021-12-18 19:36:34,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468423140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:34,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004519571] [2021-12-18 19:36:34,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:36:34,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:34,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:34,814 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:34,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 19:36:35,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-18 19:36:35,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:35,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-18 19:36:35,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:35,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:36:36,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:36:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 17 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:36,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:36,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:36:36,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-18 19:36:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 17 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:36,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004519571] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:36,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:36,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 65 [2021-12-18 19:36:36,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488298139] [2021-12-18 19:36:36,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:36,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-18 19:36:36,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:36,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-18 19:36:36,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3992, Unknown=0, NotChecked=0, Total=4160 [2021-12-18 19:36:36,483 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 65 states, 65 states have (on average 2.8461538461538463) internal successors, (185), 65 states have internal predecessors, (185), 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) [2021-12-18 19:36:38,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:38,651 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2021-12-18 19:36:38,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-18 19:36:38,652 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.8461538461538463) internal successors, (185), 65 states have internal predecessors, (185), 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 106 [2021-12-18 19:36:38,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:38,652 INFO L225 Difference]: With dead ends: 150 [2021-12-18 19:36:38,652 INFO L226 Difference]: Without dead ends: 114 [2021-12-18 19:36:38,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=529, Invalid=9571, Unknown=0, NotChecked=0, Total=10100 [2021-12-18 19:36:38,653 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 154 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 3782 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 3983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:38,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 899 Invalid, 3983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3782 Invalid, 0 Unknown, 87 Unchecked, 1.1s Time] [2021-12-18 19:36:38,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-18 19:36:38,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-12-18 19:36:38,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 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) [2021-12-18 19:36:38,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-12-18 19:36:38,655 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2021-12-18 19:36:38,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:38,656 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-12-18 19:36:38,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.8461538461538463) internal successors, (185), 65 states have internal predecessors, (185), 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) [2021-12-18 19:36:38,656 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-12-18 19:36:38,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-18 19:36:38,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:38,656 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:38,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:38,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-18 19:36:38,870 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:36:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:38,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2029837652, now seen corresponding path program 25 times [2021-12-18 19:36:38,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:38,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250963873] [2021-12-18 19:36:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:38,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 435 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:39,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:39,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250963873] [2021-12-18 19:36:39,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250963873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:39,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111332821] [2021-12-18 19:36:39,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:36:39,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:39,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:39,549 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:39,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 19:36:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-18 19:36:39,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 496 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:40,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:40,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:36:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 496 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:41,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111332821] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:41,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:41,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 79 [2021-12-18 19:36:41,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447078529] [2021-12-18 19:36:41,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:41,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-18 19:36:41,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:41,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-18 19:36:41,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=5550, Unknown=0, NotChecked=0, Total=6320 [2021-12-18 19:36:41,093 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 80 states, 79 states have (on average 2.7974683544303796) internal successors, (221), 80 states have internal predecessors, (221), 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) [2021-12-18 19:36:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:42,232 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2021-12-18 19:36:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 19:36:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 2.7974683544303796) internal successors, (221), 80 states have internal predecessors, (221), 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 110 [2021-12-18 19:36:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:42,233 INFO L225 Difference]: With dead ends: 114 [2021-12-18 19:36:42,233 INFO L226 Difference]: Without dead ends: 114 [2021-12-18 19:36:42,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2607 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1800, Invalid=8100, Unknown=0, NotChecked=0, Total=9900 [2021-12-18 19:36:42,234 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 255 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 2467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:42,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 530 Invalid, 2467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2259 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 19:36:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-18 19:36:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-12-18 19:36:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 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) [2021-12-18 19:36:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2021-12-18 19:36:42,236 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2021-12-18 19:36:42,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:42,236 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2021-12-18 19:36:42,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 2.7974683544303796) internal successors, (221), 80 states have internal predecessors, (221), 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) [2021-12-18 19:36:42,237 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2021-12-18 19:36:42,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-18 19:36:42,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:42,237 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:42,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:42,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-18 19:36:42,438 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:36:42,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:42,438 INFO L85 PathProgramCache]: Analyzing trace with hash 758830605, now seen corresponding path program 26 times [2021-12-18 19:36:42,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:42,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637808114] [2021-12-18 19:36:42,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:42,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 18 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:43,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:43,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637808114] [2021-12-18 19:36:43,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637808114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:43,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121246614] [2021-12-18 19:36:43,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:36:43,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:43,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:43,178 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:43,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 19:36:43,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:36:43,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:43,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 111 conjunts are in the unsatisfiable core [2021-12-18 19:36:43,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:43,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:36:45,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:45,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 19:36:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 496 proven. 389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:45,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:47,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:36:47,462 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 15 treesize of output 11 [2021-12-18 19:36:47,465 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 26 treesize of output 22 [2021-12-18 19:36:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 496 proven. 389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:47,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121246614] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:47,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:47,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 104 [2021-12-18 19:36:47,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597263618] [2021-12-18 19:36:47,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:47,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-18 19:36:47,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:47,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-18 19:36:47,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=9979, Unknown=0, NotChecked=0, Total=10712 [2021-12-18 19:36:47,590 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 104 states, 104 states have (on average 2.5) internal successors, (260), 104 states have internal predecessors, (260), 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) [2021-12-18 19:36:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:49,685 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2021-12-18 19:36:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-18 19:36:49,686 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.5) internal successors, (260), 104 states have internal predecessors, (260), 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 112 [2021-12-18 19:36:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:49,686 INFO L225 Difference]: With dead ends: 161 [2021-12-18 19:36:49,686 INFO L226 Difference]: Without dead ends: 123 [2021-12-18 19:36:49,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2739 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1162, Invalid=15350, Unknown=0, NotChecked=0, Total=16512 [2021-12-18 19:36:49,687 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:49,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 920 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2342 Invalid, 0 Unknown, 214 Unchecked, 0.8s Time] [2021-12-18 19:36:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-18 19:36:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2021-12-18 19:36:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 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) [2021-12-18 19:36:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2021-12-18 19:36:49,690 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 112 [2021-12-18 19:36:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:49,690 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2021-12-18 19:36:49,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.5) internal successors, (260), 104 states have internal predecessors, (260), 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) [2021-12-18 19:36:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2021-12-18 19:36:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-18 19:36:49,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:49,691 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:49,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:49,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-18 19:36:49,899 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:36:49,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:49,900 INFO L85 PathProgramCache]: Analyzing trace with hash 111502665, now seen corresponding path program 27 times [2021-12-18 19:36:49,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:49,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186829748] [2021-12-18 19:36:49,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:49,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 991 backedges. 19 proven. 972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:50,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:50,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186829748] [2021-12-18 19:36:50,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186829748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:50,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298079934] [2021-12-18 19:36:50,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:36:50,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:50,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:50,784 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:50,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 19:36:51,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-12-18 19:36:51,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:51,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-18 19:36:51,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:52,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:36:52,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:36:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 991 backedges. 19 proven. 972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:52,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:52,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:36:52,380 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 26 treesize of output 22 [2021-12-18 19:36:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 991 backedges. 19 proven. 972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:52,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298079934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:52,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:52,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 71 [2021-12-18 19:36:52,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153754589] [2021-12-18 19:36:52,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:52,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-18 19:36:52,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:52,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-18 19:36:52,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=4788, Unknown=0, NotChecked=0, Total=4970 [2021-12-18 19:36:52,654 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 71 states, 71 states have (on average 2.887323943661972) internal successors, (205), 71 states have internal predecessors, (205), 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) [2021-12-18 19:36:55,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:55,250 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2021-12-18 19:36:55,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-18 19:36:55,250 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.887323943661972) internal successors, (205), 71 states have internal predecessors, (205), 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 118 [2021-12-18 19:36:55,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:55,251 INFO L225 Difference]: With dead ends: 166 [2021-12-18 19:36:55,251 INFO L226 Difference]: Without dead ends: 126 [2021-12-18 19:36:55,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 205 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=505, Invalid=11705, Unknown=0, NotChecked=0, Total=12210 [2021-12-18 19:36:55,252 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 128 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 4716 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 4979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 4716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:55,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1109 Invalid, 4979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 4716 Invalid, 0 Unknown, 187 Unchecked, 1.3s Time] [2021-12-18 19:36:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-18 19:36:55,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2021-12-18 19:36:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 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) [2021-12-18 19:36:55,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2021-12-18 19:36:55,253 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 118 [2021-12-18 19:36:55,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:55,254 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2021-12-18 19:36:55,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.887323943661972) internal successors, (205), 71 states have internal predecessors, (205), 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) [2021-12-18 19:36:55,254 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2021-12-18 19:36:55,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-18 19:36:55,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:55,254 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:55,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:55,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:55,455 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:36:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:55,455 INFO L85 PathProgramCache]: Analyzing trace with hash -415683444, now seen corresponding path program 28 times [2021-12-18 19:36:55,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:55,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031162806] [2021-12-18 19:36:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:55,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 561 proven. 503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:56,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:56,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031162806] [2021-12-18 19:36:56,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031162806] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:56,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698760461] [2021-12-18 19:36:56,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:36:56,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:56,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:56,140 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:56,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-18 19:36:56,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:36:56,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:56,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-18 19:36:56,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:56,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:36:57,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:36:58,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:58,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-18 19:36:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 648 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:58,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:00,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:37:00,370 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 26 treesize of output 22 [2021-12-18 19:37:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 703 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:03,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698760461] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:03,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:03,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 44, 44] total 127 [2021-12-18 19:37:03,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840955111] [2021-12-18 19:37:03,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:03,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-12-18 19:37:03,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:03,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-12-18 19:37:03,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1635, Invalid=14621, Unknown=0, NotChecked=0, Total=16256 [2021-12-18 19:37:03,372 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 128 states, 127 states have (on average 2.8346456692913384) internal successors, (360), 128 states have internal predecessors, (360), 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) [2021-12-18 19:37:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:06,324 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2021-12-18 19:37:06,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-18 19:37:06,324 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 2.8346456692913384) internal successors, (360), 128 states have internal predecessors, (360), 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 122 [2021-12-18 19:37:06,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:06,325 INFO L225 Difference]: With dead ends: 128 [2021-12-18 19:37:06,325 INFO L226 Difference]: Without dead ends: 128 [2021-12-18 19:37:06,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4215 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3755, Invalid=20425, Unknown=0, NotChecked=0, Total=24180 [2021-12-18 19:37:06,326 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 209 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 3790 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 4028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 3790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:06,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 830 Invalid, 4028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 3790 Invalid, 0 Unknown, 58 Unchecked, 1.3s Time] [2021-12-18 19:37:06,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-18 19:37:06,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-12-18 19:37:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 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) [2021-12-18 19:37:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2021-12-18 19:37:06,328 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2021-12-18 19:37:06,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:06,328 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2021-12-18 19:37:06,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 127 states have (on average 2.8346456692913384) internal successors, (360), 128 states have internal predecessors, (360), 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) [2021-12-18 19:37:06,328 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2021-12-18 19:37:06,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-18 19:37:06,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:06,329 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:06,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:06,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-18 19:37:06,539 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:37:06,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash 376403902, now seen corresponding path program 29 times [2021-12-18 19:37:06,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:06,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718119111] [2021-12-18 19:37:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:06,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 402 proven. 742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:07,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:07,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718119111] [2021-12-18 19:37:07,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718119111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:07,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512265977] [2021-12-18 19:37:07,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:37:07,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:07,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:07,239 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:07,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-18 19:37:07,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-18 19:37:07,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:07,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-18 19:37:07,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:07,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:37:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 441 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:09,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 441 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:10,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512265977] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:10,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:10,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 109 [2021-12-18 19:37:10,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624815275] [2021-12-18 19:37:10,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:10,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-18 19:37:10,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:10,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-18 19:37:10,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2154, Invalid=9618, Unknown=0, NotChecked=0, Total=11772 [2021-12-18 19:37:10,807 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 109 states, 109 states have (on average 3.018348623853211) internal successors, (329), 109 states have internal predecessors, (329), 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) [2021-12-18 19:37:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:11,669 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2021-12-18 19:37:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-18 19:37:11,669 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.018348623853211) internal successors, (329), 109 states have internal predecessors, (329), 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 126 [2021-12-18 19:37:11,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:11,670 INFO L225 Difference]: With dead ends: 177 [2021-12-18 19:37:11,670 INFO L226 Difference]: Without dead ends: 134 [2021-12-18 19:37:11,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4230 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3444, Invalid=13586, Unknown=0, NotChecked=0, Total=17030 [2021-12-18 19:37:11,672 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 142 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:11,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 95 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:37:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-18 19:37:11,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2021-12-18 19:37:11,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 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) [2021-12-18 19:37:11,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2021-12-18 19:37:11,674 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 126 [2021-12-18 19:37:11,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:11,674 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2021-12-18 19:37:11,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.018348623853211) internal successors, (329), 109 states have internal predecessors, (329), 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) [2021-12-18 19:37:11,674 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2021-12-18 19:37:11,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-18 19:37:11,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:11,675 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:11,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:11,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-18 19:37:11,883 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:37:11,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:11,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1271575551, now seen corresponding path program 30 times [2021-12-18 19:37:11,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:11,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321969879] [2021-12-18 19:37:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:11,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 21 proven. 1200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:12,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:12,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321969879] [2021-12-18 19:37:12,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321969879] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:12,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696530747] [2021-12-18 19:37:12,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:37:12,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:12,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:12,816 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:12,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-18 19:37:13,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-12-18 19:37:13,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:13,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-18 19:37:13,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:14,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:37:14,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:37:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 21 proven. 1200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:14,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:14,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:37:14,755 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 26 treesize of output 22 [2021-12-18 19:37:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 21 proven. 1200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:15,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696530747] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:15,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:15,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 77 [2021-12-18 19:37:15,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669418741] [2021-12-18 19:37:15,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:15,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-18 19:37:15,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:15,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-18 19:37:15,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=5656, Unknown=0, NotChecked=0, Total=5852 [2021-12-18 19:37:15,052 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 77 states, 77 states have (on average 2.9220779220779223) internal successors, (225), 77 states have internal predecessors, (225), 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) [2021-12-18 19:37:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:18,229 INFO L93 Difference]: Finished difference Result 182 states and 183 transitions. [2021-12-18 19:37:18,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-18 19:37:18,230 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.9220779220779223) internal successors, (225), 77 states have internal predecessors, (225), 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 130 [2021-12-18 19:37:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:18,230 INFO L225 Difference]: With dead ends: 182 [2021-12-18 19:37:18,230 INFO L226 Difference]: Without dead ends: 138 [2021-12-18 19:37:18,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 227 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=633, Invalid=13887, Unknown=0, NotChecked=0, Total=14520 [2021-12-18 19:37:18,231 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 150 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 5784 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 6051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 5784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:18,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1359 Invalid, 6051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 5784 Invalid, 0 Unknown, 164 Unchecked, 1.6s Time] [2021-12-18 19:37:18,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-18 19:37:18,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2021-12-18 19:37:18,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 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) [2021-12-18 19:37:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-12-18 19:37:18,233 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2021-12-18 19:37:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:18,233 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-12-18 19:37:18,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.9220779220779223) internal successors, (225), 77 states have internal predecessors, (225), 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) [2021-12-18 19:37:18,234 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-12-18 19:37:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-18 19:37:18,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:18,234 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:18,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-18 19:37:18,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-18 19:37:18,447 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:37:18,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:18,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1767815484, now seen corresponding path program 31 times [2021-12-18 19:37:18,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:18,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700977075] [2021-12-18 19:37:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:18,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 703 proven. 599 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:19,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:19,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700977075] [2021-12-18 19:37:19,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700977075] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:19,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285153349] [2021-12-18 19:37:19,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:37:19,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:19,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:19,297 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:19,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-18 19:37:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-18 19:37:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 780 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:20,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:21,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:37:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 780 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:21,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285153349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:21,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:21,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 95 [2021-12-18 19:37:21,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920931572] [2021-12-18 19:37:21,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:21,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-18 19:37:21,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:21,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-18 19:37:21,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=8010, Unknown=0, NotChecked=0, Total=9120 [2021-12-18 19:37:21,424 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 96 states, 95 states have (on average 2.831578947368421) internal successors, (269), 96 states have internal predecessors, (269), 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) [2021-12-18 19:37:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:23,340 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2021-12-18 19:37:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-18 19:37:23,340 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 2.831578947368421) internal successors, (269), 96 states have internal predecessors, (269), 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 134 [2021-12-18 19:37:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:23,341 INFO L225 Difference]: With dead ends: 138 [2021-12-18 19:37:23,341 INFO L226 Difference]: Without dead ends: 138 [2021-12-18 19:37:23,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3807 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2586, Invalid=11694, Unknown=0, NotChecked=0, Total=14280 [2021-12-18 19:37:23,342 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 242 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 4254 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 4454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 4254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:23,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 1031 Invalid, 4454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 4254 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-18 19:37:23,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-18 19:37:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-12-18 19:37:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 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) [2021-12-18 19:37:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2021-12-18 19:37:23,344 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2021-12-18 19:37:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:23,344 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2021-12-18 19:37:23,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 2.831578947368421) internal successors, (269), 96 states have internal predecessors, (269), 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) [2021-12-18 19:37:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2021-12-18 19:37:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-18 19:37:23,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:23,345 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:23,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:23,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:23,545 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:37:23,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:23,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1936368509, now seen corresponding path program 32 times [2021-12-18 19:37:23,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:23,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314663192] [2021-12-18 19:37:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:23,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 22 proven. 1323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:24,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:24,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314663192] [2021-12-18 19:37:24,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314663192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:24,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957602882] [2021-12-18 19:37:24,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:37:24,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:24,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:24,559 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:24,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-18 19:37:24,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:37:24,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:24,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-18 19:37:24,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:25,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:37:28,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:37:28,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 19:37:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 780 proven. 565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:28,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:30,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:37:30,378 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 15 treesize of output 11 [2021-12-18 19:37:30,382 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 26 treesize of output 22 [2021-12-18 19:37:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 780 proven. 565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:30,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957602882] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:30,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:30,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 124 [2021-12-18 19:37:30,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602548675] [2021-12-18 19:37:30,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:30,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2021-12-18 19:37:30,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:30,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-12-18 19:37:30,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=14233, Unknown=0, NotChecked=0, Total=15252 [2021-12-18 19:37:30,530 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 124 states, 124 states have (on average 2.5483870967741935) internal successors, (316), 124 states have internal predecessors, (316), 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) [2021-12-18 19:37:34,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:34,589 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2021-12-18 19:37:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-18 19:37:34,589 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.5483870967741935) internal successors, (316), 124 states have internal predecessors, (316), 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 136 [2021-12-18 19:37:34,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:34,590 INFO L225 Difference]: With dead ends: 193 [2021-12-18 19:37:34,590 INFO L226 Difference]: Without dead ends: 147 [2021-12-18 19:37:34,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3913 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1578, Invalid=21678, Unknown=0, NotChecked=0, Total=23256 [2021-12-18 19:37:34,591 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 3891 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 4103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:34,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1368 Invalid, 4103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3891 Invalid, 0 Unknown, 188 Unchecked, 1.2s Time] [2021-12-18 19:37:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-18 19:37:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-12-18 19:37:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 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) [2021-12-18 19:37:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2021-12-18 19:37:34,593 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 136 [2021-12-18 19:37:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:34,594 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2021-12-18 19:37:34,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.5483870967741935) internal successors, (316), 124 states have internal predecessors, (316), 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) [2021-12-18 19:37:34,594 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2021-12-18 19:37:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-18 19:37:34,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:34,595 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:34,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:34,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-18 19:37:34,807 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:37:34,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:34,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1329741241, now seen corresponding path program 33 times [2021-12-18 19:37:34,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:34,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136006594] [2021-12-18 19:37:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:34,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1475 backedges. 23 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:35,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:35,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136006594] [2021-12-18 19:37:35,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136006594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:35,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255107869] [2021-12-18 19:37:35,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:37:35,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:35,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:35,935 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:35,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-18 19:37:36,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-12-18 19:37:36,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:36,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 156 conjunts are in the unsatisfiable core [2021-12-18 19:37:36,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:37,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:37:38,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:37:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1475 backedges. 23 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:38,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:38,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:37:38,359 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 26 treesize of output 22 [2021-12-18 19:37:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1475 backedges. 23 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:38,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255107869] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:38,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:38,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 83 [2021-12-18 19:37:38,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260942670] [2021-12-18 19:37:38,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:38,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-18 19:37:38,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:38,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-18 19:37:38,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6596, Unknown=0, NotChecked=0, Total=6806 [2021-12-18 19:37:38,698 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 83 states, 83 states have (on average 2.9518072289156625) internal successors, (245), 83 states have internal predecessors, (245), 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) [2021-12-18 19:37:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:42,623 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2021-12-18 19:37:42,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-18 19:37:42,624 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.9518072289156625) internal successors, (245), 83 states have internal predecessors, (245), 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 142 [2021-12-18 19:37:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:42,635 INFO L225 Difference]: With dead ends: 198 [2021-12-18 19:37:42,636 INFO L226 Difference]: Without dead ends: 150 [2021-12-18 19:37:42,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 249 SyntacticMatches, 4 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=685, Invalid=16345, Unknown=0, NotChecked=0, Total=17030 [2021-12-18 19:37:42,638 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 128 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 7092 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 7377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 7092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:42,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1655 Invalid, 7377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 7092 Invalid, 0 Unknown, 195 Unchecked, 2.0s Time] [2021-12-18 19:37:42,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-18 19:37:42,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2021-12-18 19:37:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 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) [2021-12-18 19:37:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2021-12-18 19:37:42,640 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 142 [2021-12-18 19:37:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:42,642 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2021-12-18 19:37:42,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.9518072289156625) internal successors, (245), 83 states have internal predecessors, (245), 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) [2021-12-18 19:37:42,642 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2021-12-18 19:37:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-18 19:37:42,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:42,643 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:42,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:42,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:42,862 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:37:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:42,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1957352452, now seen corresponding path program 34 times [2021-12-18 19:37:42,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:42,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187715178] [2021-12-18 19:37:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:42,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 861 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:43,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:43,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187715178] [2021-12-18 19:37:43,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187715178] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:43,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797899154] [2021-12-18 19:37:43,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:37:43,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:43,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:43,883 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:43,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-18 19:37:44,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:37:44,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:44,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 143 conjunts are in the unsatisfiable core [2021-12-18 19:37:44,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:44,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:37:44,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:37:46,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:37:46,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-18 19:37:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 968 proven. 596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:46,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:48,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:37:48,165 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 26 treesize of output 22 [2021-12-18 19:37:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1035 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:51,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797899154] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:51,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:51,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 52, 52] total 130 [2021-12-18 19:37:51,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823883178] [2021-12-18 19:37:51,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:51,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-12-18 19:37:51,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:51,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-12-18 19:37:51,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1796, Invalid=15234, Unknown=0, NotChecked=0, Total=17030 [2021-12-18 19:37:51,960 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 131 states, 130 states have (on average 2.6769230769230767) internal successors, (348), 131 states have internal predecessors, (348), 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) [2021-12-18 19:37:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:55,613 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2021-12-18 19:37:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-18 19:37:55,614 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 2.6769230769230767) internal successors, (348), 131 states have internal predecessors, (348), 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 146 [2021-12-18 19:37:55,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:55,614 INFO L225 Difference]: With dead ends: 152 [2021-12-18 19:37:55,614 INFO L226 Difference]: Without dead ends: 152 [2021-12-18 19:37:55,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4293 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=3957, Invalid=22125, Unknown=0, NotChecked=0, Total=26082 [2021-12-18 19:37:55,615 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 333 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 5278 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 5573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 5278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:55,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 1079 Invalid, 5573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 5278 Invalid, 0 Unknown, 48 Unchecked, 1.9s Time] [2021-12-18 19:37:55,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-18 19:37:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-12-18 19:37:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2021-12-18 19:37:55,617 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2021-12-18 19:37:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:55,617 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2021-12-18 19:37:55,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 2.6769230769230767) internal successors, (348), 131 states have internal predecessors, (348), 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) [2021-12-18 19:37:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2021-12-18 19:37:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-18 19:37:55,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:55,618 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:55,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:55,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-18 19:37:55,831 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:37:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:55,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1151221550, now seen corresponding path program 35 times [2021-12-18 19:37:55,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:55,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084302501] [2021-12-18 19:37:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:55,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 578 proven. 1082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:56,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:56,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084302501] [2021-12-18 19:37:56,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084302501] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:56,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087112608] [2021-12-18 19:37:56,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:37:56,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:56,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:56,774 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:56,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-18 19:37:57,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-18 19:37:57,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:57,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-18 19:37:57,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:57,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:37:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 625 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:59,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 625 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:01,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087112608] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:01,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:01,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 129 [2021-12-18 19:38:01,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24955103] [2021-12-18 19:38:01,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:01,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-12-18 19:38:01,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:01,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-12-18 19:38:01,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3012, Invalid=13500, Unknown=0, NotChecked=0, Total=16512 [2021-12-18 19:38:01,658 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 129 states, 129 states have (on average 3.046511627906977) internal successors, (393), 129 states have internal predecessors, (393), 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) [2021-12-18 19:38:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:02,821 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2021-12-18 19:38:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-18 19:38:02,822 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.046511627906977) internal successors, (393), 129 states have internal predecessors, (393), 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 150 [2021-12-18 19:38:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:02,823 INFO L225 Difference]: With dead ends: 209 [2021-12-18 19:38:02,823 INFO L226 Difference]: Without dead ends: 158 [2021-12-18 19:38:02,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5988 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4796, Invalid=19074, Unknown=0, NotChecked=0, Total=23870 [2021-12-18 19:38:02,824 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 174 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:02,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 79 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:38:02,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-18 19:38:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 155. [2021-12-18 19:38:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 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) [2021-12-18 19:38:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2021-12-18 19:38:02,827 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 150 [2021-12-18 19:38:02,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:02,827 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2021-12-18 19:38:02,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.046511627906977) internal successors, (393), 129 states have internal predecessors, (393), 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) [2021-12-18 19:38:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2021-12-18 19:38:02,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-18 19:38:02,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:02,828 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:02,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-18 19:38:03,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:03,046 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:38:03,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:03,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1144243599, now seen corresponding path program 36 times [2021-12-18 19:38:03,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:03,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372003852] [2021-12-18 19:38:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:03,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 25 proven. 1728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:04,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:04,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372003852] [2021-12-18 19:38:04,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372003852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:04,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855610044] [2021-12-18 19:38:04,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:38:04,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:04,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:04,298 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:04,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-18 19:38:06,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-12-18 19:38:06,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 168 conjunts are in the unsatisfiable core [2021-12-18 19:38:06,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:07,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:38:07,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:38:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 25 proven. 1728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:07,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:08,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:38:08,109 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 26 treesize of output 22 [2021-12-18 19:38:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 25 proven. 1728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:08,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855610044] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:08,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:08,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 89 [2021-12-18 19:38:08,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203809845] [2021-12-18 19:38:08,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:08,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-18 19:38:08,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-18 19:38:08,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=7608, Unknown=0, NotChecked=0, Total=7832 [2021-12-18 19:38:08,470 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 89 states have internal predecessors, (265), 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) [2021-12-18 19:38:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:12,888 INFO L93 Difference]: Finished difference Result 214 states and 215 transitions. [2021-12-18 19:38:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-18 19:38:12,888 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 89 states have internal predecessors, (265), 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 154 [2021-12-18 19:38:12,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:12,889 INFO L225 Difference]: With dead ends: 214 [2021-12-18 19:38:12,889 INFO L226 Difference]: Without dead ends: 162 [2021-12-18 19:38:12,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 271 SyntacticMatches, 4 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2107 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=737, Invalid=19003, Unknown=0, NotChecked=0, Total=19740 [2021-12-18 19:38:12,890 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 197 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 8019 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 8166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 8019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:12,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1765 Invalid, 8166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 8019 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-18 19:38:12,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-18 19:38:12,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2021-12-18 19:38:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 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) [2021-12-18 19:38:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2021-12-18 19:38:12,892 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2021-12-18 19:38:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:12,892 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2021-12-18 19:38:12,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 89 states have internal predecessors, (265), 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) [2021-12-18 19:38:12,892 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2021-12-18 19:38:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-18 19:38:12,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:12,893 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:12,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-18 19:38:13,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-18 19:38:13,099 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:38:13,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:13,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1456153548, now seen corresponding path program 37 times [2021-12-18 19:38:13,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:13,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910789345] [2021-12-18 19:38:13,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:13,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1035 proven. 815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:14,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:14,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910789345] [2021-12-18 19:38:14,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910789345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:14,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521472830] [2021-12-18 19:38:14,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:38:14,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:14,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:14,242 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:14,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-18 19:38:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:14,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-18 19:38:14,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1128 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:15,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:16,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:38:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1128 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:17,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521472830] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:17,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:17,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 111 [2021-12-18 19:38:17,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013484866] [2021-12-18 19:38:17,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:17,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-12-18 19:38:17,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:17,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-12-18 19:38:17,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=10918, Unknown=0, NotChecked=0, Total=12432 [2021-12-18 19:38:17,017 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 112 states, 111 states have (on average 2.855855855855856) internal successors, (317), 112 states have internal predecessors, (317), 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) [2021-12-18 19:38:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:19,474 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2021-12-18 19:38:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-18 19:38:19,474 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 111 states have (on average 2.855855855855856) internal successors, (317), 112 states have internal predecessors, (317), 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 158 [2021-12-18 19:38:19,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:19,478 INFO L225 Difference]: With dead ends: 162 [2021-12-18 19:38:19,478 INFO L226 Difference]: Without dead ends: 162 [2021-12-18 19:38:19,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 255 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5284 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3516, Invalid=15944, Unknown=0, NotChecked=0, Total=19460 [2021-12-18 19:38:19,480 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 435 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 5085 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 5456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 5085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:19,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 1152 Invalid, 5456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 5085 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-18 19:38:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-18 19:38:19,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-12-18 19:38:19,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 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) [2021-12-18 19:38:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2021-12-18 19:38:19,484 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2021-12-18 19:38:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:19,484 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2021-12-18 19:38:19,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 111 states have (on average 2.855855855855856) internal successors, (317), 112 states have internal predecessors, (317), 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) [2021-12-18 19:38:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2021-12-18 19:38:19,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-18 19:38:19,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:19,485 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:19,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-18 19:38:19,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-18 19:38:19,695 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:38:19,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:19,695 INFO L85 PathProgramCache]: Analyzing trace with hash 795778285, now seen corresponding path program 38 times [2021-12-18 19:38:19,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:19,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111392284] [2021-12-18 19:38:19,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:19,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 26 proven. 1875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:21,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:21,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111392284] [2021-12-18 19:38:21,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111392284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:21,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338705569] [2021-12-18 19:38:21,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:38:21,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:21,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:21,072 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:21,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-18 19:38:21,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:38:21,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:21,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 151 conjunts are in the unsatisfiable core [2021-12-18 19:38:21,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:22,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:38:25,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:38:25,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 19:38:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 1128 proven. 773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:25,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:28,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:38:28,710 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 15 treesize of output 11 [2021-12-18 19:38:28,713 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 26 treesize of output 22 [2021-12-18 19:38:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 1128 proven. 773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:28,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338705569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:28,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:28,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 144 [2021-12-18 19:38:28,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129877586] [2021-12-18 19:38:28,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:28,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-12-18 19:38:28,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:28,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-12-18 19:38:28,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1353, Invalid=19239, Unknown=0, NotChecked=0, Total=20592 [2021-12-18 19:38:28,898 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 144 states, 144 states have (on average 2.5833333333333335) internal successors, (372), 144 states have internal predecessors, (372), 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) [2021-12-18 19:38:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:33,132 INFO L93 Difference]: Finished difference Result 225 states and 226 transitions. [2021-12-18 19:38:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-18 19:38:33,132 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.5833333333333335) internal successors, (372), 144 states have internal predecessors, (372), 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 160 [2021-12-18 19:38:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:33,133 INFO L225 Difference]: With dead ends: 225 [2021-12-18 19:38:33,133 INFO L226 Difference]: Without dead ends: 171 [2021-12-18 19:38:33,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5295 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=2058, Invalid=29094, Unknown=0, NotChecked=0, Total=31152 [2021-12-18 19:38:33,134 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 5501 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 5666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 5501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:33,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1882 Invalid, 5666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 5501 Invalid, 0 Unknown, 137 Unchecked, 1.7s Time] [2021-12-18 19:38:33,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-18 19:38:33,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2021-12-18 19:38:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 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) [2021-12-18 19:38:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2021-12-18 19:38:33,136 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 160 [2021-12-18 19:38:33,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:33,137 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2021-12-18 19:38:33,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.5833333333333335) internal successors, (372), 144 states have internal predecessors, (372), 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) [2021-12-18 19:38:33,137 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2021-12-18 19:38:33,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-18 19:38:33,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:33,138 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:33,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-18 19:38:33,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-18 19:38:33,351 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:38:33,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:33,352 INFO L85 PathProgramCache]: Analyzing trace with hash 227754537, now seen corresponding path program 39 times [2021-12-18 19:38:33,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:33,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065182096] [2021-12-18 19:38:33,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:33,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2055 backedges. 27 proven. 2028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:34,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:34,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065182096] [2021-12-18 19:38:34,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065182096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:34,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266247357] [2021-12-18 19:38:34,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:38:34,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:34,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:34,783 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:34,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-18 19:38:36,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-12-18 19:38:36,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:36,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 180 conjunts are in the unsatisfiable core [2021-12-18 19:38:36,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:38,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:38:38,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:38:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2055 backedges. 27 proven. 2028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:38,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:38,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:38:38,778 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 26 treesize of output 22 [2021-12-18 19:38:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2055 backedges. 27 proven. 2028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:39,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266247357] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:39,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:39,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 95 [2021-12-18 19:38:39,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760453074] [2021-12-18 19:38:39,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:39,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-18 19:38:39,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:39,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-18 19:38:39,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=8692, Unknown=0, NotChecked=0, Total=8930 [2021-12-18 19:38:39,137 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 95 states, 95 states have (on average 3.0) internal successors, (285), 95 states have internal predecessors, (285), 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) [2021-12-18 19:38:44,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:44,241 INFO L93 Difference]: Finished difference Result 230 states and 231 transitions. [2021-12-18 19:38:44,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-18 19:38:44,242 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.0) internal successors, (285), 95 states have internal predecessors, (285), 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 166 [2021-12-18 19:38:44,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:44,244 INFO L225 Difference]: With dead ends: 230 [2021-12-18 19:38:44,244 INFO L226 Difference]: Without dead ends: 174 [2021-12-18 19:38:44,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 293 SyntacticMatches, 4 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2406 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=789, Invalid=21861, Unknown=0, NotChecked=0, Total=22650 [2021-12-18 19:38:44,246 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 243 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 9473 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 9792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 9473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:44,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 2129 Invalid, 9792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 9473 Invalid, 0 Unknown, 134 Unchecked, 2.7s Time] [2021-12-18 19:38:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-18 19:38:44,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2021-12-18 19:38:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2021-12-18 19:38:44,256 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 166 [2021-12-18 19:38:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:44,256 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2021-12-18 19:38:44,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.0) internal successors, (285), 95 states have internal predecessors, (285), 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) [2021-12-18 19:38:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2021-12-18 19:38:44,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-18 19:38:44,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:44,257 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:44,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-18 19:38:44,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-18 19:38:44,471 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:38:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash 870340460, now seen corresponding path program 40 times [2021-12-18 19:38:44,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:44,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52769074] [2021-12-18 19:38:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:44,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1225 proven. 935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:45,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:45,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52769074] [2021-12-18 19:38:45,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52769074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:45,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369158336] [2021-12-18 19:38:45,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:38:45,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:45,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:45,720 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:45,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-18 19:38:45,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:38:45,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:45,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 163 conjunts are in the unsatisfiable core [2021-12-18 19:38:45,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:45,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:38:47,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:38:50,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:38:50,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-18 19:38:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1352 proven. 808 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:50,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:53,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:38:53,138 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 26 treesize of output 22 [2021-12-18 19:38:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1431 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:58,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369158336] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:58,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:58,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 60, 60] total 175 [2021-12-18 19:38:58,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901321134] [2021-12-18 19:38:58,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:58,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2021-12-18 19:38:58,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:58,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2021-12-18 19:38:58,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3063, Invalid=27737, Unknown=0, NotChecked=0, Total=30800 [2021-12-18 19:38:58,241 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 176 states, 175 states have (on average 2.88) internal successors, (504), 176 states have internal predecessors, (504), 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) [2021-12-18 19:39:03,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:03,351 INFO L93 Difference]: Finished difference Result 176 states and 177 transitions. [2021-12-18 19:39:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-18 19:39:03,352 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 175 states have (on average 2.88) internal successors, (504), 176 states have internal predecessors, (504), 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 170 [2021-12-18 19:39:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:03,352 INFO L225 Difference]: With dead ends: 176 [2021-12-18 19:39:03,352 INFO L226 Difference]: Without dead ends: 176 [2021-12-18 19:39:03,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8143 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=6795, Invalid=37937, Unknown=0, NotChecked=0, Total=44732 [2021-12-18 19:39:03,354 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 338 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 6890 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 7265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 6890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:03,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 1486 Invalid, 7265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 6890 Invalid, 0 Unknown, 82 Unchecked, 2.4s Time] [2021-12-18 19:39:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-18 19:39:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-12-18 19:39:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 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) [2021-12-18 19:39:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2021-12-18 19:39:03,356 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 170 [2021-12-18 19:39:03,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:03,356 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2021-12-18 19:39:03,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 175 states have (on average 2.88) internal successors, (504), 176 states have internal predecessors, (504), 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) [2021-12-18 19:39:03,357 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2021-12-18 19:39:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-18 19:39:03,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:03,357 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:03,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-18 19:39:03,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-18 19:39:03,558 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:39:03,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:03,558 INFO L85 PathProgramCache]: Analyzing trace with hash 331756190, now seen corresponding path program 41 times [2021-12-18 19:39:03,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:03,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270103821] [2021-12-18 19:39:03,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:03,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2272 backedges. 786 proven. 1486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:04,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:04,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270103821] [2021-12-18 19:39:04,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270103821] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:04,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369044739] [2021-12-18 19:39:04,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:39:04,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:04,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:04,768 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:04,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-18 19:39:05,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-12-18 19:39:05,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:05,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 129 conjunts are in the unsatisfiable core [2021-12-18 19:39:05,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:05,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:39:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2272 backedges. 841 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:08,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2272 backedges. 841 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:11,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369044739] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:11,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:11,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 149 [2021-12-18 19:39:11,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153101506] [2021-12-18 19:39:11,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:11,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2021-12-18 19:39:11,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:11,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-12-18 19:39:11,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4014, Invalid=18038, Unknown=0, NotChecked=0, Total=22052 [2021-12-18 19:39:11,250 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 149 states, 149 states have (on average 3.0671140939597317) internal successors, (457), 149 states have internal predecessors, (457), 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) [2021-12-18 19:39:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:12,655 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2021-12-18 19:39:12,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-18 19:39:12,655 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 3.0671140939597317) internal successors, (457), 149 states have internal predecessors, (457), 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 174 [2021-12-18 19:39:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:12,656 INFO L225 Difference]: With dead ends: 241 [2021-12-18 19:39:12,656 INFO L226 Difference]: Without dead ends: 182 [2021-12-18 19:39:12,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8050 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=6372, Invalid=25490, Unknown=0, NotChecked=0, Total=31862 [2021-12-18 19:39:12,657 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 282 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:12,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 91 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:39:12,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-18 19:39:12,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2021-12-18 19:39:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 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) [2021-12-18 19:39:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2021-12-18 19:39:12,659 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2021-12-18 19:39:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:12,660 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2021-12-18 19:39:12,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 3.0671140939597317) internal successors, (457), 149 states have internal predecessors, (457), 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) [2021-12-18 19:39:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2021-12-18 19:39:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-18 19:39:12,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:12,661 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:12,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:12,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:12,880 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:39:12,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:12,881 INFO L85 PathProgramCache]: Analyzing trace with hash 135746785, now seen corresponding path program 42 times [2021-12-18 19:39:12,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:12,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141226794] [2021-12-18 19:39:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:12,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 29 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:14,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:14,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141226794] [2021-12-18 19:39:14,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141226794] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:14,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730518208] [2021-12-18 19:39:14,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:39:14,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:14,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:14,494 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:14,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-18 19:39:18,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2021-12-18 19:39:18,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 192 conjunts are in the unsatisfiable core [2021-12-18 19:39:18,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:19,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:39:20,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:39:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 29 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:20,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:20,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:39:20,483 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 26 treesize of output 22 [2021-12-18 19:39:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 29 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:20,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730518208] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:20,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:20,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 101 [2021-12-18 19:39:20,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626723072] [2021-12-18 19:39:20,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:20,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-18 19:39:20,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:20,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-18 19:39:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=9848, Unknown=0, NotChecked=0, Total=10100 [2021-12-18 19:39:20,872 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 101 states, 101 states have (on average 3.01980198019802) internal successors, (305), 101 states have internal predecessors, (305), 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) [2021-12-18 19:39:26,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:26,646 INFO L93 Difference]: Finished difference Result 246 states and 247 transitions. [2021-12-18 19:39:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-18 19:39:26,646 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.01980198019802) internal successors, (305), 101 states have internal predecessors, (305), 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 178 [2021-12-18 19:39:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:26,647 INFO L225 Difference]: With dead ends: 246 [2021-12-18 19:39:26,647 INFO L226 Difference]: Without dead ends: 186 [2021-12-18 19:39:26,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 315 SyntacticMatches, 4 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=725, Invalid=25035, Unknown=0, NotChecked=0, Total=25760 [2021-12-18 19:39:26,649 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 200 mSDsluCounter, 2391 mSDsCounter, 0 mSdLazyCounter, 11025 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 2424 SdHoareTripleChecker+Invalid, 11299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 11025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:26,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 2424 Invalid, 11299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 11025 Invalid, 0 Unknown, 131 Unchecked, 3.1s Time] [2021-12-18 19:39:26,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-18 19:39:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2021-12-18 19:39:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 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) [2021-12-18 19:39:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2021-12-18 19:39:26,651 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 178 [2021-12-18 19:39:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:26,651 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2021-12-18 19:39:26,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.01980198019802) internal successors, (305), 101 states have internal predecessors, (305), 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) [2021-12-18 19:39:26,651 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2021-12-18 19:39:26,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-18 19:39:26,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:26,652 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:26,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:26,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-18 19:39:26,874 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:39:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:26,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1320656292, now seen corresponding path program 43 times [2021-12-18 19:39:26,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:26,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231569730] [2021-12-18 19:39:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:26,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1431 proven. 1063 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:28,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:28,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231569730] [2021-12-18 19:39:28,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231569730] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:28,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323372420] [2021-12-18 19:39:28,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:39:28,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:28,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:28,255 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:28,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-18 19:39:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:28,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 160 conjunts are in the unsatisfiable core [2021-12-18 19:39:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1540 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:30,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:32,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:39:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1540 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:32,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323372420] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:32,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:32,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 63, 63] total 126 [2021-12-18 19:39:32,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257240586] [2021-12-18 19:39:32,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:32,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-12-18 19:39:32,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:32,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-12-18 19:39:32,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=14460, Unknown=0, NotChecked=0, Total=16002 [2021-12-18 19:39:32,243 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand has 127 states, 126 states have (on average 2.8968253968253967) internal successors, (365), 127 states have internal predecessors, (365), 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) [2021-12-18 19:39:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:36,645 INFO L93 Difference]: Finished difference Result 186 states and 187 transitions. [2021-12-18 19:39:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-18 19:39:36,645 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 126 states have (on average 2.8968253968253967) internal successors, (365), 127 states have internal predecessors, (365), 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 182 [2021-12-18 19:39:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:36,646 INFO L225 Difference]: With dead ends: 186 [2021-12-18 19:39:36,646 INFO L226 Difference]: Without dead ends: 186 [2021-12-18 19:39:36,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5636 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=6288, Invalid=28494, Unknown=0, NotChecked=0, Total=34782 [2021-12-18 19:39:36,648 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 459 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 6050 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 6450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 6050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:36,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 1406 Invalid, 6450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 6050 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-18 19:39:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-18 19:39:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-12-18 19:39:36,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 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) [2021-12-18 19:39:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2021-12-18 19:39:36,650 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2021-12-18 19:39:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:36,650 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2021-12-18 19:39:36,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 126 states have (on average 2.8968253968253967) internal successors, (365), 127 states have internal predecessors, (365), 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) [2021-12-18 19:39:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2021-12-18 19:39:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-18 19:39:36,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:36,651 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:36,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:36,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:36,855 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:39:36,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:36,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2135343709, now seen corresponding path program 44 times [2021-12-18 19:39:36,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:36,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695187256] [2021-12-18 19:39:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:36,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 30 proven. 2523 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:38,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:38,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695187256] [2021-12-18 19:39:38,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695187256] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:38,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533414614] [2021-12-18 19:39:38,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:39:38,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:38,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:38,583 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:38,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-18 19:39:38,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:39:38,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:38,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 171 conjunts are in the unsatisfiable core [2021-12-18 19:39:38,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:40,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:39:44,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:44,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 19:39:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 1540 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:44,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:48,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:39:48,161 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 26 treesize of output 22 [2021-12-18 19:39:48,166 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 35 treesize of output 27 [2021-12-18 19:39:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 1540 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:48,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533414614] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:48,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:48,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 164 [2021-12-18 19:39:48,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451323340] [2021-12-18 19:39:48,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:48,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2021-12-18 19:39:48,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:48,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2021-12-18 19:39:48,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1735, Invalid=24997, Unknown=0, NotChecked=0, Total=26732 [2021-12-18 19:39:48,373 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 164 states, 164 states have (on average 2.6097560975609757) internal successors, (428), 164 states have internal predecessors, (428), 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) [2021-12-18 19:39:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:57,735 INFO L93 Difference]: Finished difference Result 257 states and 258 transitions. [2021-12-18 19:39:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-18 19:39:57,736 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.6097560975609757) internal successors, (428), 164 states have internal predecessors, (428), 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 184 [2021-12-18 19:39:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:57,736 INFO L225 Difference]: With dead ends: 257 [2021-12-18 19:39:57,737 INFO L226 Difference]: Without dead ends: 195 [2021-12-18 19:39:57,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 297 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6886 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=2602, Invalid=37598, Unknown=0, NotChecked=0, Total=40200 [2021-12-18 19:39:57,738 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 2348 mSDsCounter, 0 mSdLazyCounter, 6734 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2382 SdHoareTripleChecker+Invalid, 7206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 6734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 440 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:57,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2382 Invalid, 7206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 6734 Invalid, 0 Unknown, 440 Unchecked, 2.1s Time] [2021-12-18 19:39:57,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-18 19:39:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2021-12-18 19:39:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 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) [2021-12-18 19:39:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2021-12-18 19:39:57,740 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 184 [2021-12-18 19:39:57,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:57,740 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2021-12-18 19:39:57,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.6097560975609757) internal successors, (428), 164 states have internal predecessors, (428), 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) [2021-12-18 19:39:57,741 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2021-12-18 19:39:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-18 19:39:57,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:57,741 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:57,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:57,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-18 19:39:57,948 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:39:57,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:57,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1634176359, now seen corresponding path program 45 times [2021-12-18 19:39:57,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:57,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841086231] [2021-12-18 19:39:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:57,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2731 backedges. 31 proven. 2700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:59,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:59,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841086231] [2021-12-18 19:39:59,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841086231] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:59,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294467975] [2021-12-18 19:39:59,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:39:59,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:59,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:59,836 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:59,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-18 19:40:07,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-12-18 19:40:07,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:07,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 204 conjunts are in the unsatisfiable core [2021-12-18 19:40:07,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:09,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:40:09,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:40:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2731 backedges. 31 proven. 2700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:40:09,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:10,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:40:10,008 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 26 treesize of output 22 [2021-12-18 19:40:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2731 backedges. 31 proven. 2700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:40:10,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294467975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:10,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:10,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 107 [2021-12-18 19:40:10,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032710648] [2021-12-18 19:40:10,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:10,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-18 19:40:10,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:10,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-18 19:40:10,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=11076, Unknown=0, NotChecked=0, Total=11342 [2021-12-18 19:40:10,454 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand has 107 states, 107 states have (on average 3.0373831775700935) internal successors, (325), 107 states have internal predecessors, (325), 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) [2021-12-18 19:40:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:17,518 INFO L93 Difference]: Finished difference Result 262 states and 263 transitions. [2021-12-18 19:40:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-18 19:40:17,518 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.0373831775700935) internal successors, (325), 107 states have internal predecessors, (325), 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 190 [2021-12-18 19:40:17,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:17,519 INFO L225 Difference]: With dead ends: 262 [2021-12-18 19:40:17,519 INFO L226 Difference]: Without dead ends: 198 [2021-12-18 19:40:17,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 337 SyntacticMatches, 4 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3064 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=893, Invalid=28177, Unknown=0, NotChecked=0, Total=29070 [2021-12-18 19:40:17,520 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 204 mSDsluCounter, 2773 mSDsCounter, 0 mSdLazyCounter, 12846 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 2808 SdHoareTripleChecker+Invalid, 12998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 12846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:17,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 2808 Invalid, 12998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 12846 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-18 19:40:17,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-18 19:40:17,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2021-12-18 19:40:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 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) [2021-12-18 19:40:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2021-12-18 19:40:17,522 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 190 [2021-12-18 19:40:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:17,522 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2021-12-18 19:40:17,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.0373831775700935) internal successors, (325), 107 states have internal predecessors, (325), 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) [2021-12-18 19:40:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2021-12-18 19:40:17,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-18 19:40:17,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:17,523 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:17,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:17,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:17,723 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:40:17,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:17,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2094706396, now seen corresponding path program 46 times [2021-12-18 19:40:17,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:17,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567967874] [2021-12-18 19:40:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:17,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 1653 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:40:19,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:19,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567967874] [2021-12-18 19:40:19,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567967874] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:19,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261235750] [2021-12-18 19:40:19,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:40:19,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:19,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:19,321 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:19,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-18 19:40:19,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:40:19,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:19,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 183 conjunts are in the unsatisfiable core [2021-12-18 19:40:19,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:19,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:40:20,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 19:40:22,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:40:22,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-18 19:40:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 1800 proven. 1052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:40:22,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:26,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:40:26,197 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 26 treesize of output 22 [2021-12-18 19:40:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 1891 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:40:32,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261235750] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:32,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:32,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 68, 68] total 170 [2021-12-18 19:40:32,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848435970] [2021-12-18 19:40:32,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:32,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2021-12-18 19:40:32,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:32,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2021-12-18 19:40:32,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3024, Invalid=26046, Unknown=0, NotChecked=0, Total=29070 [2021-12-18 19:40:32,225 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 171 states, 170 states have (on average 2.7058823529411766) internal successors, (460), 171 states have internal predecessors, (460), 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) [2021-12-18 19:40:39,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:39,158 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2021-12-18 19:40:39,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-18 19:40:39,158 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 170 states have (on average 2.7058823529411766) internal successors, (460), 171 states have internal predecessors, (460), 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 194 [2021-12-18 19:40:39,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:39,159 INFO L225 Difference]: With dead ends: 200 [2021-12-18 19:40:39,159 INFO L226 Difference]: Without dead ends: 200 [2021-12-18 19:40:39,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 283 SyntacticMatches, 2 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7356 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=6593, Invalid=37297, Unknown=0, NotChecked=0, Total=43890 [2021-12-18 19:40:39,161 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 384 mSDsluCounter, 2173 mSDsCounter, 0 mSdLazyCounter, 10158 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 10569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 10158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:39,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 2208 Invalid, 10569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 10158 Invalid, 0 Unknown, 94 Unchecked, 3.7s Time] [2021-12-18 19:40:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-18 19:40:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-12-18 19:40:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 198 states have internal predecessors, (200), 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) [2021-12-18 19:40:39,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2021-12-18 19:40:39,168 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 194 [2021-12-18 19:40:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:39,168 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2021-12-18 19:40:39,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 170 states have (on average 2.7058823529411766) internal successors, (460), 171 states have internal predecessors, (460), 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) [2021-12-18 19:40:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2021-12-18 19:40:39,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-18 19:40:39,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:39,169 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:39,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:39,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:39,387 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:40:39,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash 535253518, now seen corresponding path program 47 times [2021-12-18 19:40:39,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:39,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361084175] [2021-12-18 19:40:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:39,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2980 backedges. 1026 proven. 1954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:40:40,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:40,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361084175] [2021-12-18 19:40:40,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361084175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:40,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789513899] [2021-12-18 19:40:40,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:40:40,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:40,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:40,877 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:40,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-18 19:40:42,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-12-18 19:40:42,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:42,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 145 conjunts are in the unsatisfiable core [2021-12-18 19:40:42,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:42,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:40:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2980 backedges. 1089 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:40:46,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2980 backedges. 1089 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:40:49,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789513899] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:49,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:49,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 168 [2021-12-18 19:40:49,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051432438] [2021-12-18 19:40:49,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:49,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2021-12-18 19:40:49,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:49,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2021-12-18 19:40:49,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4627, Invalid=23429, Unknown=0, NotChecked=0, Total=28056 [2021-12-18 19:40:49,262 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand has 168 states, 168 states have (on average 3.1011904761904763) internal successors, (521), 168 states have internal predecessors, (521), 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) [2021-12-18 19:40:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:52,574 INFO L93 Difference]: Finished difference Result 273 states and 274 transitions. [2021-12-18 19:40:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-18 19:40:52,574 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 3.1011904761904763) internal successors, (521), 168 states have internal predecessors, (521), 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 198 [2021-12-18 19:40:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:52,575 INFO L225 Difference]: With dead ends: 273 [2021-12-18 19:40:52,575 INFO L226 Difference]: Without dead ends: 206 [2021-12-18 19:40:52,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14652 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=9685, Invalid=44371, Unknown=0, NotChecked=0, Total=54056 [2021-12-18 19:40:52,577 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 215 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:52,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 127 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:40:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-18 19:40:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2021-12-18 19:40:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 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) [2021-12-18 19:40:52,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2021-12-18 19:40:52,579 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 198 [2021-12-18 19:40:52,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:52,579 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2021-12-18 19:40:52,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 3.1011904761904763) internal successors, (521), 168 states have internal predecessors, (521), 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) [2021-12-18 19:40:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2021-12-18 19:40:52,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-18 19:40:52,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:52,581 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:52,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:52,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-18 19:40:52,802 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:40:52,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:52,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1947638609, now seen corresponding path program 48 times [2021-12-18 19:40:52,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:52,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77756369] [2021-12-18 19:40:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:52,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 33 proven. 3072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:40:54,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:54,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77756369] [2021-12-18 19:40:54,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77756369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:54,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543679010] [2021-12-18 19:40:54,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:40:54,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:54,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:54,859 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:54,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-18 19:41:01,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2021-12-18 19:41:01,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:01,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 216 conjunts are in the unsatisfiable core [2021-12-18 19:41:01,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:03,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:41:03,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:41:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 33 proven. 3072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:03,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:04,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:41:04,247 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 26 treesize of output 22 [2021-12-18 19:41:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 33 proven. 3072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:04,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543679010] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:04,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:04,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 113 [2021-12-18 19:41:04,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542293063] [2021-12-18 19:41:04,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:04,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-12-18 19:41:04,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:04,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-12-18 19:41:04,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=12376, Unknown=0, NotChecked=0, Total=12656 [2021-12-18 19:41:04,692 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand has 113 states, 113 states have (on average 3.0530973451327434) internal successors, (345), 113 states have internal predecessors, (345), 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) [2021-12-18 19:41:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:12,968 INFO L93 Difference]: Finished difference Result 278 states and 279 transitions. [2021-12-18 19:41:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-18 19:41:12,969 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.0530973451327434) internal successors, (345), 113 states have internal predecessors, (345), 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 202 [2021-12-18 19:41:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:12,969 INFO L225 Difference]: With dead ends: 278 [2021-12-18 19:41:12,969 INFO L226 Difference]: Without dead ends: 210 [2021-12-18 19:41:12,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 359 SyntacticMatches, 4 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=945, Invalid=31635, Unknown=0, NotChecked=0, Total=32580 [2021-12-18 19:41:12,971 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 178 mSDsluCounter, 3421 mSDsCounter, 0 mSdLazyCounter, 15875 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 16005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 15875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:12,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 3458 Invalid, 16005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 15875 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-18 19:41:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-18 19:41:12,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2021-12-18 19:41:12,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 states have internal predecessors, (208), 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) [2021-12-18 19:41:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2021-12-18 19:41:12,979 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 202 [2021-12-18 19:41:12,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:12,979 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2021-12-18 19:41:12,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.0530973451327434) internal successors, (345), 113 states have internal predecessors, (345), 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) [2021-12-18 19:41:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2021-12-18 19:41:12,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-18 19:41:12,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:12,980 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:13,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-18 19:41:13,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-18 19:41:13,187 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:41:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:13,188 INFO L85 PathProgramCache]: Analyzing trace with hash 556370708, now seen corresponding path program 49 times [2021-12-18 19:41:13,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:13,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757170605] [2021-12-18 19:41:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:13,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 1891 proven. 1343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:14,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:14,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757170605] [2021-12-18 19:41:14,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757170605] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:14,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308175576] [2021-12-18 19:41:14,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:41:14,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:14,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:14,965 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:14,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-18 19:41:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:15,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 180 conjunts are in the unsatisfiable core [2021-12-18 19:41:15,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 2016 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:16,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:19,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:41:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 2016 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:19,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308175576] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:19,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:19,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 71, 71] total 143 [2021-12-18 19:41:19,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576645148] [2021-12-18 19:41:19,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:19,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-12-18 19:41:19,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:19,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-12-18 19:41:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2514, Invalid=18078, Unknown=0, NotChecked=0, Total=20592 [2021-12-18 19:41:19,233 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand has 144 states, 143 states have (on average 2.888111888111888) internal successors, (413), 144 states have internal predecessors, (413), 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) [2021-12-18 19:41:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:23,020 INFO L93 Difference]: Finished difference Result 210 states and 211 transitions. [2021-12-18 19:41:23,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-18 19:41:23,020 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 143 states have (on average 2.888111888111888) internal successors, (413), 144 states have internal predecessors, (413), 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 206 [2021-12-18 19:41:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:23,027 INFO L225 Difference]: With dead ends: 210 [2021-12-18 19:41:23,027 INFO L226 Difference]: Without dead ends: 210 [2021-12-18 19:41:23,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 335 SyntacticMatches, 3 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8820 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5808, Invalid=26412, Unknown=0, NotChecked=0, Total=32220 [2021-12-18 19:41:23,029 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 549 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 7641 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 8122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 7641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:23,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 1739 Invalid, 8122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 7641 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-18 19:41:23,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-18 19:41:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-12-18 19:41:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 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) [2021-12-18 19:41:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2021-12-18 19:41:23,031 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2021-12-18 19:41:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:23,032 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2021-12-18 19:41:23,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 143 states have (on average 2.888111888111888) internal successors, (413), 144 states have internal predecessors, (413), 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) [2021-12-18 19:41:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2021-12-18 19:41:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-18 19:41:23,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:23,033 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:23,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-12-18 19:41:23,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-18 19:41:23,247 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:41:23,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:23,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2096305101, now seen corresponding path program 50 times [2021-12-18 19:41:23,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:23,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319623037] [2021-12-18 19:41:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:23,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3301 backedges. 34 proven. 3267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:25,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:25,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319623037] [2021-12-18 19:41:25,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319623037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:25,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088854127] [2021-12-18 19:41:25,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:41:25,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:25,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:25,407 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:25,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-18 19:41:25,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:41:25,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:25,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 191 conjunts are in the unsatisfiable core [2021-12-18 19:41:25,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:27,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:41:32,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:41:32,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 19:41:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3301 backedges. 2016 proven. 1285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:32,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:37,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 19:41:37,480 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 26 treesize of output 22 [2021-12-18 19:41:37,482 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 35 treesize of output 27 [2021-12-18 19:41:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3301 backedges. 2016 proven. 1285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:37,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088854127] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:37,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:37,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 184 [2021-12-18 19:41:37,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742037778] [2021-12-18 19:41:37,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:37,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2021-12-18 19:41:37,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:37,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2021-12-18 19:41:37,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2165, Invalid=31507, Unknown=0, NotChecked=0, Total=33672 [2021-12-18 19:41:37,753 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 184 states, 184 states have (on average 2.630434782608696) internal successors, (484), 184 states have internal predecessors, (484), 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) [2021-12-18 19:41:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:44,696 INFO L93 Difference]: Finished difference Result 289 states and 290 transitions. [2021-12-18 19:41:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-12-18 19:41:44,696 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 184 states have (on average 2.630434782608696) internal successors, (484), 184 states have internal predecessors, (484), 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 208 [2021-12-18 19:41:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:44,697 INFO L225 Difference]: With dead ends: 289 [2021-12-18 19:41:44,697 INFO L226 Difference]: Without dead ends: 219 [2021-12-18 19:41:44,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 337 SyntacticMatches, 2 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8683 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=3210, Invalid=47190, Unknown=0, NotChecked=0, Total=50400 [2021-12-18 19:41:44,699 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 2976 mSDsCounter, 0 mSdLazyCounter, 8702 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3014 SdHoareTripleChecker+Invalid, 9139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 8702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:44,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 3014 Invalid, 9139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 8702 Invalid, 0 Unknown, 401 Unchecked, 2.8s Time] [2021-12-18 19:41:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-18 19:41:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2021-12-18 19:41:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 states have internal predecessors, (216), 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) [2021-12-18 19:41:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2021-12-18 19:41:44,701 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 208 [2021-12-18 19:41:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:44,701 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2021-12-18 19:41:44,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 184 states have (on average 2.630434782608696) internal successors, (484), 184 states have internal predecessors, (484), 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) [2021-12-18 19:41:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2021-12-18 19:41:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-18 19:41:44,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:44,702 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:44,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-12-18 19:41:44,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-18 19:41:44,902 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-18 19:41:44,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:44,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1532088073, now seen corresponding path program 51 times [2021-12-18 19:41:44,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:44,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914953334] [2021-12-18 19:41:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:44,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3503 backedges. 35 proven. 3468 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:47,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:47,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914953334] [2021-12-18 19:41:47,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914953334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:47,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657329872] [2021-12-18 19:41:47,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:41:47,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:47,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:47,226 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:47,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-18 19:42:00,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-12-18 19:42:00,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:00,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-18 19:42:00,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:00,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:42:00,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 19:42:00,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:42:00,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-18 19:42:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3503 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 3434 trivial. 0 not checked. [2021-12-18 19:42:00,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:04,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-18 19:42:04,700 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 20 treesize of output 18 [2021-12-18 19:42:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3503 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 3434 trivial. 0 not checked. [2021-12-18 19:42:05,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657329872] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:05,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:05,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 6, 6] total 86 [2021-12-18 19:42:05,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912528489] [2021-12-18 19:42:05,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:05,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-18 19:42:05,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:05,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-18 19:42:05,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7133, Unknown=0, NotChecked=0, Total=7310 [2021-12-18 19:42:05,759 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand has 86 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 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) [2021-12-18 19:42:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:17,227 INFO L93 Difference]: Finished difference Result 293 states and 294 transitions. [2021-12-18 19:42:17,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-12-18 19:42:17,228 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 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) Word has length 214 [2021-12-18 19:42:17,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:17,228 INFO L225 Difference]: With dead ends: 293 [2021-12-18 19:42:17,228 INFO L226 Difference]: Without dead ends: 0 [2021-12-18 19:42:17,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 388 SyntacticMatches, 31 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5995 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=1979, Invalid=37027, Unknown=0, NotChecked=0, Total=39006 [2021-12-18 19:42:17,230 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 142 mSDsluCounter, 2849 mSDsCounter, 0 mSdLazyCounter, 13058 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 2887 SdHoareTripleChecker+Invalid, 13419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 13058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:17,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 2887 Invalid, 13419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 13058 Invalid, 0 Unknown, 241 Unchecked, 4.0s Time] [2021-12-18 19:42:17,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-18 19:42:17,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-18 19:42:17,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-12-18 19:42:17,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-18 19:42:17,231 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 214 [2021-12-18 19:42:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:17,231 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-18 19:42:17,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 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) [2021-12-18 19:42:17,231 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-18 19:42:17,231 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-18 19:42:17,233 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (6 of 7 remaining) [2021-12-18 19:42:17,234 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (5 of 7 remaining) [2021-12-18 19:42:17,234 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (4 of 7 remaining) [2021-12-18 19:42:17,234 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (3 of 7 remaining) [2021-12-18 19:42:17,234 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (2 of 7 remaining) [2021-12-18 19:42:17,234 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (1 of 7 remaining) [2021-12-18 19:42:17,234 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2021-12-18 19:42:17,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-18 19:42:17,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:17,450 INFO L732 BasicCegarLoop]: Path program histogram: [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:17,451 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 19:42:17,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:42:17 BoogieIcfgContainer [2021-12-18 19:42:17,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 19:42:17,453 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 19:42:17,453 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 19:42:17,453 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 19:42:17,453 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:29" (3/4) ... [2021-12-18 19:42:17,455 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-18 19:42:17,463 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-12-18 19:42:17,463 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-18 19:42:17,463 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-18 19:42:17,463 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-18 19:42:17,486 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-18 19:42:17,486 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 19:42:17,487 INFO L158 Benchmark]: Toolchain (without parser) took 409080.23ms. Allocated memory was 107.0MB in the beginning and 297.8MB in the end (delta: 190.8MB). Free memory was 77.8MB in the beginning and 156.1MB in the end (delta: -78.2MB). Peak memory consumption was 111.9MB. Max. memory is 16.1GB. [2021-12-18 19:42:17,487 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 107.0MB. Free memory is still 64.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 19:42:17,487 INFO L158 Benchmark]: CACSL2BoogieTranslator took 329.64ms. Allocated memory is still 107.0MB. Free memory was 77.5MB in the beginning and 76.8MB in the end (delta: 765.4kB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2021-12-18 19:42:17,487 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.29ms. Allocated memory is still 107.0MB. Free memory was 76.8MB in the beginning and 74.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 19:42:17,487 INFO L158 Benchmark]: Boogie Preprocessor took 35.76ms. Allocated memory is still 107.0MB. Free memory was 74.9MB in the beginning and 73.9MB in the end (delta: 980.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 19:42:17,487 INFO L158 Benchmark]: RCFGBuilder took 274.01ms. Allocated memory is still 107.0MB. Free memory was 73.6MB in the beginning and 63.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-18 19:42:17,487 INFO L158 Benchmark]: TraceAbstraction took 408353.24ms. Allocated memory was 107.0MB in the beginning and 297.8MB in the end (delta: 190.8MB). Free memory was 62.8MB in the beginning and 158.7MB in the end (delta: -96.0MB). Peak memory consumption was 95.8MB. Max. memory is 16.1GB. [2021-12-18 19:42:17,488 INFO L158 Benchmark]: Witness Printer took 33.82ms. Allocated memory is still 297.8MB. Free memory was 158.7MB in the beginning and 156.1MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 19:42:17,488 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 107.0MB. Free memory is still 64.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 329.64ms. Allocated memory is still 107.0MB. Free memory was 77.5MB in the beginning and 76.8MB in the end (delta: 765.4kB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.29ms. Allocated memory is still 107.0MB. Free memory was 76.8MB in the beginning and 74.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.76ms. Allocated memory is still 107.0MB. Free memory was 74.9MB in the beginning and 73.9MB in the end (delta: 980.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 274.01ms. Allocated memory is still 107.0MB. Free memory was 73.6MB in the beginning and 63.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 408353.24ms. Allocated memory was 107.0MB in the beginning and 297.8MB in the end (delta: 190.8MB). Free memory was 62.8MB in the beginning and 158.7MB in the end (delta: -96.0MB). Peak memory consumption was 95.8MB. Max. memory is 16.1GB. * Witness Printer took 33.82ms. Allocated memory is still 297.8MB. Free memory was 158.7MB in the beginning and 156.1MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 408.3s, OverallIterations: 61, TraceHistogramMax: 35, PathProgramHistogramMax: 51, EmptinessCheckTime: 0.0s, AutomataDifference: 138.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8272 SdHoareTripleChecker+Valid, 61.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8272 mSDsluCounter, 48506 SdHoareTripleChecker+Invalid, 51.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3826 IncrementalHoareTripleChecker+Unchecked, 47375 mSDsCounter, 5452 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 197527 IncrementalHoareTripleChecker+Invalid, 206805 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5452 mSolverCounterUnsat, 1131 mSDtfsCounter, 197527 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15427 GetRequests, 9266 SyntacticMatches, 144 SemanticMatches, 6017 ConstructedPredicates, 0 IntricatePredicates, 30 DeprecatedPredicates, 156966 ImplicationChecksByTransitivity, 231.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=215occurred in iteration=60, InterpolantAutomatonStates: 2720, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 61 MinimizatonAttempts, 197 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 42.3s SatisfiabilityAnalysisTime, 210.8s InterpolantComputationTime, 11684 NumberOfCodeBlocks, 11540 NumberOfCodeBlocksAsserted, 597 NumberOfCheckSat, 17325 ConstructedInterpolants, 459 QuantifiedInterpolants, 183439 SizeOfPredicates, 687 NumberOfNonLiveVariables, 24882 ConjunctsInSsa, 5640 ConjunctsInUnsatCore, 165 InterpolantComputations, 9 PerfectInterpolantSequences, 65796/183986 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-18 19:42:17,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE