./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3a877d22 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/cstrcmp-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 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 13:55:37,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 13:55:37,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 13:55:37,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 13:55:37,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 13:55:37,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 13:55:37,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 13:55:37,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 13:55:37,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 13:55:37,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 13:55:37,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 13:55:37,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 13:55:37,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 13:55:37,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 13:55:37,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 13:55:37,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 13:55:37,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 13:55:37,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 13:55:37,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 13:55:37,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 13:55:37,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 13:55:37,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 13:55:37,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 13:55:37,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 13:55:37,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 13:55:37,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 13:55:37,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 13:55:37,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 13:55:37,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 13:55:37,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 13:55:37,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 13:55:37,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 13:55:37,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 13:55:37,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 13:55:37,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 13:55:37,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 13:55:37,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 13:55:37,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 13:55:37,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 13:55:37,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 13:55:37,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 13:55:37,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-15 13:55:37,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 13:55:37,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 13:55:37,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 13:55:37,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 13:55:37,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 13:55:37,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 13:55:37,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 13:55:37,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 13:55:37,954 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 13:55:37,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 13:55:37,955 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 13:55:37,955 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 13:55:37,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 13:55:37,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 13:55:37,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 13:55:37,955 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 13:55:37,955 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 13:55:37,956 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 13:55:37,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 13:55:37,956 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 13:55:37,956 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 13:55:37,956 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 13:55:37,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 13:55:37,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 13:55:37,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 13:55:37,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:55:37,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 13:55:37,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 13:55:37,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 13:55:37,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 13:55:37,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 13:55:37,958 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 [2021-12-15 13:55:38,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 13:55:38,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 13:55:38,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 13:55:38,230 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 13:55:38,230 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 13:55:38,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2021-12-15 13:55:38,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aad9a0c4b/dcbf5a53d3b749279a0e8972e733fc97/FLAGe84d44ca1 [2021-12-15 13:55:38,643 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 13:55:38,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2021-12-15 13:55:38,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aad9a0c4b/dcbf5a53d3b749279a0e8972e733fc97/FLAGe84d44ca1 [2021-12-15 13:55:38,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aad9a0c4b/dcbf5a53d3b749279a0e8972e733fc97 [2021-12-15 13:55:38,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 13:55:38,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 13:55:38,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 13:55:38,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 13:55:38,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 13:55:38,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:55:38" (1/1) ... [2021-12-15 13:55:38,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d78bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:38, skipping insertion in model container [2021-12-15 13:55:38,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:55:38" (1/1) ... [2021-12-15 13:55:38,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 13:55:38,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:55:38,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:55:38,960 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 13:55:38,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:55:39,010 INFO L208 MainTranslator]: Completed translation [2021-12-15 13:55:39,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:39 WrapperNode [2021-12-15 13:55:39,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 13:55:39,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 13:55:39,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 13:55:39,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 13:55:39,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:39" (1/1) ... [2021-12-15 13:55:39,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:39" (1/1) ... [2021-12-15 13:55:39,060 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2021-12-15 13:55:39,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 13:55:39,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 13:55:39,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 13:55:39,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 13:55:39,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:39" (1/1) ... [2021-12-15 13:55:39,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:39" (1/1) ... [2021-12-15 13:55:39,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:39" (1/1) ... [2021-12-15 13:55:39,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:39" (1/1) ... [2021-12-15 13:55:39,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:39" (1/1) ... [2021-12-15 13:55:39,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:39" (1/1) ... [2021-12-15 13:55:39,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:39" (1/1) ... [2021-12-15 13:55:39,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 13:55:39,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 13:55:39,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 13:55:39,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 13:55:39,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:39" (1/1) ... [2021-12-15 13:55:39,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:55:39,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:39,114 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) [2021-12-15 13:55:39,120 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 [2021-12-15 13:55:39,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 13:55:39,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 13:55:39,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 13:55:39,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 13:55:39,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 13:55:39,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 13:55:39,194 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 13:55:39,196 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 13:55:39,357 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 13:55:39,362 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 13:55:39,362 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-15 13:55:39,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:55:39 BoogieIcfgContainer [2021-12-15 13:55:39,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 13:55:39,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 13:55:39,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 13:55:39,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 13:55:39,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 01:55:38" (1/3) ... [2021-12-15 13:55:39,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b15147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:55:39, skipping insertion in model container [2021-12-15 13:55:39,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:39" (2/3) ... [2021-12-15 13:55:39,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b15147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:55:39, skipping insertion in model container [2021-12-15 13:55:39,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:55:39" (3/3) ... [2021-12-15 13:55:39,376 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcmp-alloca-2.i [2021-12-15 13:55:39,379 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 13:55:39,380 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-15 13:55:39,417 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 13:55:39,422 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 [2021-12-15 13:55:39,422 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-15 13:55:39,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 1.878787878787879) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:39,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 13:55:39,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:39,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:39,442 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:39,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:39,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-15 13:55:39,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:39,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487647084] [2021-12-15 13:55:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:39,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:39,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:39,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487647084] [2021-12-15 13:55:39,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487647084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:39,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:39,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:55:39,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197564228] [2021-12-15 13:55:39,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:39,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:39,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:39,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:39,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:39,693 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 1.878787878787879) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 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 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:39,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:39,747 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2021-12-15 13:55:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:39,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-15 13:55:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:39,755 INFO L225 Difference]: With dead ends: 98 [2021-12-15 13:55:39,756 INFO L226 Difference]: Without dead ends: 94 [2021-12-15 13:55:39,758 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 [2021-12-15 13:55:39,761 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 48 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 154 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 [2021-12-15 13:55:39,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 154 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:39,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-15 13:55:39,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2021-12-15 13:55:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-12-15 13:55:39,794 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 7 [2021-12-15 13:55:39,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:39,795 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-12-15 13:55:39,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-12-15 13:55:39,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 13:55:39,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:39,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:39,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 13:55:39,796 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:39,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:39,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-15 13:55:39,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:39,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710000140] [2021-12-15 13:55:39,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:39,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:39,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:39,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710000140] [2021-12-15 13:55:39,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710000140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:39,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:39,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:55:39,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734337556] [2021-12-15 13:55:39,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:39,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:55:39,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:39,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:55:39,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:55:39,897 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:39,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:39,933 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-12-15 13:55:39,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:55:39,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-15 13:55:39,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:39,935 INFO L225 Difference]: With dead ends: 52 [2021-12-15 13:55:39,936 INFO L226 Difference]: Without dead ends: 52 [2021-12-15 13:55:39,936 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 [2021-12-15 13:55:39,940 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:39,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-15 13:55:39,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-15 13:55:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-12-15 13:55:39,953 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 7 [2021-12-15 13:55:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:39,953 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-12-15 13:55:39,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:39,954 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-12-15 13:55:39,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 13:55:39,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:39,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:39,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 13:55:39,955 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:39,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-15 13:55:39,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:39,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166892609] [2021-12-15 13:55:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:39,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:40,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:40,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166892609] [2021-12-15 13:55:40,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166892609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:40,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:40,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:40,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704008313] [2021-12-15 13:55:40,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:40,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:40,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:40,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:40,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:40,039 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:40,124 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-12-15 13:55:40,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:40,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-15 13:55:40,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:40,125 INFO L225 Difference]: With dead ends: 95 [2021-12-15 13:55:40,125 INFO L226 Difference]: Without dead ends: 95 [2021-12-15 13:55:40,126 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 [2021-12-15 13:55:40,126 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 48 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:40,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 94 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-15 13:55:40,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 54. [2021-12-15 13:55:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-12-15 13:55:40,130 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 7 [2021-12-15 13:55:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:40,130 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-12-15 13:55:40,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,131 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-12-15 13:55:40,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 13:55:40,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:40,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:40,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 13:55:40,132 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:40,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:40,132 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-15 13:55:40,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:40,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022042139] [2021-12-15 13:55:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:40,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:40,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:40,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022042139] [2021-12-15 13:55:40,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022042139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:40,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:40,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:40,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306733225] [2021-12-15 13:55:40,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:40,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:40,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:40,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:40,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:40,169 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:40,193 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-12-15 13:55:40,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:40,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-15 13:55:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:40,194 INFO L225 Difference]: With dead ends: 53 [2021-12-15 13:55:40,194 INFO L226 Difference]: Without dead ends: 53 [2021-12-15 13:55:40,195 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 [2021-12-15 13:55:40,196 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:40,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 37 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-15 13:55:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-15 13:55:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-15 13:55:40,199 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 9 [2021-12-15 13:55:40,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:40,199 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-15 13:55:40,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-15 13:55:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 13:55:40,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:40,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:40,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 13:55:40,200 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:40,201 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-15 13:55:40,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:40,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775694399] [2021-12-15 13:55:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:40,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:40,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:40,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775694399] [2021-12-15 13:55:40,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775694399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:40,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:40,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:55:40,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012875592] [2021-12-15 13:55:40,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:40,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:40,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:40,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:40,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:40,228 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:40,240 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-12-15 13:55:40,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:40,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-15 13:55:40,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:40,241 INFO L225 Difference]: With dead ends: 96 [2021-12-15 13:55:40,241 INFO L226 Difference]: Without dead ends: 96 [2021-12-15 13:55:40,241 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 [2021-12-15 13:55:40,242 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 102 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 [2021-12-15 13:55:40,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 102 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:40,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-15 13:55:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2021-12-15 13:55:40,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.5625) internal successors, (75), 63 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-12-15 13:55:40,246 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 9 [2021-12-15 13:55:40,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:40,246 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-12-15 13:55:40,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,247 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-12-15 13:55:40,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 13:55:40,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:40,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:40,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 13:55:40,248 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:40,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:40,248 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-15 13:55:40,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:40,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918798707] [2021-12-15 13:55:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:40,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:40,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:40,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918798707] [2021-12-15 13:55:40,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918798707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:40,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:40,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:55:40,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895395043] [2021-12-15 13:55:40,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:40,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:55:40,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:40,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:55:40,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:55:40,267 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:40,285 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2021-12-15 13:55:40,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:55:40,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-15 13:55:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:40,286 INFO L225 Difference]: With dead ends: 62 [2021-12-15 13:55:40,286 INFO L226 Difference]: Without dead ends: 62 [2021-12-15 13:55:40,286 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 [2021-12-15 13:55:40,287 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:40,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 38 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-15 13:55:40,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-12-15 13:55:40,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 61 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) [2021-12-15 13:55:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-12-15 13:55:40,290 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 9 [2021-12-15 13:55:40,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:40,291 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-12-15 13:55:40,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-12-15 13:55:40,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 13:55:40,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:40,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:40,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 13:55:40,292 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:40,292 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-15 13:55:40,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:40,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851311877] [2021-12-15 13:55:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:40,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:40,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:40,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851311877] [2021-12-15 13:55:40,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851311877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:40,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:40,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:55:40,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674031599] [2021-12-15 13:55:40,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:40,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:55:40,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:40,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:55:40,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:55:40,338 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:40,395 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2021-12-15 13:55:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:55:40,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-15 13:55:40,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:40,397 INFO L225 Difference]: With dead ends: 96 [2021-12-15 13:55:40,397 INFO L226 Difference]: Without dead ends: 96 [2021-12-15 13:55:40,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 13:55:40,398 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 82 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:40,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 88 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:40,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-15 13:55:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2021-12-15 13:55:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.52) internal successors, (76), 63 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) [2021-12-15 13:55:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-12-15 13:55:40,411 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 9 [2021-12-15 13:55:40,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:40,412 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-12-15 13:55:40,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-12-15 13:55:40,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 13:55:40,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:40,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:40,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 13:55:40,413 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:40,414 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-15 13:55:40,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:40,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226711611] [2021-12-15 13:55:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:40,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:40,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:40,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226711611] [2021-12-15 13:55:40,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226711611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:40,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:40,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:40,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409859334] [2021-12-15 13:55:40,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:40,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:40,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:40,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:40,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:40,464 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2021-12-15 13:55:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:40,498 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2021-12-15 13:55:40,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:40,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 [2021-12-15 13:55:40,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:40,499 INFO L225 Difference]: With dead ends: 63 [2021-12-15 13:55:40,499 INFO L226 Difference]: Without dead ends: 63 [2021-12-15 13:55:40,500 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 [2021-12-15 13:55:40,500 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 85 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:40,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-15 13:55:40,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-15 13:55:40,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.5) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-12-15 13:55:40,507 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 10 [2021-12-15 13:55:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:40,507 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-12-15 13:55:40,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2021-12-15 13:55:40,509 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-12-15 13:55:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 13:55:40,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:40,510 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:40,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 13:55:40,510 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:40,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:40,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-15 13:55:40,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:40,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079461865] [2021-12-15 13:55:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:40,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:40,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:40,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079461865] [2021-12-15 13:55:40,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079461865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:40,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979550437] [2021-12-15 13:55:40,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:40,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:40,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:40,587 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) [2021-12-15 13:55:40,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 13:55:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-15 13:55:40,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:40,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:55:40,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:55:40,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:55:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:40,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:40,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979550437] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:40,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:40,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-15 13:55:40,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146129544] [2021-12-15 13:55:40,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:40,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 13:55:40,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:40,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 13:55:40,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:55:40,984 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2021-12-15 13:55:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:41,123 INFO L93 Difference]: Finished difference Result 146 states and 167 transitions. [2021-12-15 13:55:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 13:55:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) Word has length 11 [2021-12-15 13:55:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:41,124 INFO L225 Difference]: With dead ends: 146 [2021-12-15 13:55:41,124 INFO L226 Difference]: Without dead ends: 146 [2021-12-15 13:55:41,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-15 13:55:41,127 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 236 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:41,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 233 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:41,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-15 13:55:41,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 58. [2021-12-15 13:55:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 57 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-12-15 13:55:41,136 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 11 [2021-12-15 13:55:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:41,136 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-12-15 13:55:41,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2021-12-15 13:55:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-12-15 13:55:41,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 13:55:41,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:41,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:41,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 13:55:41,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:41,351 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:41,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:41,352 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2021-12-15 13:55:41,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:41,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367604728] [2021-12-15 13:55:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:41,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:41,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:41,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367604728] [2021-12-15 13:55:41,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367604728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:41,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:41,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 13:55:41,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927386719] [2021-12-15 13:55:41,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:41,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 13:55:41,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:41,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 13:55:41,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 13:55:41,407 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2021-12-15 13:55:41,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:41,459 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-12-15 13:55:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:55:41,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2021-12-15 13:55:41,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:41,460 INFO L225 Difference]: With dead ends: 81 [2021-12-15 13:55:41,460 INFO L226 Difference]: Without dead ends: 81 [2021-12-15 13:55:41,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 13:55:41,461 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 222 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:41,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 62 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:41,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-15 13:55:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2021-12-15 13:55:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 65 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-12-15 13:55:41,464 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 12 [2021-12-15 13:55:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:41,464 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-12-15 13:55:41,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2021-12-15 13:55:41,465 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-12-15 13:55:41,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 13:55:41,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:41,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:41,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 13:55:41,466 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:41,467 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2021-12-15 13:55:41,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:41,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216650534] [2021-12-15 13:55:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:41,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:41,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:41,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216650534] [2021-12-15 13:55:41,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216650534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:41,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:41,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:41,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191611934] [2021-12-15 13:55:41,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:41,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:41,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:41,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:41,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:41,501 INFO L87 Difference]: Start difference. First operand 66 states and 82 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) [2021-12-15 13:55:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:41,524 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2021-12-15 13:55:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:41,524 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 [2021-12-15 13:55:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:41,525 INFO L225 Difference]: With dead ends: 63 [2021-12-15 13:55:41,525 INFO L226 Difference]: Without dead ends: 63 [2021-12-15 13:55:41,525 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 [2021-12-15 13:55:41,525 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:41,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 48 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-15 13:55:41,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-15 13:55:41,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 62 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) [2021-12-15 13:55:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-12-15 13:55:41,528 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 12 [2021-12-15 13:55:41,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:41,528 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-12-15 13:55:41,528 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) [2021-12-15 13:55:41,528 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-12-15 13:55:41,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 13:55:41,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:41,530 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:41,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 13:55:41,530 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:41,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:41,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-15 13:55:41,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:41,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276869967] [2021-12-15 13:55:41,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:41,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:41,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:41,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276869967] [2021-12-15 13:55:41,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276869967] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:41,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309505734] [2021-12-15 13:55:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:41,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:41,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:41,587 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) [2021-12-15 13:55:41,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 13:55:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:41,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 13:55:41,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:41,666 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:55:41,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:55:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:41,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:41,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309505734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:41,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:41,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-15 13:55:41,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410816678] [2021-12-15 13:55:41,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:41,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 13:55:41,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:41,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 13:55:41,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-15 13:55:41,875 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:42,002 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2021-12-15 13:55:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 13:55:42,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 13 [2021-12-15 13:55:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:42,003 INFO L225 Difference]: With dead ends: 133 [2021-12-15 13:55:42,003 INFO L226 Difference]: Without dead ends: 133 [2021-12-15 13:55:42,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-15 13:55:42,004 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 203 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:42,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 194 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:42,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-15 13:55:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 60. [2021-12-15 13:55:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 59 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) [2021-12-15 13:55:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-12-15 13:55:42,006 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 13 [2021-12-15 13:55:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:42,006 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-12-15 13:55:42,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-12-15 13:55:42,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 13:55:42,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:42,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:42,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:42,206 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,SelfDestructingSolverStorable11 [2021-12-15 13:55:42,207 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:42,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:42,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1432374396, now seen corresponding path program 1 times [2021-12-15 13:55:42,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:42,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146634401] [2021-12-15 13:55:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:42,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:42,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:42,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146634401] [2021-12-15 13:55:42,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146634401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:42,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:42,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:42,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733280987] [2021-12-15 13:55:42,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:42,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:42,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:42,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:42,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:42,239 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2021-12-15 13:55:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:42,258 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-12-15 13:55:42,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:42,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-15 13:55:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:42,259 INFO L225 Difference]: With dead ends: 58 [2021-12-15 13:55:42,259 INFO L226 Difference]: Without dead ends: 58 [2021-12-15 13:55:42,259 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 [2021-12-15 13:55:42,265 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:42,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 47 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:42,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-15 13:55:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-15 13:55:42,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-12-15 13:55:42,268 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 16 [2021-12-15 13:55:42,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:42,268 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-12-15 13:55:42,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2021-12-15 13:55:42,269 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-12-15 13:55:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 13:55:42,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:42,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:42,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 13:55:42,269 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1432374395, now seen corresponding path program 1 times [2021-12-15 13:55:42,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:42,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746764241] [2021-12-15 13:55:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:42,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:42,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:42,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746764241] [2021-12-15 13:55:42,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746764241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:42,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:42,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 13:55:42,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723843522] [2021-12-15 13:55:42,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:42,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 13:55:42,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:42,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 13:55:42,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 13:55:42,328 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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) [2021-12-15 13:55:42,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:42,358 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-12-15 13:55:42,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:55:42,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-15 13:55:42,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:42,359 INFO L225 Difference]: With dead ends: 66 [2021-12-15 13:55:42,360 INFO L226 Difference]: Without dead ends: 66 [2021-12-15 13:55:42,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:55:42,360 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 121 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:42,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 58 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-15 13:55:42,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-12-15 13:55:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:42,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-12-15 13:55:42,364 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 16 [2021-12-15 13:55:42,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:42,364 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-12-15 13:55:42,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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) [2021-12-15 13:55:42,364 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-12-15 13:55:42,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 13:55:42,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:42,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:42,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 13:55:42,365 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:42,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1432365322, now seen corresponding path program 1 times [2021-12-15 13:55:42,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:42,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447687726] [2021-12-15 13:55:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:42,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:42,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:42,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447687726] [2021-12-15 13:55:42,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447687726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:42,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:42,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:42,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868238222] [2021-12-15 13:55:42,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:42,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:55:42,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:42,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:55:42,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:55:42,397 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2021-12-15 13:55:42,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:42,401 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-12-15 13:55:42,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:55:42,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-15 13:55:42,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:42,402 INFO L225 Difference]: With dead ends: 62 [2021-12-15 13:55:42,402 INFO L226 Difference]: Without dead ends: 62 [2021-12-15 13:55:42,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:55:42,403 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:42,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-15 13:55:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-12-15 13:55:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 61 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) [2021-12-15 13:55:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-12-15 13:55:42,404 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 16 [2021-12-15 13:55:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:42,404 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-12-15 13:55:42,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2021-12-15 13:55:42,405 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-12-15 13:55:42,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 13:55:42,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:42,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:42,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 13:55:42,405 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:42,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:42,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1365500555, now seen corresponding path program 1 times [2021-12-15 13:55:42,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:42,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264193538] [2021-12-15 13:55:42,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:42,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:42,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:42,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264193538] [2021-12-15 13:55:42,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264193538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:42,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:42,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 13:55:42,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64658183] [2021-12-15 13:55:42,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:42,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 13:55:42,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:42,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 13:55:42,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 13:55:42,478 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:42,557 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2021-12-15 13:55:42,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 13:55:42,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-12-15 13:55:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:42,557 INFO L225 Difference]: With dead ends: 85 [2021-12-15 13:55:42,557 INFO L226 Difference]: Without dead ends: 85 [2021-12-15 13:55:42,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-15 13:55:42,558 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:42,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 188 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-15 13:55:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2021-12-15 13:55:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 74 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2021-12-15 13:55:42,560 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 19 [2021-12-15 13:55:42,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:42,560 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2021-12-15 13:55:42,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:42,560 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2021-12-15 13:55:42,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 13:55:42,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:42,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:42,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 13:55:42,560 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:42,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1341118839, now seen corresponding path program 1 times [2021-12-15 13:55:42,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:42,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915185312] [2021-12-15 13:55:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:42,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:42,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:42,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915185312] [2021-12-15 13:55:42,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915185312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:42,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:42,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 13:55:42,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786139363] [2021-12-15 13:55:42,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:42,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 13:55:42,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:42,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 13:55:42,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:55:42,691 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:42,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:42,845 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-12-15 13:55:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:55:42,846 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-12-15 13:55:42,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:42,846 INFO L225 Difference]: With dead ends: 106 [2021-12-15 13:55:42,846 INFO L226 Difference]: Without dead ends: 106 [2021-12-15 13:55:42,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-12-15 13:55:42,847 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 109 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:42,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 199 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:42,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-15 13:55:42,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2021-12-15 13:55:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.267605633802817) internal successors, (90), 76 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) [2021-12-15 13:55:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2021-12-15 13:55:42,849 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 19 [2021-12-15 13:55:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:42,849 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2021-12-15 13:55:42,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2021-12-15 13:55:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 13:55:42,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:42,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:42,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 13:55:42,850 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1756023060, now seen corresponding path program 1 times [2021-12-15 13:55:42,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:42,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864892378] [2021-12-15 13:55:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:42,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:42,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:42,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864892378] [2021-12-15 13:55:42,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864892378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:42,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:42,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-15 13:55:42,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368994861] [2021-12-15 13:55:42,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:42,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 13:55:42,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:42,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 13:55:42,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-15 13:55:42,981 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-12-15 13:55:43,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:43,172 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2021-12-15 13:55:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 13:55:43,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) Word has length 23 [2021-12-15 13:55:43,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:43,173 INFO L225 Difference]: With dead ends: 134 [2021-12-15 13:55:43,173 INFO L226 Difference]: Without dead ends: 134 [2021-12-15 13:55:43,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-12-15 13:55:43,174 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 161 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:43,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 253 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:43,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-15 13:55:43,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 95. [2021-12-15 13:55:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 94 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2021-12-15 13:55:43,176 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 23 [2021-12-15 13:55:43,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:43,176 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2021-12-15 13:55:43,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-12-15 13:55:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2021-12-15 13:55:43,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 13:55:43,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:43,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:43,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 13:55:43,177 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:43,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1756082642, now seen corresponding path program 1 times [2021-12-15 13:55:43,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:43,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787451496] [2021-12-15 13:55:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:43,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:43,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:43,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787451496] [2021-12-15 13:55:43,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787451496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:43,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:43,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:43,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504007333] [2021-12-15 13:55:43,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:43,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:43,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:43,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:43,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:43,227 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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) [2021-12-15 13:55:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:43,240 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-12-15 13:55:43,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:43,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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) Word has length 23 [2021-12-15 13:55:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:43,241 INFO L225 Difference]: With dead ends: 94 [2021-12-15 13:55:43,241 INFO L226 Difference]: Without dead ends: 55 [2021-12-15 13:55:43,242 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 [2021-12-15 13:55:43,242 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:43,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-15 13:55:43,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2021-12-15 13:55:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-12-15 13:55:43,244 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 23 [2021-12-15 13:55:43,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:43,244 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-12-15 13:55:43,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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) [2021-12-15 13:55:43,245 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-12-15 13:55:43,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 13:55:43,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:43,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:43,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 13:55:43,245 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:43,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1222026810, now seen corresponding path program 1 times [2021-12-15 13:55:43,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:43,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531600312] [2021-12-15 13:55:43,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:43,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:43,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:43,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531600312] [2021-12-15 13:55:43,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531600312] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:43,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126155927] [2021-12-15 13:55:43,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:43,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:43,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:43,309 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) [2021-12-15 13:55:43,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 13:55:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:43,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-15 13:55:43,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:43,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:55:43,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:55:43,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:55:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:43,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:43,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126155927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:43,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:43,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2021-12-15 13:55:43,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779537049] [2021-12-15 13:55:43,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:43,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 13:55:43,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:43,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 13:55:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-15 13:55:43,653 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 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) [2021-12-15 13:55:43,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:43,839 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-12-15 13:55:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 13:55:43,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 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) Word has length 23 [2021-12-15 13:55:43,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:43,840 INFO L225 Difference]: With dead ends: 66 [2021-12-15 13:55:43,840 INFO L226 Difference]: Without dead ends: 66 [2021-12-15 13:55:43,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-12-15 13:55:43,841 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:43,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 143 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-15 13:55:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-12-15 13:55:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-12-15 13:55:43,843 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 23 [2021-12-15 13:55:43,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:43,843 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-12-15 13:55:43,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 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) [2021-12-15 13:55:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-12-15 13:55:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 13:55:43,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:43,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:43,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:44,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:44,060 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:44,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:44,061 INFO L85 PathProgramCache]: Analyzing trace with hash 340221504, now seen corresponding path program 1 times [2021-12-15 13:55:44,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:44,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66991228] [2021-12-15 13:55:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:44,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:44,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:44,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66991228] [2021-12-15 13:55:44,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66991228] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:44,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119026676] [2021-12-15 13:55:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:44,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:44,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:44,336 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) [2021-12-15 13:55:44,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 13:55:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:44,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-15 13:55:44,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:44,460 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 [2021-12-15 13:55:44,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:55:44,719 INFO L354 Elim1Store]: treesize reduction 15, result has 50.0 percent of original size [2021-12-15 13:55:44,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-12-15 13:55:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:55:44,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:55:44,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119026676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:44,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 13:55:44,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 21 [2021-12-15 13:55:44,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10548403] [2021-12-15 13:55:44,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:44,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 13:55:44,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:44,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 13:55:44,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-12-15 13:55:44,751 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:44,783 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-12-15 13:55:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 13:55:44,784 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-12-15 13:55:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:44,785 INFO L225 Difference]: With dead ends: 58 [2021-12-15 13:55:44,785 INFO L226 Difference]: Without dead ends: 40 [2021-12-15 13:55:44,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-12-15 13:55:44,786 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:44,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 134 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2021-12-15 13:55:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-15 13:55:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-15 13:55:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-12-15 13:55:44,787 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 27 [2021-12-15 13:55:44,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:44,788 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-12-15 13:55:44,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-12-15 13:55:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 13:55:44,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:44,788 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:44,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:45,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:45,008 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:45,008 INFO L85 PathProgramCache]: Analyzing trace with hash 206207998, now seen corresponding path program 1 times [2021-12-15 13:55:45,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:45,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383111060] [2021-12-15 13:55:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:45,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:55:45,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:45,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383111060] [2021-12-15 13:55:45,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383111060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:45,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:45,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-15 13:55:45,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148576997] [2021-12-15 13:55:45,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:45,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 13:55:45,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:45,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 13:55:45,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-15 13:55:45,152 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:45,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:45,358 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-12-15 13:55:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 13:55:45,360 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-12-15 13:55:45,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:45,360 INFO L225 Difference]: With dead ends: 54 [2021-12-15 13:55:45,360 INFO L226 Difference]: Without dead ends: 44 [2021-12-15 13:55:45,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-12-15 13:55:45,361 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 93 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:45,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 185 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-15 13:55:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-12-15 13:55:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-12-15 13:55:45,362 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 27 [2021-12-15 13:55:45,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:45,363 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-12-15 13:55:45,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-12-15 13:55:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 13:55:45,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:45,363 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:45,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 13:55:45,364 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:45,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:45,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2033318401, now seen corresponding path program 1 times [2021-12-15 13:55:45,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:45,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593097364] [2021-12-15 13:55:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:45,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:55:45,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:45,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593097364] [2021-12-15 13:55:45,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593097364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:45,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468866968] [2021-12-15 13:55:45,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:45,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:45,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:45,435 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) [2021-12-15 13:55:45,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 13:55:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:45,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 13:55:45,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:55:45,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:45,664 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 [2021-12-15 13:55:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:55:45,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468866968] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:45,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:45,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2021-12-15 13:55:45,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204410731] [2021-12-15 13:55:45,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:45,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 13:55:45,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:45,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 13:55:45,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-15 13:55:45,688 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 18 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:45,806 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-12-15 13:55:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 13:55:45,806 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-15 13:55:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:45,807 INFO L225 Difference]: With dead ends: 57 [2021-12-15 13:55:45,807 INFO L226 Difference]: Without dead ends: 50 [2021-12-15 13:55:45,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-12-15 13:55:45,808 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 136 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:45,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 163 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-15 13:55:45,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-12-15 13:55:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-12-15 13:55:45,809 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 31 [2021-12-15 13:55:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:45,809 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-12-15 13:55:45,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-12-15 13:55:45,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 13:55:45,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:45,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:45,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:46,026 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,SelfDestructingSolverStorable22 [2021-12-15 13:55:46,026 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:46,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1630243463, now seen corresponding path program 1 times [2021-12-15 13:55:46,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:46,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646146223] [2021-12-15 13:55:46,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:46,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:55:46,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:46,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646146223] [2021-12-15 13:55:46,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646146223] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:46,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647239195] [2021-12-15 13:55:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:46,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:46,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:46,153 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) [2021-12-15 13:55:46,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 13:55:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:46,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-15 13:55:46,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:46,273 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 [2021-12-15 13:55:46,552 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-12-15 13:55:46,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2021-12-15 13:55:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:55:46,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:46,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:55:46,847 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 91 treesize of output 91 [2021-12-15 13:55:46,894 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 36 treesize of output 32 [2021-12-15 13:55:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:55:46,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647239195] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:46,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:46,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 33 [2021-12-15 13:55:46,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996684719] [2021-12-15 13:55:46,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:47,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 13:55:47,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:47,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 13:55:47,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 13:55:47,003 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:47,455 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2021-12-15 13:55:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-15 13:55:47,456 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 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 [2021-12-15 13:55:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:47,456 INFO L225 Difference]: With dead ends: 115 [2021-12-15 13:55:47,456 INFO L226 Difference]: Without dead ends: 59 [2021-12-15 13:55:47,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 13:55:47,458 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 87 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:47,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 243 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 236 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2021-12-15 13:55:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-15 13:55:47,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-12-15 13:55:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-12-15 13:55:47,459 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 34 [2021-12-15 13:55:47,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:47,459 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-12-15 13:55:47,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:47,459 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-12-15 13:55:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 13:55:47,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:47,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:47,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:47,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:47,660 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:47,661 INFO L85 PathProgramCache]: Analyzing trace with hash 143338355, now seen corresponding path program 2 times [2021-12-15 13:55:47,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:47,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606960142] [2021-12-15 13:55:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:47,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 13:55:47,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:47,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606960142] [2021-12-15 13:55:47,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606960142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:47,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702573411] [2021-12-15 13:55:47,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:55:47,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:47,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:47,756 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) [2021-12-15 13:55:47,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 13:55:47,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:55:47,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:47,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-15 13:55:47,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 13:55:47,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:48,068 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 [2021-12-15 13:55:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 13:55:48,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702573411] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:48,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:48,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-15 13:55:48,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155925492] [2021-12-15 13:55:48,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:48,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-15 13:55:48,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:48,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-15 13:55:48,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-15 13:55:48,110 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:48,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:48,278 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-12-15 13:55:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:55:48,279 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 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 42 [2021-12-15 13:55:48,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:48,279 INFO L225 Difference]: With dead ends: 68 [2021-12-15 13:55:48,279 INFO L226 Difference]: Without dead ends: 68 [2021-12-15 13:55:48,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-12-15 13:55:48,280 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 304 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:48,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 171 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:48,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-15 13:55:48,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2021-12-15 13:55:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:48,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-12-15 13:55:48,281 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 42 [2021-12-15 13:55:48,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:48,281 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-12-15 13:55:48,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:48,281 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-12-15 13:55:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-15 13:55:48,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:48,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:48,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:48,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:48,482 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:48,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:48,482 INFO L85 PathProgramCache]: Analyzing trace with hash 794074873, now seen corresponding path program 2 times [2021-12-15 13:55:48,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:48,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005894410] [2021-12-15 13:55:48,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:48,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 13:55:48,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:48,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005894410] [2021-12-15 13:55:48,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005894410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:48,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951156800] [2021-12-15 13:55:48,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:55:48,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:48,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:48,594 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) [2021-12-15 13:55:48,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 13:55:48,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:55:48,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:48,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 13:55:48,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:48,673 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:55:48,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:55:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 13:55:48,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 13:55:49,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951156800] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:49,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:49,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2021-12-15 13:55:49,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138929202] [2021-12-15 13:55:49,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:49,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-15 13:55:49,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:49,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-15 13:55:49,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-12-15 13:55:49,175 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 24 states, 23 states have (on average 5.086956521739131) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:49,372 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-12-15 13:55:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:55:49,373 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.086956521739131) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 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 [2021-12-15 13:55:49,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:49,373 INFO L225 Difference]: With dead ends: 66 [2021-12-15 13:55:49,373 INFO L226 Difference]: Without dead ends: 62 [2021-12-15 13:55:49,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-12-15 13:55:49,374 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 264 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:49,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 172 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-15 13:55:49,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-12-15 13:55:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-12-15 13:55:49,375 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2021-12-15 13:55:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:49,375 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-12-15 13:55:49,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.086956521739131) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-12-15 13:55:49,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 13:55:49,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:49,376 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:49,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:49,576 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,SelfDestructingSolverStorable25 [2021-12-15 13:55:49,576 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:49,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:49,577 INFO L85 PathProgramCache]: Analyzing trace with hash -395309695, now seen corresponding path program 3 times [2021-12-15 13:55:49,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:49,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823218104] [2021-12-15 13:55:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:49,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 13:55:49,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:49,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823218104] [2021-12-15 13:55:49,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823218104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:49,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472366701] [2021-12-15 13:55:49,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:55:49,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:49,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:49,730 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) [2021-12-15 13:55:49,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 13:55:49,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 13:55:49,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:49,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-15 13:55:49,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:50,015 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 [2021-12-15 13:55:50,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:55:50,452 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-15 13:55:50,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 21 [2021-12-15 13:55:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 13:55:50,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:50,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:55:50,801 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 103 treesize of output 103 [2021-12-15 13:55:50,819 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 40 treesize of output 36 [2021-12-15 13:55:50,854 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 7 treesize of output 3 [2021-12-15 13:55:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 13:55:51,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472366701] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:51,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:51,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 17] total 42 [2021-12-15 13:55:51,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600766476] [2021-12-15 13:55:51,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:51,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-15 13:55:51,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:51,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-15 13:55:51,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 13:55:51,034 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 42 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) [2021-12-15 13:55:51,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:51,888 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2021-12-15 13:55:51,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-15 13:55:51,888 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 42 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 49 [2021-12-15 13:55:51,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:51,889 INFO L225 Difference]: With dead ends: 155 [2021-12-15 13:55:51,889 INFO L226 Difference]: Without dead ends: 74 [2021-12-15 13:55:51,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=368, Invalid=4188, Unknown=0, NotChecked=0, Total=4556 [2021-12-15 13:55:51,890 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:51,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 519 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 455 Invalid, 0 Unknown, 300 Unchecked, 0.2s Time] [2021-12-15 13:55:51,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-15 13:55:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-12-15 13:55:51,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-12-15 13:55:51,892 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 49 [2021-12-15 13:55:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:51,892 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-12-15 13:55:51,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 42 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) [2021-12-15 13:55:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-12-15 13:55:51,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 13:55:51,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:51,892 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:51,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:52,099 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,SelfDestructingSolverStorable26 [2021-12-15 13:55:52,099 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:52,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:52,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2098265017, now seen corresponding path program 4 times [2021-12-15 13:55:52,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:52,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708882074] [2021-12-15 13:55:52,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:52,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 13:55:52,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:52,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708882074] [2021-12-15 13:55:52,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708882074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:52,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217613443] [2021-12-15 13:55:52,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:55:52,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:52,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:52,198 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) [2021-12-15 13:55:52,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 13:55:52,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:55:52,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:52,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-15 13:55:52,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:52,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:55:52,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:55:52,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 13:55:52,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 13:55:52,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:55:52,636 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 [2021-12-15 13:55:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 13:55:52,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:53,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:55:53,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-15 13:55:53,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:55:53,358 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 33 treesize of output 33 [2021-12-15 13:55:53,361 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 9 treesize of output 7 [2021-12-15 13:55:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 13:55:53,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217613443] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:53,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:53,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2021-12-15 13:55:53,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214640509] [2021-12-15 13:55:53,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:53,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 13:55:53,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:53,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 13:55:53,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=814, Unknown=6, NotChecked=0, Total=930 [2021-12-15 13:55:53,823 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 31 states, 30 states have (on average 3.933333333333333) internal successors, (118), 31 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:54,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:54,332 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-12-15 13:55:54,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 13:55:54,332 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.933333333333333) internal successors, (118), 31 states have internal predecessors, (118), 0 states have call successors, (0), 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 57 [2021-12-15 13:55:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:54,332 INFO L225 Difference]: With dead ends: 69 [2021-12-15 13:55:54,332 INFO L226 Difference]: Without dead ends: 69 [2021-12-15 13:55:54,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=349, Invalid=1536, Unknown=7, NotChecked=0, Total=1892 [2021-12-15 13:55:54,333 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 288 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:54,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 242 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 289 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2021-12-15 13:55:54,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-15 13:55:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2021-12-15 13:55:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2021-12-15 13:55:54,335 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 57 [2021-12-15 13:55:54,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:54,335 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2021-12-15 13:55:54,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.933333333333333) internal successors, (118), 31 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:54,335 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2021-12-15 13:55:54,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 13:55:54,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:54,335 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:54,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:54,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-15 13:55:54,536 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:54,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1346900531, now seen corresponding path program 3 times [2021-12-15 13:55:54,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:54,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068043062] [2021-12-15 13:55:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:54,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 13:55:54,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:54,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068043062] [2021-12-15 13:55:54,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068043062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:54,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898680576] [2021-12-15 13:55:54,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:55:54,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:54,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:54,665 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) [2021-12-15 13:55:54,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 13:55:54,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 13:55:54,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:54,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-15 13:55:54,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:54,764 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:55:54,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:55:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 13:55:55,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 13:55:55,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898680576] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:55,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:55,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2021-12-15 13:55:55,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379449503] [2021-12-15 13:55:55,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:55,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-15 13:55:55,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-15 13:55:55,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-12-15 13:55:55,494 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 32 states, 31 states have (on average 4.870967741935484) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:55,732 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2021-12-15 13:55:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 13:55:55,732 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.870967741935484) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 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 61 [2021-12-15 13:55:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:55,733 INFO L225 Difference]: With dead ends: 80 [2021-12-15 13:55:55,733 INFO L226 Difference]: Without dead ends: 76 [2021-12-15 13:55:55,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 13:55:55,733 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 246 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:55,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 267 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-15 13:55:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-12-15 13:55:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 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) [2021-12-15 13:55:55,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-12-15 13:55:55,735 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 61 [2021-12-15 13:55:55,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:55,735 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-12-15 13:55:55,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.870967741935484) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-12-15 13:55:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 13:55:55,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:55,735 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:55,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:55,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-15 13:55:55,936 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:55,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:55,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1797252275, now seen corresponding path program 4 times [2021-12-15 13:55:55,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:55,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252003476] [2021-12-15 13:55:55,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:55,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 13:55:56,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:56,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252003476] [2021-12-15 13:55:56,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252003476] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:56,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338713883] [2021-12-15 13:55:56,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:55:56,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:56,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:56,092 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) [2021-12-15 13:55:56,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 13:55:56,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:55:56,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:56,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-15 13:55:56,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:56,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:55:56,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:55:56,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:55:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 13:55:56,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 58 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 13:55:56,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338713883] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:56,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:56,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2021-12-15 13:55:56,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602126619] [2021-12-15 13:55:56,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:56,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 13:55:56,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:56,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 13:55:56,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-12-15 13:55:56,783 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 29 states, 29 states have (on average 4.586206896551724) internal successors, (133), 29 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:56,984 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2021-12-15 13:55:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 13:55:56,985 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.586206896551724) internal successors, (133), 29 states have internal predecessors, (133), 0 states have call successors, (0), 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 68 [2021-12-15 13:55:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:56,986 INFO L225 Difference]: With dead ends: 127 [2021-12-15 13:55:56,986 INFO L226 Difference]: Without dead ends: 81 [2021-12-15 13:55:56,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 13:55:56,987 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 103 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:56,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 254 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-15 13:55:56,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-12-15 13:55:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 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) [2021-12-15 13:55:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-12-15 13:55:56,990 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2021-12-15 13:55:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:56,991 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-12-15 13:55:56,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.586206896551724) internal successors, (133), 29 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-12-15 13:55:56,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 13:55:56,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:56,991 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:57,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:57,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:57,196 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:55:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:57,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1052266832, now seen corresponding path program 5 times [2021-12-15 13:55:57,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:57,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393232485] [2021-12-15 13:55:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:57,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:57,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:57,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393232485] [2021-12-15 13:55:57,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393232485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:57,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274122706] [2021-12-15 13:55:57,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:55:57,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:57,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:57,653 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) [2021-12-15 13:55:57,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 13:55:57,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-15 13:55:57,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:57,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-15 13:55:57,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:57,942 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 [2021-12-15 13:55:58,489 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-12-15 13:55:58,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2021-12-15 13:55:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 20 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 13:55:58,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:58,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:55:58,982 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 91 treesize of output 91 [2021-12-15 13:55:59,014 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 36 treesize of output 32 [2021-12-15 13:55:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 20 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 13:55:59,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274122706] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:59,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:59,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 51 [2021-12-15 13:55:59,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128096264] [2021-12-15 13:55:59,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:59,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-15 13:55:59,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:59,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-15 13:55:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2405, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 13:55:59,193 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 51 states, 51 states have (on average 3.1372549019607843) internal successors, (160), 51 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) [2021-12-15 13:56:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:00,771 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2021-12-15 13:56:00,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-15 13:56:00,771 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.1372549019607843) internal successors, (160), 51 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) Word has length 72 [2021-12-15 13:56:00,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:00,772 INFO L225 Difference]: With dead ends: 178 [2021-12-15 13:56:00,772 INFO L226 Difference]: Without dead ends: 116 [2021-12-15 13:56:00,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=444, Invalid=6528, Unknown=0, NotChecked=0, Total=6972 [2021-12-15 13:56:00,774 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 149 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:00,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 794 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 893 Invalid, 0 Unknown, 337 Unchecked, 0.3s Time] [2021-12-15 13:56:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-15 13:56:00,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 82. [2021-12-15 13:56:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 80 states have (on average 1.05) internal successors, (84), 81 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) [2021-12-15 13:56:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-12-15 13:56:00,777 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 72 [2021-12-15 13:56:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:00,777 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-12-15 13:56:00,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.1372549019607843) internal successors, (160), 51 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) [2021-12-15 13:56:00,777 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-12-15 13:56:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 13:56:00,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:00,778 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:00,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:00,997 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,SelfDestructingSolverStorable30 [2021-12-15 13:56:00,998 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:56:00,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:00,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1296737235, now seen corresponding path program 6 times [2021-12-15 13:56:00,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:00,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798791603] [2021-12-15 13:56:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:00,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 13:56:01,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:01,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798791603] [2021-12-15 13:56:01,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798791603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:01,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804349798] [2021-12-15 13:56:01,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:56:01,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:01,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:01,144 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) [2021-12-15 13:56:01,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 13:56:01,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-15 13:56:01,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:01,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-15 13:56:01,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:01,280 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:56:01,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:56:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 13:56:01,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 13:56:02,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804349798] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:02,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:02,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2021-12-15 13:56:02,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607066504] [2021-12-15 13:56:02,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:02,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-15 13:56:02,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:02,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-15 13:56:02,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 13:56:02,169 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 38 states, 37 states have (on average 4.972972972972973) internal successors, (184), 38 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) [2021-12-15 13:56:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:02,398 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2021-12-15 13:56:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 13:56:02,399 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.972972972972973) internal successors, (184), 38 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) Word has length 76 [2021-12-15 13:56:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:02,399 INFO L225 Difference]: With dead ends: 95 [2021-12-15 13:56:02,399 INFO L226 Difference]: Without dead ends: 91 [2021-12-15 13:56:02,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=415, Invalid=1565, Unknown=0, NotChecked=0, Total=1980 [2021-12-15 13:56:02,401 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 250 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:02,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 241 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:56:02,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-15 13:56:02,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-12-15 13:56:02,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2021-12-15 13:56:02,411 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 76 [2021-12-15 13:56:02,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:02,411 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2021-12-15 13:56:02,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.972972972972973) internal successors, (184), 38 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) [2021-12-15 13:56:02,411 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2021-12-15 13:56:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 13:56:02,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:02,412 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:02,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:02,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:02,627 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:56:02,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:02,628 INFO L85 PathProgramCache]: Analyzing trace with hash 926648915, now seen corresponding path program 7 times [2021-12-15 13:56:02,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:02,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731187553] [2021-12-15 13:56:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:02,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 66 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 13:56:02,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:02,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731187553] [2021-12-15 13:56:02,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731187553] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:02,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114712389] [2021-12-15 13:56:02,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 13:56:02,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:02,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:02,779 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) [2021-12-15 13:56:02,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-15 13:56:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:02,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-15 13:56:02,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:02,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:56:02,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:56:02,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:56:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 95 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 13:56:03,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 90 proven. 33 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 13:56:03,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114712389] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:03,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:03,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2021-12-15 13:56:03,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301259352] [2021-12-15 13:56:03,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:03,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-15 13:56:03,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:03,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-15 13:56:03,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 13:56:03,456 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:03,675 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2021-12-15 13:56:03,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 13:56:03,676 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 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 83 [2021-12-15 13:56:03,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:03,676 INFO L225 Difference]: With dead ends: 153 [2021-12-15 13:56:03,676 INFO L226 Difference]: Without dead ends: 96 [2021-12-15 13:56:03,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=367, Invalid=1273, Unknown=0, NotChecked=0, Total=1640 [2021-12-15 13:56:03,677 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 154 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:03,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 277 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:56:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-15 13:56:03,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-12-15 13:56:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 91 states have (on average 1.043956043956044) internal successors, (95), 92 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2021-12-15 13:56:03,678 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 83 [2021-12-15 13:56:03,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:03,679 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2021-12-15 13:56:03,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2021-12-15 13:56:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-15 13:56:03,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:03,679 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:03,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:03,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:03,880 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:56:03,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:03,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1598902250, now seen corresponding path program 8 times [2021-12-15 13:56:03,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:03,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368530608] [2021-12-15 13:56:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:03,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:04,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:04,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368530608] [2021-12-15 13:56:04,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368530608] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:04,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113484349] [2021-12-15 13:56:04,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:56:04,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:04,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:04,651 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) [2021-12-15 13:56:04,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-15 13:56:04,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:56:04,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:04,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-15 13:56:04,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:04,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:56:04,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:56:05,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 13:56:05,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 13:56:05,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:56:05,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-15 13:56:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 85 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 13:56:05,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:06,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:56:06,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-15 13:56:06,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:56:06,679 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 33 treesize of output 33 [2021-12-15 13:56:06,682 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 9 treesize of output 7 [2021-12-15 13:56:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 76 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 13:56:07,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113484349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:07,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:07,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 20] total 59 [2021-12-15 13:56:07,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733376312] [2021-12-15 13:56:07,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:07,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-15 13:56:07,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:07,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-15 13:56:07,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=3166, Unknown=0, NotChecked=0, Total=3422 [2021-12-15 13:56:07,629 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 59 states, 59 states have (on average 3.7457627118644066) internal successors, (221), 59 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) [2021-12-15 13:56:09,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:09,273 INFO L93 Difference]: Finished difference Result 205 states and 210 transitions. [2021-12-15 13:56:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-15 13:56:09,273 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.7457627118644066) internal successors, (221), 59 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 87 [2021-12-15 13:56:09,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:09,274 INFO L225 Difference]: With dead ends: 205 [2021-12-15 13:56:09,274 INFO L226 Difference]: Without dead ends: 205 [2021-12-15 13:56:09,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=650, Invalid=6660, Unknown=0, NotChecked=0, Total=7310 [2021-12-15 13:56:09,276 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 170 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:09,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1032 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 912 Invalid, 0 Unknown, 105 Unchecked, 0.4s Time] [2021-12-15 13:56:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-15 13:56:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 156. [2021-12-15 13:56:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 154 states have (on average 1.0389610389610389) internal successors, (160), 155 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) [2021-12-15 13:56:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2021-12-15 13:56:09,278 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 87 [2021-12-15 13:56:09,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:09,278 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2021-12-15 13:56:09,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.7457627118644066) internal successors, (221), 59 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) [2021-12-15 13:56:09,278 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2021-12-15 13:56:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-15 13:56:09,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:09,278 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:09,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:09,479 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,SelfDestructingSolverStorable33 [2021-12-15 13:56:09,479 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:56:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:09,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1061914275, now seen corresponding path program 1 times [2021-12-15 13:56:09,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:09,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106346888] [2021-12-15 13:56:09,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:09,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 20 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:10,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:10,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106346888] [2021-12-15 13:56:10,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106346888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:10,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051936774] [2021-12-15 13:56:10,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:10,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:10,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:10,028 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) [2021-12-15 13:56:10,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-15 13:56:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:10,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-15 13:56:10,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:10,259 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 [2021-12-15 13:56:11,260 INFO L354 Elim1Store]: treesize reduction 1, result has 97.4 percent of original size [2021-12-15 13:56:11,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2021-12-15 13:56:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 15 proven. 103 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 13:56:11,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:12,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:56:12,308 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 91 treesize of output 91 [2021-12-15 13:56:12,313 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 [2021-12-15 13:56:12,323 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 36 treesize of output 32 [2021-12-15 13:56:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 15 proven. 103 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 13:56:12,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051936774] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:12,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:12,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 20] total 60 [2021-12-15 13:56:12,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274284090] [2021-12-15 13:56:12,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:12,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-15 13:56:12,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:12,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-15 13:56:12,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=3299, Unknown=0, NotChecked=0, Total=3540 [2021-12-15 13:56:12,425 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 60 states, 60 states have (on average 3.3666666666666667) internal successors, (202), 60 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:18,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:18,910 INFO L93 Difference]: Finished difference Result 253 states and 257 transitions. [2021-12-15 13:56:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-15 13:56:18,910 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.3666666666666667) internal successors, (202), 60 states have internal predecessors, (202), 0 states have call successors, (0), 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 89 [2021-12-15 13:56:18,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:18,911 INFO L225 Difference]: With dead ends: 253 [2021-12-15 13:56:18,911 INFO L226 Difference]: Without dead ends: 110 [2021-12-15 13:56:18,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 161 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=560, Invalid=6922, Unknown=0, NotChecked=0, Total=7482 [2021-12-15 13:56:18,913 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 209 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 546 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:18,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 903 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 800 Invalid, 0 Unknown, 546 Unchecked, 0.3s Time] [2021-12-15 13:56:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-15 13:56:18,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-12-15 13:56:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 107 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2021-12-15 13:56:18,915 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 89 [2021-12-15 13:56:18,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:18,915 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2021-12-15 13:56:18,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.3666666666666667) internal successors, (202), 60 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2021-12-15 13:56:18,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-15 13:56:18,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:18,916 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:18,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-15 13:56:19,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:19,117 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:56:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash -196206268, now seen corresponding path program 9 times [2021-12-15 13:56:19,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:19,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965194037] [2021-12-15 13:56:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:19,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 12 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:19,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965194037] [2021-12-15 13:56:19,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965194037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:19,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802025921] [2021-12-15 13:56:19,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:56:19,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:19,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:19,967 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) [2021-12-15 13:56:19,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-15 13:56:20,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-15 13:56:20,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:20,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-15 13:56:20,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:20,481 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 [2021-12-15 13:56:21,267 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-15 13:56:21,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-12-15 13:56:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 150 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-15 13:56:21,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:22,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:56:22,014 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 91 treesize of output 91 [2021-12-15 13:56:22,054 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 36 treesize of output 32 [2021-12-15 13:56:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 150 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-15 13:56:22,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802025921] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:22,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:22,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 23] total 63 [2021-12-15 13:56:22,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430600004] [2021-12-15 13:56:22,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:22,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-15 13:56:22,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:22,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-15 13:56:22,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3731, Unknown=0, NotChecked=0, Total=3906 [2021-12-15 13:56:22,278 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 63 states, 63 states have (on average 3.5873015873015874) internal successors, (226), 63 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:24,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:24,899 INFO L93 Difference]: Finished difference Result 244 states and 248 transitions. [2021-12-15 13:56:24,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-15 13:56:24,900 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.5873015873015874) internal successors, (226), 63 states have internal predecessors, (226), 0 states have call successors, (0), 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 [2021-12-15 13:56:24,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:24,902 INFO L225 Difference]: With dead ends: 244 [2021-12-15 13:56:24,903 INFO L226 Difference]: Without dead ends: 154 [2021-12-15 13:56:24,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 169 SyntacticMatches, 8 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=571, Invalid=10771, Unknown=0, NotChecked=0, Total=11342 [2021-12-15 13:56:24,904 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 161 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 2304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:24,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 1547 Invalid, 2304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1601 Invalid, 0 Unknown, 635 Unchecked, 0.6s Time] [2021-12-15 13:56:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-15 13:56:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 112. [2021-12-15 13:56:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 111 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) [2021-12-15 13:56:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2021-12-15 13:56:24,906 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 102 [2021-12-15 13:56:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:24,906 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2021-12-15 13:56:24,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.5873015873015874) internal successors, (226), 63 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:24,907 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2021-12-15 13:56:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 13:56:24,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:24,907 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:24,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-15 13:56:25,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:25,115 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:56:25,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:25,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1419555999, now seen corresponding path program 10 times [2021-12-15 13:56:25,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:25,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101860004] [2021-12-15 13:56:25,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:25,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 28 proven. 173 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-15 13:56:25,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:25,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101860004] [2021-12-15 13:56:25,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101860004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:25,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177042844] [2021-12-15 13:56:25,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:56:25,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:25,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:25,328 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) [2021-12-15 13:56:25,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-15 13:56:25,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:56:25,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:25,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-15 13:56:25,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:25,470 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:56:25,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:56:25,732 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 [2021-12-15 13:56:26,281 INFO L354 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2021-12-15 13:56:26,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2021-12-15 13:56:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 50 proven. 151 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-15 13:56:26,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:27,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:56:27,333 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 91 treesize of output 91 [2021-12-15 13:56:27,341 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 36 treesize of output 32 [2021-12-15 13:56:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 66 proven. 135 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-15 13:56:28,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177042844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:28,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:28,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 24] total 57 [2021-12-15 13:56:28,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957486264] [2021-12-15 13:56:28,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:28,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-15 13:56:28,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:28,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-15 13:56:28,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=2933, Unknown=0, NotChecked=0, Total=3306 [2021-12-15 13:56:28,632 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 58 states, 57 states have (on average 4.0) internal successors, (228), 58 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:30,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:30,160 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2021-12-15 13:56:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-15 13:56:30,161 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 4.0) internal successors, (228), 58 states have internal predecessors, (228), 0 states have call successors, (0), 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 [2021-12-15 13:56:30,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:30,161 INFO L225 Difference]: With dead ends: 134 [2021-12-15 13:56:30,161 INFO L226 Difference]: Without dead ends: 126 [2021-12-15 13:56:30,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 173 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=986, Invalid=5494, Unknown=0, NotChecked=0, Total=6480 [2021-12-15 13:56:30,162 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 514 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:30,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 597 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 948 Invalid, 0 Unknown, 346 Unchecked, 0.4s Time] [2021-12-15 13:56:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-15 13:56:30,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-12-15 13:56:30,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 124 states have (on average 1.032258064516129) internal successors, (128), 125 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) [2021-12-15 13:56:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2021-12-15 13:56:30,164 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 106 [2021-12-15 13:56:30,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:30,164 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2021-12-15 13:56:30,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 4.0) internal successors, (228), 58 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:30,164 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2021-12-15 13:56:30,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-15 13:56:30,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:30,165 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:30,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-15 13:56:30,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:30,365 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:56:30,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:30,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1881377185, now seen corresponding path program 11 times [2021-12-15 13:56:30,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:30,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715357119] [2021-12-15 13:56:30,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:30,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 189 proven. 113 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-15 13:56:30,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:30,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715357119] [2021-12-15 13:56:30,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715357119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:30,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693431681] [2021-12-15 13:56:30,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:56:30,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:30,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:30,566 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) [2021-12-15 13:56:30,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-15 13:56:30,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-15 13:56:30,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:30,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-15 13:56:30,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:30,804 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:56:30,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:56:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 236 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-15 13:56:31,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 236 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-15 13:56:31,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693431681] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:31,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:31,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 47 [2021-12-15 13:56:31,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377689914] [2021-12-15 13:56:31,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:31,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-15 13:56:31,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:31,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-15 13:56:31,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=1752, Unknown=0, NotChecked=0, Total=2162 [2021-12-15 13:56:31,611 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 47 states, 47 states have (on average 4.914893617021277) internal successors, (231), 47 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:31,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:31,845 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2021-12-15 13:56:31,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 13:56:31,846 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.914893617021277) internal successors, (231), 47 states have internal predecessors, (231), 0 states have call successors, (0), 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 120 [2021-12-15 13:56:31,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:31,846 INFO L225 Difference]: With dead ends: 190 [2021-12-15 13:56:31,847 INFO L226 Difference]: Without dead ends: 133 [2021-12-15 13:56:31,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-12-15 13:56:31,849 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 174 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:31,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 352 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:56:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-15 13:56:31,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2021-12-15 13:56:31,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 128 states have (on average 1.03125) internal successors, (132), 129 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) [2021-12-15 13:56:31,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2021-12-15 13:56:31,861 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 120 [2021-12-15 13:56:31,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:31,862 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2021-12-15 13:56:31,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.914893617021277) internal successors, (231), 47 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:31,862 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2021-12-15 13:56:31,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-15 13:56:31,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:31,863 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:31,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:32,080 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,SelfDestructingSolverStorable37 [2021-12-15 13:56:32,080 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 13:56:32,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:32,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1404090754, now seen corresponding path program 12 times [2021-12-15 13:56:32,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:32,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128844882] [2021-12-15 13:56:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:32,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 186 proven. 116 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-15 13:56:32,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:32,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128844882] [2021-12-15 13:56:32,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128844882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:32,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064521522] [2021-12-15 13:56:32,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:56:32,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:32,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:32,287 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) [2021-12-15 13:56:32,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-15 13:56:32,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-15 13:56:32,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:32,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-15 13:56:32,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:32,570 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:56:32,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:56:33,003 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 [2021-12-15 13:56:49,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:56:49,248 INFO L354 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2021-12-15 13:56:49,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 27 [2021-12-15 13:56:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 222 proven. 105 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-15 13:56:49,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:50,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:56:50,727 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 87 treesize of output 87 [2021-12-15 13:56:50,742 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 30 treesize of output 28 [2021-12-15 13:56:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 187 proven. 140 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-15 13:56:51,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064521522] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:51,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:51,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 27] total 69 [2021-12-15 13:56:51,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957138097] [2021-12-15 13:56:51,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:51,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-15 13:56:51,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:51,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-15 13:56:51,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4217, Unknown=1, NotChecked=0, Total=4692 [2021-12-15 13:56:51,676 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 69 states, 69 states have (on average 4.202898550724638) internal successors, (290), 69 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)