./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrchr-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/cstrchr-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 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 13:55:38,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 13:55:38,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 13:55:38,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 13:55:38,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 13:55:38,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 13:55:38,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 13:55:38,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 13:55:38,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 13:55:38,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 13:55:38,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 13:55:38,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 13:55:38,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 13:55:38,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 13:55:38,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 13:55:38,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 13:55:38,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 13:55:38,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 13:55:38,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 13:55:38,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 13:55:38,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 13:55:38,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 13:55:38,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 13:55:38,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 13:55:38,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 13:55:38,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 13:55:38,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 13:55:38,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 13:55:38,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 13:55:38,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 13:55:38,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 13:55:38,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 13:55:38,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 13:55:38,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 13:55:38,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 13:55:38,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 13:55:38,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 13:55:38,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 13:55:38,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 13:55:38,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 13:55:38,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 13:55:38,189 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-15 13:55:38,203 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 13:55:38,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 13:55:38,203 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 13:55:38,203 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 13:55:38,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 13:55:38,204 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 13:55:38,205 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 13:55:38,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 13:55:38,205 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 13:55:38,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 13:55:38,205 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 13:55:38,206 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 13:55:38,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 13:55:38,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 13:55:38,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 13:55:38,206 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 13:55:38,206 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 13:55:38,207 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 13:55:38,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 13:55:38,209 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 13:55:38,209 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 13:55:38,209 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 13:55:38,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 13:55:38,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 13:55:38,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 13:55:38,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:55:38,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 13:55:38,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 13:55:38,211 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 13:55:38,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 13:55:38,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 13:55:38,211 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 [2021-12-15 13:55:38,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 13:55:38,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 13:55:38,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 13:55:38,420 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 13:55:38,420 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 13:55:38,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2021-12-15 13:55:38,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69bdccf66/cd2ede2940414c37878c12732488f151/FLAGab94b1423 [2021-12-15 13:55:38,813 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 13:55:38,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2021-12-15 13:55:38,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69bdccf66/cd2ede2940414c37878c12732488f151/FLAGab94b1423 [2021-12-15 13:55:38,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69bdccf66/cd2ede2940414c37878c12732488f151 [2021-12-15 13:55:38,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 13:55:38,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 13:55:38,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 13:55:38,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 13:55:38,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 13:55:38,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:55:38" (1/1) ... [2021-12-15 13:55:38,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3569f670 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 13:55:38,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:55:38" (1/1) ... [2021-12-15 13:55:38,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 13:55:38,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:55:39,117 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:55:39,124 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 13:55:39,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:55:39,197 INFO L208 MainTranslator]: Completed translation [2021-12-15 13:55:39,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:39 WrapperNode [2021-12-15 13:55:39,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 13:55:39,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 13:55:39,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 13:55:39,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 13:55:39,206 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 13:55:39,227 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 13:55:39,244 INFO L137 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2021-12-15 13:55:39,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 13:55:39,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 13:55:39,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 13:55:39,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 13:55:39,252 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 13:55:39,252 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 13:55:39,256 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 13:55:39,265 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 13:55:39,269 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 13:55:39,273 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 13:55:39,274 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 13:55:39,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 13:55:39,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 13:55:39,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 13:55:39,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 13:55:39,291 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 13:55:39,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:55:39,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:39,330 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 13:55:39,332 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 13:55:39,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 13:55:39,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 13:55:39,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 13:55:39,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 13:55:39,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 13:55:39,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 13:55:39,454 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 13:55:39,455 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 13:55:39,636 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 13:55:39,641 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 13:55:39,642 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 13:55:39,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:55:39 BoogieIcfgContainer [2021-12-15 13:55:39,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 13:55:39,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 13:55:39,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 13:55:39,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 13:55:39,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 01:55:38" (1/3) ... [2021-12-15 13:55:39,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fcf897 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 13:55:39,652 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 13:55:39,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fcf897 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 13:55:39,653 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 13:55:39,654 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2021-12-15 13:55:39,657 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 13:55:39,664 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-12-15 13:55:39,705 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 13:55:39,712 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 13:55:39,713 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-12-15 13:55:39,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:39,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:55:39,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:39,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:55:39,735 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:39,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:39,739 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-15 13:55:39,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:39,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994535340] [2021-12-15 13:55:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:39,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:39,894 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 13:55:39,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:39,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994535340] [2021-12-15 13:55:39,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994535340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:39,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:39,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:55:39,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141911807] [2021-12-15 13:55:39,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:39,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:39,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:39,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:39,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:39,925 INFO L87 Difference]: Start difference. First operand has 34 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:39,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:39,970 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-12-15 13:55:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:39,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 13:55:39,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:39,977 INFO L225 Difference]: With dead ends: 60 [2021-12-15 13:55:39,977 INFO L226 Difference]: Without dead ends: 56 [2021-12-15 13:55:39,979 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 13:55:39,983 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 91 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 13:55:39,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 91 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-15 13:55:40,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2021-12-15 13:55:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 13:55:40,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-15 13:55:40,009 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2021-12-15 13:55:40,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:40,009 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-15 13:55:40,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,009 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-15 13:55:40,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:55:40,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:40,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:55:40,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 13:55:40,010 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:40,011 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2021-12-15 13:55:40,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:40,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846682170] [2021-12-15 13:55:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:40,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,066 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 13:55:40,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:40,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846682170] [2021-12-15 13:55:40,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846682170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:40,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:40,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:55:40,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73010677] [2021-12-15 13:55:40,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:40,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:55:40,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:40,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:55:40,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:55:40,070 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:40,095 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-12-15 13:55:40,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:55:40,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 13:55:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:40,096 INFO L225 Difference]: With dead ends: 32 [2021-12-15 13:55:40,097 INFO L226 Difference]: Without dead ends: 32 [2021-12-15 13:55:40,097 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 13:55:40,101 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:40,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 24 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-15 13:55:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-15 13:55:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.565217391304348) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-15 13:55:40,111 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-12-15 13:55:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:40,111 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-15 13:55:40,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-15 13:55:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:55:40,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:40,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:55:40,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 13:55:40,113 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:40,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:40,116 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2021-12-15 13:55:40,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:40,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529809568] [2021-12-15 13:55:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:40,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,178 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 13:55:40,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:40,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529809568] [2021-12-15 13:55:40,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529809568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:40,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:40,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:40,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170692087] [2021-12-15 13:55:40,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:40,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:40,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:40,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:40,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:40,183 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:40,215 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-12-15 13:55:40,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:40,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 13:55:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:40,217 INFO L225 Difference]: With dead ends: 31 [2021-12-15 13:55:40,217 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 13:55:40,218 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 13:55:40,222 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:40,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:40,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 13:55:40,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-15 13:55:40,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 13:55:40,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-12-15 13:55:40,228 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 6 [2021-12-15 13:55:40,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:40,228 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-12-15 13:55:40,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,228 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-12-15 13:55:40,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:55:40,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:40,229 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:55:40,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 13:55:40,229 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:40,230 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-15 13:55:40,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:40,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107132278] [2021-12-15 13:55:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:40,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,284 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 13:55:40,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:40,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107132278] [2021-12-15 13:55:40,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107132278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:40,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:40,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:40,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200837813] [2021-12-15 13:55:40,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:40,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:40,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:40,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:40,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:40,289 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:40,389 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-12-15 13:55:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:40,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 13:55:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:40,390 INFO L225 Difference]: With dead ends: 55 [2021-12-15 13:55:40,390 INFO L226 Difference]: Without dead ends: 55 [2021-12-15 13:55:40,391 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 13:55:40,391 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:40,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 39 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-15 13:55:40,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-12-15 13:55:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.52) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 13:55:40,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-12-15 13:55:40,394 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2021-12-15 13:55:40,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:40,395 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-12-15 13:55:40,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-12-15 13:55:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 13:55:40,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:40,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:40,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 13:55:40,396 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:40,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:40,396 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2021-12-15 13:55:40,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:40,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983741513] [2021-12-15 13:55:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:40,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,418 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 13:55:40,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:40,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983741513] [2021-12-15 13:55:40,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983741513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:40,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:40,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:40,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473386197] [2021-12-15 13:55:40,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:40,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:40,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:40,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:40,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:40,420 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:40,446 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-12-15 13:55:40,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:40,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 13:55:40,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:40,447 INFO L225 Difference]: With dead ends: 30 [2021-12-15 13:55:40,448 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 13:55:40,448 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 13:55:40,449 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:40,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 25 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 13:55:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-15 13:55:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 13:55:40,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-12-15 13:55:40,456 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 8 [2021-12-15 13:55:40,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:40,456 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-12-15 13:55:40,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,457 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-12-15 13:55:40,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 13:55:40,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:40,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:40,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 13:55:40,460 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:40,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:40,461 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2021-12-15 13:55:40,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:40,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122730960] [2021-12-15 13:55:40,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:40,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,543 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 13:55:40,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:40,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122730960] [2021-12-15 13:55:40,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122730960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:40,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:40,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 13:55:40,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841927802] [2021-12-15 13:55:40,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:40,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 13:55:40,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:40,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 13:55:40,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 13:55:40,546 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:40,588 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-12-15 13:55:40,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:55:40,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 13:55:40,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:40,591 INFO L225 Difference]: With dead ends: 42 [2021-12-15 13:55:40,591 INFO L226 Difference]: Without dead ends: 42 [2021-12-15 13:55:40,592 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 13:55:40,594 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:40,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:40,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-15 13:55:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2021-12-15 13:55:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.375) internal successors, (44), 36 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 13:55:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-12-15 13:55:40,602 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 8 [2021-12-15 13:55:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:40,602 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-12-15 13:55:40,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-12-15 13:55:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 13:55:40,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:40,603 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:40,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 13:55:40,604 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:40,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-15 13:55:40,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:40,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375991928] [2021-12-15 13:55:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:40,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,687 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 13:55:40,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:40,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375991928] [2021-12-15 13:55:40,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375991928] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:40,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997356758] [2021-12-15 13:55:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:40,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:40,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:40,695 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 13:55:40,696 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 13:55:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:40,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 13:55:40,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:40,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:40,839 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 13:55:40,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:40,951 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 13:55:40,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997356758] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:40,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:40,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-15 13:55:40,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258751691] [2021-12-15 13:55:40,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:40,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 13:55:40,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:40,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 13:55:40,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:55:40,953 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 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 13:55:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:41,104 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2021-12-15 13:55:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 13:55:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 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 10 [2021-12-15 13:55:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:41,105 INFO L225 Difference]: With dead ends: 87 [2021-12-15 13:55:41,106 INFO L226 Difference]: Without dead ends: 87 [2021-12-15 13:55:41,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-15 13:55:41,106 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 212 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:41,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 125 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:41,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-15 13:55:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 34. [2021-12-15 13:55:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-12-15 13:55:41,109 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 10 [2021-12-15 13:55:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:41,110 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-12-15 13:55:41,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 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 13:55:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-12-15 13:55:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 13:55:41,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:41,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:41,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:41,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:41,329 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:41,329 INFO L85 PathProgramCache]: Analyzing trace with hash -204603407, now seen corresponding path program 1 times [2021-12-15 13:55:41,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:41,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520783525] [2021-12-15 13:55:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:41,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:41,347 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 13:55:41,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:41,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520783525] [2021-12-15 13:55:41,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520783525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:41,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:41,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:41,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542936246] [2021-12-15 13:55:41,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:41,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:55:41,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:41,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:55:41,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:55:41,349 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 13:55:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:41,354 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-12-15 13:55:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:55:41,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 13:55:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:41,355 INFO L225 Difference]: With dead ends: 36 [2021-12-15 13:55:41,355 INFO L226 Difference]: Without dead ends: 36 [2021-12-15 13:55:41,356 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 13:55:41,356 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 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 13:55:41,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:41,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-15 13:55:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-15 13:55:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.3125) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-15 13:55:41,358 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 12 [2021-12-15 13:55:41,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:41,359 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-15 13:55:41,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 13:55:41,359 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-15 13:55:41,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 13:55:41,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:41,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:41,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 13:55:41,360 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:41,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:41,360 INFO L85 PathProgramCache]: Analyzing trace with hash 938762030, now seen corresponding path program 1 times [2021-12-15 13:55:41,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:41,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166779910] [2021-12-15 13:55:41,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:41,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:41,433 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 13:55:41,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:41,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166779910] [2021-12-15 13:55:41,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166779910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:41,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:41,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 13:55:41,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990089511] [2021-12-15 13:55:41,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:41,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 13:55:41,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:41,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 13:55:41,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 13:55:41,436 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:41,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:41,528 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-12-15 13:55:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 13:55:41,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-15 13:55:41,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:41,529 INFO L225 Difference]: With dead ends: 48 [2021-12-15 13:55:41,529 INFO L226 Difference]: Without dead ends: 48 [2021-12-15 13:55:41,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 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 13:55:41,531 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:41,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 128 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-15 13:55:41,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-12-15 13:55:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 40 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 13:55:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-15 13:55:41,536 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 14 [2021-12-15 13:55:41,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:41,536 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-15 13:55:41,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:41,536 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-15 13:55:41,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 13:55:41,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:41,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:41,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 13:55:41,537 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:41,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:41,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1196927468, now seen corresponding path program 1 times [2021-12-15 13:55:41,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:41,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349155783] [2021-12-15 13:55:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:41,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:41,666 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 13:55:41,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:41,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349155783] [2021-12-15 13:55:41,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349155783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:41,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:41,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 13:55:41,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406952258] [2021-12-15 13:55:41,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:41,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 13:55:41,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:41,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 13:55:41,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:55:41,668 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:41,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:41,763 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-12-15 13:55:41,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:55:41,763 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-15 13:55:41,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:41,764 INFO L225 Difference]: With dead ends: 57 [2021-12-15 13:55:41,764 INFO L226 Difference]: Without dead ends: 57 [2021-12-15 13:55:41,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-15 13:55:41,764 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:41,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 95 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:41,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-15 13:55:41,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2021-12-15 13:55:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-12-15 13:55:41,766 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 14 [2021-12-15 13:55:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:41,767 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-12-15 13:55:41,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-12-15 13:55:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 13:55:41,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:41,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:41,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 13:55:41,768 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1506335819, now seen corresponding path program 1 times [2021-12-15 13:55:41,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:41,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838893128] [2021-12-15 13:55:41,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:41,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:41,803 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 13:55:41,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:41,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838893128] [2021-12-15 13:55:41,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838893128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:41,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:41,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:41,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898987519] [2021-12-15 13:55:41,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:41,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:41,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:41,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:41,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:41,805 INFO L87 Difference]: Start difference. First operand 42 states and 49 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 13:55:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:41,814 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-12-15 13:55:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:41,815 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 13:55:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:41,815 INFO L225 Difference]: With dead ends: 41 [2021-12-15 13:55:41,815 INFO L226 Difference]: Without dead ends: 28 [2021-12-15 13:55:41,815 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 13:55:41,816 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:41,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:41,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-15 13:55:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-15 13:55:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-12-15 13:55:41,818 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2021-12-15 13:55:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:41,818 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-12-15 13:55:41,818 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 13:55:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-12-15 13:55:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 13:55:41,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:41,819 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:41,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 13:55:41,819 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:41,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:41,819 INFO L85 PathProgramCache]: Analyzing trace with hash 676448303, now seen corresponding path program 1 times [2021-12-15 13:55:41,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:41,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72941254] [2021-12-15 13:55:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:41,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:41,877 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 13:55:41,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:41,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72941254] [2021-12-15 13:55:41,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72941254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:41,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093312306] [2021-12-15 13:55:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:41,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:41,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:41,879 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 13:55:41,880 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 13:55:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:41,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 13:55:41,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:41,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:42,024 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 13:55:42,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:42,147 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 13:55:42,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093312306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:42,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:42,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-12-15 13:55:42,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135789072] [2021-12-15 13:55:42,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:42,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-15 13:55:42,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:42,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-15 13:55:42,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-15 13:55:42,149 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 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 13:55:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:42,275 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-12-15 13:55:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 13:55:42,276 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 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) Word has length 18 [2021-12-15 13:55:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:42,276 INFO L225 Difference]: With dead ends: 37 [2021-12-15 13:55:42,276 INFO L226 Difference]: Without dead ends: 33 [2021-12-15 13:55:42,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-12-15 13:55:42,277 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 130 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:42,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 66 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-15 13:55:42,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-12-15 13:55:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-12-15 13:55:42,278 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2021-12-15 13:55:42,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:42,278 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-12-15 13:55:42,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 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 13:55:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-12-15 13:55:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 13:55:42,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:42,279 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:42,298 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 13:55:42,479 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 13:55:42,479 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:42,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:42,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1434576067, now seen corresponding path program 2 times [2021-12-15 13:55:42,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:42,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025596683] [2021-12-15 13:55:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:42,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:42,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:42,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025596683] [2021-12-15 13:55:42,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025596683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:42,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972266397] [2021-12-15 13:55:42,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:55:42,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:42,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:42,663 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 13:55:42,664 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 13:55:42,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:55:42,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:42,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-15 13:55:42,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:42,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:42,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:55:43,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:55:43,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-15 13:55:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:43,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:43,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:55:43,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:55:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:43,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972266397] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:43,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:43,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2021-12-15 13:55:43,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937139047] [2021-12-15 13:55:43,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:43,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 13:55:43,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:43,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 13:55:43,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-12-15 13:55:43,716 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:44,199 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-12-15 13:55:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-15 13:55:44,200 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-15 13:55:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:44,200 INFO L225 Difference]: With dead ends: 54 [2021-12-15 13:55:44,201 INFO L226 Difference]: Without dead ends: 43 [2021-12-15 13:55:44,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-12-15 13:55:44,202 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:44,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 171 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 216 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2021-12-15 13:55:44,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-15 13:55:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-12-15 13:55:44,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-12-15 13:55:44,205 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 24 [2021-12-15 13:55:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:44,205 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-12-15 13:55:44,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-12-15 13:55:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 13:55:44,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:44,206 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:44,223 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 13:55:44,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:44,414 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:44,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:44,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1404730010, now seen corresponding path program 3 times [2021-12-15 13:55:44,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:44,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120536228] [2021-12-15 13:55:44,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:44,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:44,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:44,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120536228] [2021-12-15 13:55:44,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120536228] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:44,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746953915] [2021-12-15 13:55:44,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:55:44,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:44,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:44,684 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 13:55:44,685 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 13:55:44,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 13:55:44,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:44,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-15 13:55:44,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:44,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:44,906 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 13 treesize of output 9 [2021-12-15 13:55:45,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:55:45,247 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 17 treesize of output 17 [2021-12-15 13:55:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:45,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:45,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-15 13:55:45,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-15 13:55:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:46,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746953915] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:46,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:46,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 37 [2021-12-15 13:55:46,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499918691] [2021-12-15 13:55:46,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:46,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-15 13:55:46,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:46,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-15 13:55:46,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2021-12-15 13:55:46,142 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 37 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 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 13:55:46,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:46,668 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-12-15 13:55:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 13:55:46,669 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 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) Word has length 34 [2021-12-15 13:55:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:46,670 INFO L225 Difference]: With dead ends: 59 [2021-12-15 13:55:46,670 INFO L226 Difference]: Without dead ends: 42 [2021-12-15 13:55:46,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=265, Invalid=2087, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 13:55:46,672 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:46,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 260 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 216 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2021-12-15 13:55:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-15 13:55:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-12-15 13:55:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-12-15 13:55:46,678 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2021-12-15 13:55:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:46,678 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-12-15 13:55:46,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 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 13:55:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-12-15 13:55:46,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 13:55:46,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:46,682 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:46,700 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 13:55:46,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:46,896 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:46,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:46,896 INFO L85 PathProgramCache]: Analyzing trace with hash 746707293, now seen corresponding path program 4 times [2021-12-15 13:55:46,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:46,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521137171] [2021-12-15 13:55:46,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:46,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:47,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:47,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521137171] [2021-12-15 13:55:47,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521137171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:47,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553308363] [2021-12-15 13:55:47,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:55:47,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:47,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:47,044 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 13:55:47,045 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 13:55:47,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:55:47,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-15 13:55:47,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:47,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:47,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:47,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553308363] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:47,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:47,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2021-12-15 13:55:47,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139376548] [2021-12-15 13:55:47,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:47,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 13:55:47,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:47,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 13:55:47,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-12-15 13:55:47,645 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 26 states have (on average 4.0) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:47,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:47,911 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-12-15 13:55:47,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 13:55:47,912 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.0) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-15 13:55:47,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:47,912 INFO L225 Difference]: With dead ends: 50 [2021-12-15 13:55:47,912 INFO L226 Difference]: Without dead ends: 50 [2021-12-15 13:55:47,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 13:55:47,913 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 127 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:47,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 163 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:47,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-15 13:55:47,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-12-15 13:55:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-12-15 13:55:47,915 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 38 [2021-12-15 13:55:47,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:47,915 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-12-15 13:55:47,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.0) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-12-15 13:55:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 13:55:47,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:47,916 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:47,932 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 13:55:48,123 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,SelfDestructingSolverStorable14 [2021-12-15 13:55:48,123 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:48,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:48,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1090509681, now seen corresponding path program 5 times [2021-12-15 13:55:48,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:48,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553917094] [2021-12-15 13:55:48,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:48,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:48,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:48,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553917094] [2021-12-15 13:55:48,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553917094] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:48,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108333265] [2021-12-15 13:55:48,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:55:48,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:48,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:48,282 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 13:55:48,284 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 13:55:48,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-15 13:55:48,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:48,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-15 13:55:48,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:48,475 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 13:55:48,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:55:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:48,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:48,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:55:48,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:55:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:48,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108333265] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:48,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:48,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2021-12-15 13:55:48,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997824304] [2021-12-15 13:55:48,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:48,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 13:55:48,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:48,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 13:55:48,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-12-15 13:55:48,808 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 13:55:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:49,093 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2021-12-15 13:55:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-15 13:55:49,093 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 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 44 [2021-12-15 13:55:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:49,094 INFO L225 Difference]: With dead ends: 75 [2021-12-15 13:55:49,094 INFO L226 Difference]: Without dead ends: 52 [2021-12-15 13:55:49,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 13:55:49,095 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 112 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:49,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 239 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 336 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2021-12-15 13:55:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-15 13:55:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-12-15 13:55:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:49,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-12-15 13:55:49,097 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2021-12-15 13:55:49,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:49,097 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-12-15 13:55:49,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 13:55:49,097 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-12-15 13:55:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-15 13:55:49,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:49,097 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:49,114 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 13:55:49,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 13:55:49,307 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:49,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:49,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1893589620, now seen corresponding path program 6 times [2021-12-15 13:55:49,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:49,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948635491] [2021-12-15 13:55:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:49,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:49,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:49,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948635491] [2021-12-15 13:55:49,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948635491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:49,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516156855] [2021-12-15 13:55:49,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:55:49,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:49,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:49,470 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 13:55:49,471 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 13:55:49,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-15 13:55:49,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:49,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-15 13:55:49,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:49,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:49,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:50,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516156855] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:50,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:50,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2021-12-15 13:55:50,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772070992] [2021-12-15 13:55:50,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:50,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-15 13:55:50,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-15 13:55:50,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 13:55:50,278 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 34 states, 33 states have (on average 4.181818181818182) internal successors, (138), 34 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:50,641 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-12-15 13:55:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 13:55:50,641 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.181818181818182) internal successors, (138), 34 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-15 13:55:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:50,642 INFO L225 Difference]: With dead ends: 60 [2021-12-15 13:55:50,642 INFO L226 Difference]: Without dead ends: 60 [2021-12-15 13:55:50,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=1504, Unknown=0, NotChecked=0, Total=1892 [2021-12-15 13:55:50,643 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 336 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:50,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 179 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-15 13:55:50,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-12-15 13:55:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-12-15 13:55:50,644 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 48 [2021-12-15 13:55:50,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:50,644 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-12-15 13:55:50,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.181818181818182) internal successors, (138), 34 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-12-15 13:55:50,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 13:55:50,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:50,645 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:50,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-15 13:55:50,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:50,860 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:50,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1457490104, now seen corresponding path program 7 times [2021-12-15 13:55:50,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:50,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564372551] [2021-12-15 13:55:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:50,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:51,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:51,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564372551] [2021-12-15 13:55:51,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564372551] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:51,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620478539] [2021-12-15 13:55:51,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 13:55:51,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:51,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:51,081 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 13:55:51,109 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 13:55:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:51,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-15 13:55:51,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:51,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:51,378 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 13 treesize of output 9 [2021-12-15 13:55:51,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:55:51,899 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 13:55:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 57 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:51,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:52,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-15 13:55:52,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-15 13:55:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 50 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:52,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620478539] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:52,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:52,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2021-12-15 13:55:52,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517248873] [2021-12-15 13:55:52,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:52,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-15 13:55:52,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:52,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-15 13:55:52,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2021-12-15 13:55:52,983 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 43 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 43 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:53,550 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-12-15 13:55:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 13:55:53,550 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 43 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-15 13:55:53,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:53,551 INFO L225 Difference]: With dead ends: 91 [2021-12-15 13:55:53,551 INFO L226 Difference]: Without dead ends: 62 [2021-12-15 13:55:53,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=366, Invalid=3056, Unknown=0, NotChecked=0, Total=3422 [2021-12-15 13:55:53,552 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:53,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 411 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 326 Invalid, 0 Unknown, 135 Unchecked, 0.1s Time] [2021-12-15 13:55:53,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-15 13:55:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-12-15 13:55:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-12-15 13:55:53,553 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2021-12-15 13:55:53,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:53,554 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-12-15 13:55:53,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 43 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-12-15 13:55:53,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-15 13:55:53,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:53,554 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:53,571 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 13:55:53,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 13:55:53,755 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:53,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:53,755 INFO L85 PathProgramCache]: Analyzing trace with hash 454022795, now seen corresponding path program 8 times [2021-12-15 13:55:53,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:53,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076355159] [2021-12-15 13:55:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:53,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:54,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:54,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076355159] [2021-12-15 13:55:54,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076355159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:54,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779203905] [2021-12-15 13:55:54,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:55:54,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:54,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:54,032 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 13:55:54,033 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 13:55:54,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:55:54,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:54,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-15 13:55:54,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:54,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:54,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:54,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779203905] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:54,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:54,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2021-12-15 13:55:54,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210079854] [2021-12-15 13:55:54,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:54,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-15 13:55:54,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:54,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-15 13:55:54,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560 [2021-12-15 13:55:54,960 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 40 states, 39 states have (on average 4.205128205128205) internal successors, (164), 40 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:55,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:55,279 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-12-15 13:55:55,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 13:55:55,280 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.205128205128205) internal successors, (164), 40 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-15 13:55:55,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:55,280 INFO L225 Difference]: With dead ends: 70 [2021-12-15 13:55:55,280 INFO L226 Difference]: Without dead ends: 70 [2021-12-15 13:55:55,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=427, Invalid=1829, Unknown=0, NotChecked=0, Total=2256 [2021-12-15 13:55:55,281 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 242 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:55,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 339 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:55:55,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-15 13:55:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2021-12-15 13:55:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-12-15 13:55:55,283 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 58 [2021-12-15 13:55:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:55,283 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-12-15 13:55:55,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.205128205128205) internal successors, (164), 40 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:55,283 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-12-15 13:55:55,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 13:55:55,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:55,286 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:55,304 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 13:55:55,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:55,495 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:55,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:55,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1538965023, now seen corresponding path program 9 times [2021-12-15 13:55:55,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:55,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425037831] [2021-12-15 13:55:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:55,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:55,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:55,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425037831] [2021-12-15 13:55:55,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425037831] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:55,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964073379] [2021-12-15 13:55:55,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:55:55,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:55,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:55,726 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 13:55:55,727 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 13:55:55,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-15 13:55:55,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:55,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-15 13:55:55,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:55,980 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 13:55:56,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:55:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:56,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:56,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:55:56,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:55:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:56,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964073379] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:56,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:56,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2021-12-15 13:55:56,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77251488] [2021-12-15 13:55:56,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:56,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 13:55:56,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:56,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 13:55:56,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 13:55:56,424 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 13:55:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:56,993 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2021-12-15 13:55:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 13:55:56,993 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-15 13:55:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:56,994 INFO L225 Difference]: With dead ends: 107 [2021-12-15 13:55:56,994 INFO L226 Difference]: Without dead ends: 72 [2021-12-15 13:55:56,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1993, Unknown=0, NotChecked=0, Total=2256 [2021-12-15 13:55:56,994 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 137 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:56,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 445 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 13:55:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-15 13:55:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-12-15 13:55:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 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 13:55:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-12-15 13:55:56,996 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2021-12-15 13:55:56,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:56,996 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-12-15 13:55:56,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 13:55:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-12-15 13:55:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 13:55:56,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:56,997 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:57,023 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 13:55:57,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:57,207 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:57,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1159341474, now seen corresponding path program 10 times [2021-12-15 13:55:57,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:57,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330391594] [2021-12-15 13:55:57,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:57,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:57,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:57,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330391594] [2021-12-15 13:55:57,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330391594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:57,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258163350] [2021-12-15 13:55:57,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:55:57,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:57,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:57,408 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 13:55:57,408 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 13:55:57,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:55:57,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:57,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-15 13:55:57,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:57,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:57,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:58,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258163350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:58,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:55:58,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 44 [2021-12-15 13:55:58,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848336147] [2021-12-15 13:55:58,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:58,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-15 13:55:58,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:55:58,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-15 13:55:58,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1730, Unknown=0, NotChecked=0, Total=1980 [2021-12-15 13:55:58,420 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 45 states, 44 states have (on average 4.409090909090909) internal successors, (194), 45 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 13:55:59,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:59,063 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-12-15 13:55:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 13:55:59,064 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.409090909090909) internal successors, (194), 45 states have internal predecessors, (194), 0 states have call successors, (0), 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 13:55:59,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:59,064 INFO L225 Difference]: With dead ends: 80 [2021-12-15 13:55:59,064 INFO L226 Difference]: Without dead ends: 80 [2021-12-15 13:55:59,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=627, Invalid=2795, Unknown=0, NotChecked=0, Total=3422 [2021-12-15 13:55:59,066 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 317 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:59,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 402 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 13:55:59,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-15 13:55:59,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-12-15 13:55:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:59,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-12-15 13:55:59,067 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 68 [2021-12-15 13:55:59,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:59,067 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-12-15 13:55:59,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.409090909090909) internal successors, (194), 45 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 13:55:59,068 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-12-15 13:55:59,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 13:55:59,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:59,068 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:59,118 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 13:55:59,269 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,SelfDestructingSolverStorable20 [2021-12-15 13:55:59,269 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:55:59,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:59,269 INFO L85 PathProgramCache]: Analyzing trace with hash 591208438, now seen corresponding path program 11 times [2021-12-15 13:55:59,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:55:59,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158505184] [2021-12-15 13:55:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:59,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:55:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:59,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:55:59,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158505184] [2021-12-15 13:55:59,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158505184] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:59,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567668266] [2021-12-15 13:55:59,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:55:59,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:55:59,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:59,583 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 13:55:59,584 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 13:55:59,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-15 13:55:59,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:59,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-15 13:55:59,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:59,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:56:00,009 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 13:56:00,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:56:00,577 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 17 treesize of output 17 [2021-12-15 13:56:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:00,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:01,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:01,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 66 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:02,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567668266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:02,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:02,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 59 [2021-12-15 13:56:02,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937700256] [2021-12-15 13:56:02,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:02,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-15 13:56:02,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:02,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-15 13:56:02,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=3156, Unknown=0, NotChecked=0, Total=3422 [2021-12-15 13:56:02,001 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 59 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:03,045 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2021-12-15 13:56:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-15 13:56:03,045 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 59 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-15 13:56:03,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:03,046 INFO L225 Difference]: With dead ends: 134 [2021-12-15 13:56:03,046 INFO L226 Difference]: Without dead ends: 93 [2021-12-15 13:56:03,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=552, Invalid=5928, Unknown=0, NotChecked=0, Total=6480 [2021-12-15 13:56:03,048 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 200 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:03,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 938 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 877 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2021-12-15 13:56:03,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-15 13:56:03,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-12-15 13:56:03,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 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 13:56:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-12-15 13:56:03,051 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 74 [2021-12-15 13:56:03,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:03,051 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-12-15 13:56:03,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 59 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:03,051 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-12-15 13:56:03,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 13:56:03,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:03,052 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:03,070 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 13:56:03,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-15 13:56:03,263 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:56:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:03,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2078674125, now seen corresponding path program 12 times [2021-12-15 13:56:03,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:03,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862483465] [2021-12-15 13:56:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:03,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:03,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:03,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862483465] [2021-12-15 13:56:03,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862483465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:03,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535796963] [2021-12-15 13:56:03,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:56:03,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:03,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:03,560 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 13:56:03,561 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 13:56:03,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-15 13:56:03,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:03,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-15 13:56:03,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:03,908 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 13:56:04,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:56:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:04,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:04,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:04,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:04,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535796963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:04,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:04,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2021-12-15 13:56:04,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574395652] [2021-12-15 13:56:04,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:04,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 13:56:04,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:04,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 13:56:04,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 13:56:04,407 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 39 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 13:56:05,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:05,214 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2021-12-15 13:56:05,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-15 13:56:05,214 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 39 states have internal predecessors, (135), 0 states have call successors, (0), 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 84 [2021-12-15 13:56:05,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:05,215 INFO L225 Difference]: With dead ends: 139 [2021-12-15 13:56:05,215 INFO L226 Difference]: Without dead ends: 92 [2021-12-15 13:56:05,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 148 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=3027, Unknown=0, NotChecked=0, Total=3306 [2021-12-15 13:56:05,216 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 203 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:05,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 709 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1106 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2021-12-15 13:56:05,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-15 13:56:05,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2021-12-15 13:56:05,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-12-15 13:56:05,217 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2021-12-15 13:56:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:05,217 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-12-15 13:56:05,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 39 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 13:56:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-12-15 13:56:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-15 13:56:05,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:05,218 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:05,239 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 13:56:05,419 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,SelfDestructingSolverStorable22 [2021-12-15 13:56:05,419 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:56:05,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:05,419 INFO L85 PathProgramCache]: Analyzing trace with hash -53373744, now seen corresponding path program 13 times [2021-12-15 13:56:05,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:05,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714591395] [2021-12-15 13:56:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:05,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:05,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:05,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714591395] [2021-12-15 13:56:05,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714591395] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:05,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912333938] [2021-12-15 13:56:05,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 13:56:05,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:05,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:05,684 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 13:56:05,685 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 13:56:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:05,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-15 13:56:05,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:05,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:56:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:06,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 120 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:07,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912333938] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:07,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:07,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 56 [2021-12-15 13:56:07,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121054141] [2021-12-15 13:56:07,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:07,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-15 13:56:07,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:07,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-15 13:56:07,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=2811, Unknown=0, NotChecked=0, Total=3192 [2021-12-15 13:56:07,335 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 57 states, 56 states have (on average 4.535714285714286) internal successors, (254), 57 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 13:56:08,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:08,115 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-12-15 13:56:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-15 13:56:08,115 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 4.535714285714286) internal successors, (254), 57 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-15 13:56:08,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:08,116 INFO L225 Difference]: With dead ends: 100 [2021-12-15 13:56:08,116 INFO L226 Difference]: Without dead ends: 100 [2021-12-15 13:56:08,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=983, Invalid=4567, Unknown=0, NotChecked=0, Total=5550 [2021-12-15 13:56:08,118 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 550 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:08,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 647 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 13:56:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-15 13:56:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-12-15 13:56:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-12-15 13:56:08,125 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 88 [2021-12-15 13:56:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:08,126 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-12-15 13:56:08,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 4.535714285714286) internal successors, (254), 57 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 13:56:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-12-15 13:56:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-15 13:56:08,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:08,127 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:08,157 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 13:56:08,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:08,343 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:56:08,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:08,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1254356132, now seen corresponding path program 14 times [2021-12-15 13:56:08,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:08,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990743008] [2021-12-15 13:56:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:08,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:08,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:08,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990743008] [2021-12-15 13:56:08,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990743008] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:08,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867986829] [2021-12-15 13:56:08,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:56:08,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:08,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:08,799 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 13:56:08,800 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 13:56:08,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:56:08,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:08,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-15 13:56:08,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:08,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:56:09,261 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 13:56:10,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:56:10,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-15 13:56:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:11,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:12,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:12,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 120 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:13,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867986829] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:13,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:13,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2021-12-15 13:56:13,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604023344] [2021-12-15 13:56:13,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:13,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-15 13:56:13,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:13,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-15 13:56:13,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=4883, Unknown=0, NotChecked=0, Total=5256 [2021-12-15 13:56:13,414 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 73 states, 73 states have (on average 3.780821917808219) internal successors, (276), 73 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 13:56:14,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:14,994 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2021-12-15 13:56:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-15 13:56:14,994 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.780821917808219) internal successors, (276), 73 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-12-15 13:56:14,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:14,995 INFO L225 Difference]: With dead ends: 166 [2021-12-15 13:56:14,995 INFO L226 Difference]: Without dead ends: 113 [2021-12-15 13:56:14,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 161 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=754, Invalid=8948, Unknown=0, NotChecked=0, Total=9702 [2021-12-15 13:56:14,996 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 233 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:14,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1350 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1166 Invalid, 0 Unknown, 223 Unchecked, 0.4s Time] [2021-12-15 13:56:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-15 13:56:14,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2021-12-15 13:56:14,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-12-15 13:56:14,998 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 94 [2021-12-15 13:56:14,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:14,998 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-12-15 13:56:14,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.780821917808219) internal successors, (276), 73 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 13:56:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-12-15 13:56:14,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-15 13:56:14,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:14,999 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:15,037 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 13:56:15,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:15,200 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:56:15,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:15,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1800059013, now seen corresponding path program 15 times [2021-12-15 13:56:15,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:15,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286019744] [2021-12-15 13:56:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:15,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:15,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:15,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286019744] [2021-12-15 13:56:15,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286019744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:15,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135178657] [2021-12-15 13:56:15,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:56:15,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:15,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:15,623 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 13:56:15,624 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 13:56:15,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-15 13:56:15,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:15,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-15 13:56:15,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:16,089 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 13:56:16,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:56:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:16,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:16,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:16,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:16,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135178657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:16,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:16,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2021-12-15 13:56:16,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741640208] [2021-12-15 13:56:16,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:16,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-15 13:56:16,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:16,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-15 13:56:16,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1859, Unknown=0, NotChecked=0, Total=1980 [2021-12-15 13:56:16,686 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 13:56:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:17,844 INFO L93 Difference]: Finished difference Result 171 states and 172 transitions. [2021-12-15 13:56:17,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-15 13:56:17,845 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 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 104 [2021-12-15 13:56:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:17,846 INFO L225 Difference]: With dead ends: 171 [2021-12-15 13:56:17,846 INFO L226 Difference]: Without dead ends: 112 [2021-12-15 13:56:17,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 186 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=367, Invalid=4189, Unknown=0, NotChecked=0, Total=4556 [2021-12-15 13:56:17,846 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 383 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:17,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 1142 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1797 Invalid, 0 Unknown, 55 Unchecked, 0.6s Time] [2021-12-15 13:56:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-15 13:56:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-12-15 13:56:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 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 13:56:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-12-15 13:56:17,849 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2021-12-15 13:56:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:17,849 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-12-15 13:56:17,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 13:56:17,849 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-12-15 13:56:17,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 13:56:17,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:17,850 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:17,871 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 13:56:18,058 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,SelfDestructingSolverStorable25 [2021-12-15 13:56:18,059 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:56:18,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:18,059 INFO L85 PathProgramCache]: Analyzing trace with hash -631787522, now seen corresponding path program 16 times [2021-12-15 13:56:18,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:18,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661193134] [2021-12-15 13:56:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:18,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 120 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:18,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661193134] [2021-12-15 13:56:18,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661193134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956002956] [2021-12-15 13:56:18,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:56:18,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:18,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:18,399 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 13:56:18,435 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 13:56:18,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:56:18,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:18,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-15 13:56:18,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:18,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:56:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:19,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 190 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:20,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956002956] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:20,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:20,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 68 [2021-12-15 13:56:20,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677435591] [2021-12-15 13:56:20,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:20,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-15 13:56:20,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:20,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-15 13:56:20,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=4152, Unknown=0, NotChecked=0, Total=4692 [2021-12-15 13:56:20,025 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 69 states, 68 states have (on average 4.617647058823529) internal successors, (314), 69 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 13:56:20,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:20,839 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2021-12-15 13:56:20,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 13:56:20,840 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 4.617647058823529) internal successors, (314), 69 states have internal predecessors, (314), 0 states have call successors, (0), 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 108 [2021-12-15 13:56:20,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:20,840 INFO L225 Difference]: With dead ends: 120 [2021-12-15 13:56:20,840 INFO L226 Difference]: Without dead ends: 120 [2021-12-15 13:56:20,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1419, Invalid=6771, Unknown=0, NotChecked=0, Total=8190 [2021-12-15 13:56:20,841 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 467 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:20,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 757 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 13:56:20,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-15 13:56:20,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2021-12-15 13:56:20,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 13:56:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2021-12-15 13:56:20,843 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 108 [2021-12-15 13:56:20,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:20,843 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2021-12-15 13:56:20,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 4.617647058823529) internal successors, (314), 69 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 13:56:20,843 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2021-12-15 13:56:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-15 13:56:20,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:20,844 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:20,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:21,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-15 13:56:21,051 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:56:21,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:21,052 INFO L85 PathProgramCache]: Analyzing trace with hash 896038226, now seen corresponding path program 17 times [2021-12-15 13:56:21,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:21,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313442652] [2021-12-15 13:56:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:21,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:21,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:21,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313442652] [2021-12-15 13:56:21,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313442652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:21,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358173092] [2021-12-15 13:56:21,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:56:21,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:21,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:21,539 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 13:56:21,540 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 13:56:21,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-15 13:56:21,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:21,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-15 13:56:21,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:21,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:56:22,104 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 13:56:22,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:56:22,906 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 17 treesize of output 17 [2021-12-15 13:56:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 153 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:23,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:23,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:23,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 190 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:24,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358173092] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:24,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:24,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 83 [2021-12-15 13:56:24,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877475870] [2021-12-15 13:56:24,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:24,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-15 13:56:24,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:24,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-15 13:56:24,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=6328, Unknown=0, NotChecked=0, Total=6806 [2021-12-15 13:56:24,661 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 83 states, 83 states have (on average 4.048192771084337) internal successors, (336), 83 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 13:56:26,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:26,087 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2021-12-15 13:56:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-15 13:56:26,087 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 4.048192771084337) internal successors, (336), 83 states have internal predecessors, (336), 0 states have call successors, (0), 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 114 [2021-12-15 13:56:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:26,091 INFO L225 Difference]: With dead ends: 198 [2021-12-15 13:56:26,091 INFO L226 Difference]: Without dead ends: 133 [2021-12-15 13:56:26,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1059, Invalid=12051, Unknown=0, NotChecked=0, Total=13110 [2021-12-15 13:56:26,099 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 292 mSDsluCounter, 1859 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1908 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:26,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 1908 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1630 Invalid, 0 Unknown, 244 Unchecked, 0.4s Time] [2021-12-15 13:56:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-15 13:56:26,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2021-12-15 13:56:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 13:56:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-12-15 13:56:26,101 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 114 [2021-12-15 13:56:26,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:26,102 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-12-15 13:56:26,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 4.048192771084337) internal successors, (336), 83 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 13:56:26,102 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-12-15 13:56:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-15 13:56:26,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:26,102 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:26,119 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 13:56:26,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-15 13:56:26,320 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:56:26,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:26,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1772360151, now seen corresponding path program 18 times [2021-12-15 13:56:26,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:26,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744754116] [2021-12-15 13:56:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:26,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:26,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:26,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744754116] [2021-12-15 13:56:26,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744754116] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:26,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998474628] [2021-12-15 13:56:26,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:56:26,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:26,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:26,809 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 13:56:26,812 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 13:56:27,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-15 13:56:27,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:27,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-15 13:56:27,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:27,442 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 13:56:27,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:56:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:27,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:27,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:27,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:28,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998474628] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:28,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:28,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2021-12-15 13:56:28,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334618670] [2021-12-15 13:56:28,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:28,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-15 13:56:28,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:28,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-15 13:56:28,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 13:56:28,081 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 13:56:29,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:29,566 INFO L93 Difference]: Finished difference Result 203 states and 204 transitions. [2021-12-15 13:56:29,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-15 13:56:29,567 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 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 124 [2021-12-15 13:56:29,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:29,569 INFO L225 Difference]: With dead ends: 203 [2021-12-15 13:56:29,569 INFO L226 Difference]: Without dead ends: 132 [2021-12-15 13:56:29,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 224 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=419, Invalid=5587, Unknown=0, NotChecked=0, Total=6006 [2021-12-15 13:56:29,573 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 271 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 2513 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 2633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:29,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 1577 Invalid, 2633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2513 Invalid, 0 Unknown, 63 Unchecked, 0.8s Time] [2021-12-15 13:56:29,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-15 13:56:29,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2021-12-15 13:56:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 13:56:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-12-15 13:56:29,577 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2021-12-15 13:56:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:29,578 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-12-15 13:56:29,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 13:56:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-12-15 13:56:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-15 13:56:29,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:29,579 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:29,598 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 13:56:29,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-15 13:56:29,784 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:56:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:29,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1291843372, now seen corresponding path program 19 times [2021-12-15 13:56:29,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:29,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149679140] [2021-12-15 13:56:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:29,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 190 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:30,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:30,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149679140] [2021-12-15 13:56:30,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149679140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:30,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378287185] [2021-12-15 13:56:30,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 13:56:30,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:30,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:30,189 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 13:56:30,190 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 13:56:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:30,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-15 13:56:30,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:30,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:56:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:31,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 276 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:32,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378287185] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:32,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:32,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 80 [2021-12-15 13:56:32,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797901964] [2021-12-15 13:56:32,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:32,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-15 13:56:32,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:32,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-15 13:56:32,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=727, Invalid=5753, Unknown=0, NotChecked=0, Total=6480 [2021-12-15 13:56:32,994 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 81 states, 80 states have (on average 4.675) internal successors, (374), 81 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 13:56:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:34,577 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2021-12-15 13:56:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-15 13:56:34,578 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 4.675) internal successors, (374), 81 states have internal predecessors, (374), 0 states have call successors, (0), 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 128 [2021-12-15 13:56:34,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:34,578 INFO L225 Difference]: With dead ends: 140 [2021-12-15 13:56:34,578 INFO L226 Difference]: Without dead ends: 140 [2021-12-15 13:56:34,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2589 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1935, Invalid=9407, Unknown=0, NotChecked=0, Total=11342 [2021-12-15 13:56:34,579 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 749 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:34,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1295 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2062 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 13:56:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-15 13:56:34,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2021-12-15 13:56:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-12-15 13:56:34,581 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 128 [2021-12-15 13:56:34,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:34,581 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-12-15 13:56:34,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 4.675) internal successors, (374), 81 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 13:56:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-12-15 13:56:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-15 13:56:34,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:34,581 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:34,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-15 13:56:34,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:34,793 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:56:34,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:34,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1709056512, now seen corresponding path program 20 times [2021-12-15 13:56:34,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:34,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028744074] [2021-12-15 13:56:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:34,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:35,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:35,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028744074] [2021-12-15 13:56:35,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028744074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:35,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225422723] [2021-12-15 13:56:35,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:56:35,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:35,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:35,360 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 13:56:35,362 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 13:56:35,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:56:35,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-15 13:56:35,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:35,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:56:35,998 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 13:56:37,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:56:37,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-15 13:56:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 231 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:38,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:39,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 13:56:39,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-15 13:56:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 276 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:40,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225422723] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:40,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:40,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 97 [2021-12-15 13:56:40,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740201491] [2021-12-15 13:56:40,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:40,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-15 13:56:40,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:40,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-15 13:56:40,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=8695, Unknown=0, NotChecked=0, Total=9312 [2021-12-15 13:56:40,879 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 97 states, 97 states have (on average 4.082474226804123) internal successors, (396), 97 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 13:56:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:42,932 INFO L93 Difference]: Finished difference Result 230 states and 231 transitions. [2021-12-15 13:56:42,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-15 13:56:42,940 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.082474226804123) internal successors, (396), 97 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-12-15 13:56:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:42,944 INFO L225 Difference]: With dead ends: 230 [2021-12-15 13:56:42,944 INFO L226 Difference]: Without dead ends: 153 [2021-12-15 13:56:42,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1315, Invalid=16241, Unknown=0, NotChecked=0, Total=17556 [2021-12-15 13:56:42,946 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 318 mSDsluCounter, 2906 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 2963 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 593 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:42,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 2963 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2419 Invalid, 0 Unknown, 593 Unchecked, 0.6s Time] [2021-12-15 13:56:42,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-15 13:56:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 145. [2021-12-15 13:56:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 13:56:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-12-15 13:56:42,952 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 134 [2021-12-15 13:56:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:42,952 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-12-15 13:56:42,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.082474226804123) internal successors, (396), 97 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 13:56:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-12-15 13:56:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-15 13:56:42,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:42,963 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:42,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:43,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:43,169 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-15 13:56:43,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1309507799, now seen corresponding path program 21 times [2021-12-15 13:56:43,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:56:43,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147196703] [2021-12-15 13:56:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:43,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:56:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:43,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:56:43,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147196703] [2021-12-15 13:56:43,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147196703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:56:43,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056826634] [2021-12-15 13:56:43,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:56:43,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:43,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:56:43,811 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:56:43,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-15 13:56:44,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-15 13:56:44,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:44,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-15 13:56:44,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:44,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:56:44,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 13:56:44,627 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-15 13:56:44,627 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 20 treesize of output 16 [2021-12-15 13:56:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 806 trivial. 0 not checked. [2021-12-15 13:56:44,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:46,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-15 13:56:46,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-15 13:56:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 806 trivial. 0 not checked. [2021-12-15 13:56:46,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056826634] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:46,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:56:46,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 9, 9] total 51 [2021-12-15 13:56:46,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357423009] [2021-12-15 13:56:46,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:46,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-15 13:56:46,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:56:46,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-15 13:56:46,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2423, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 13:56:46,575 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 51 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:52,353 INFO L93 Difference]: Finished difference Result 234 states and 235 transitions. [2021-12-15 13:56:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-15 13:56:52,354 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 51 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-12-15 13:56:52,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:52,354 INFO L225 Difference]: With dead ends: 234 [2021-12-15 13:56:52,354 INFO L226 Difference]: Without dead ends: 0 [2021-12-15 13:56:52,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 262 SyntacticMatches, 10 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4174 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2404, Invalid=19058, Unknown=0, NotChecked=0, Total=21462 [2021-12-15 13:56:52,356 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 292 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 3944 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 4086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:52,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 1043 Invalid, 4086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3944 Invalid, 0 Unknown, 91 Unchecked, 1.2s Time] [2021-12-15 13:56:52,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-15 13:56:52,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-15 13:56:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-15 13:56:52,358 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 144 [2021-12-15 13:56:52,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:52,358 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-15 13:56:52,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 51 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:52,358 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-15 13:56:52,358 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-15 13:56:52,360 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (10 of 11 remaining) [2021-12-15 13:56:52,360 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (9 of 11 remaining) [2021-12-15 13:56:52,360 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (8 of 11 remaining) [2021-12-15 13:56:52,360 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (7 of 11 remaining) [2021-12-15 13:56:52,360 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (6 of 11 remaining) [2021-12-15 13:56:52,360 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (5 of 11 remaining) [2021-12-15 13:56:52,360 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (4 of 11 remaining) [2021-12-15 13:56:52,360 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (3 of 11 remaining) [2021-12-15 13:56:52,360 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (2 of 11 remaining) [2021-12-15 13:56:52,360 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (1 of 11 remaining) [2021-12-15 13:56:52,360 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2021-12-15 13:56:52,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:52,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:56:52,578 INFO L732 BasicCegarLoop]: Path program histogram: [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:52,579 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 13:56:52,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 01:56:52 BoogieIcfgContainer [2021-12-15 13:56:52,581 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 13:56:52,581 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 13:56:52,581 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 13:56:52,595 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 13:56:52,596 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:55:39" (3/4) ... [2021-12-15 13:56:52,611 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-15 13:56:52,620 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-12-15 13:56:52,620 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-15 13:56:52,620 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-15 13:56:52,620 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-15 13:56:52,646 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-15 13:56:52,646 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 13:56:52,646 INFO L158 Benchmark]: Toolchain (without parser) took 73807.75ms. Allocated memory was 117.4MB in the beginning and 302.0MB in the end (delta: 184.5MB). Free memory was 83.8MB in the beginning and 174.6MB in the end (delta: -90.8MB). Peak memory consumption was 94.8MB. Max. memory is 16.1GB. [2021-12-15 13:56:52,647 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 77.6MB. Free memory was 35.6MB in the beginning and 35.6MB in the end (delta: 36.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 13:56:52,647 INFO L158 Benchmark]: CACSL2BoogieTranslator took 358.45ms. Allocated memory is still 117.4MB. Free memory was 83.5MB in the beginning and 87.7MB in the end (delta: -4.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 13:56:52,647 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.90ms. Allocated memory is still 117.4MB. Free memory was 87.7MB in the beginning and 85.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 13:56:52,651 INFO L158 Benchmark]: Boogie Preprocessor took 43.63ms. Allocated memory is still 117.4MB. Free memory was 85.6MB in the beginning and 84.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 13:56:52,653 INFO L158 Benchmark]: RCFGBuilder took 353.97ms. Allocated memory is still 117.4MB. Free memory was 84.3MB in the beginning and 73.0MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-15 13:56:52,653 INFO L158 Benchmark]: TraceAbstraction took 72935.57ms. Allocated memory was 117.4MB in the beginning and 302.0MB in the end (delta: 184.5MB). Free memory was 72.4MB in the beginning and 177.9MB in the end (delta: -105.5MB). Peak memory consumption was 80.4MB. Max. memory is 16.1GB. [2021-12-15 13:56:52,653 INFO L158 Benchmark]: Witness Printer took 64.82ms. Allocated memory is still 302.0MB. Free memory was 177.9MB in the beginning and 174.6MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 13:56:52,654 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 77.6MB. Free memory was 35.6MB in the beginning and 35.6MB in the end (delta: 36.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 358.45ms. Allocated memory is still 117.4MB. Free memory was 83.5MB in the beginning and 87.7MB in the end (delta: -4.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.90ms. Allocated memory is still 117.4MB. Free memory was 87.7MB in the beginning and 85.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.63ms. Allocated memory is still 117.4MB. Free memory was 85.6MB in the beginning and 84.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 353.97ms. Allocated memory is still 117.4MB. Free memory was 84.3MB in the beginning and 73.0MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 72935.57ms. Allocated memory was 117.4MB in the beginning and 302.0MB in the end (delta: 184.5MB). Free memory was 72.4MB in the beginning and 177.9MB in the end (delta: -105.5MB). Peak memory consumption was 80.4MB. Max. memory is 16.1GB. * Witness Printer took 64.82ms. Allocated memory is still 302.0MB. Free memory was 177.9MB in the beginning and 174.6MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 34 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 72.9s, OverallIterations: 32, TraceHistogramMax: 14, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 23.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6168 SdHoareTripleChecker+Valid, 8.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6168 mSDsluCounter, 17677 SdHoareTripleChecker+Invalid, 6.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1742 IncrementalHoareTripleChecker+Unchecked, 16749 mSDsCounter, 937 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23899 IncrementalHoareTripleChecker+Invalid, 26578 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 937 mSolverCounterUnsat, 928 mSDtfsCounter, 23899 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4334 GetRequests, 2782 SyntacticMatches, 46 SemanticMatches, 1506 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 20297 ImplicationChecksByTransitivity, 37.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred in iteration=31, InterpolantAutomatonStates: 678, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 32 MinimizatonAttempts, 228 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 41.5s InterpolantComputationTime, 3408 NumberOfCodeBlocks, 3408 NumberOfCodeBlocksAsserted, 140 NumberOfCheckSat, 4988 ConstructedInterpolants, 428 QuantifiedInterpolants, 62134 SizeOfPredicates, 248 NumberOfNonLiveVariables, 6224 ConjunctsInSsa, 1139 ConjunctsInUnsatCore, 76 InterpolantComputations, 10 PerfectInterpolantSequences, 5367/18636 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-15 13:56:52,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE