./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2n_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2n_insert_unequal.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 97351642d4f3bf3f6d868e0a3719427b4c33bd5e0f87a93a325784728b912f03 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 06:03:35,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 06:03:35,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 06:03:35,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 06:03:35,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 06:03:35,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 06:03:35,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 06:03:35,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 06:03:35,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 06:03:35,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 06:03:35,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 06:03:35,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 06:03:35,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 06:03:35,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 06:03:35,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 06:03:35,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 06:03:35,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 06:03:35,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 06:03:35,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 06:03:35,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 06:03:35,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 06:03:35,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 06:03:35,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 06:03:35,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 06:03:35,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 06:03:35,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 06:03:35,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 06:03:35,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 06:03:35,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 06:03:35,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 06:03:35,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 06:03:35,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 06:03:35,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 06:03:35,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 06:03:35,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 06:03:35,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 06:03:35,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 06:03:35,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 06:03:35,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 06:03:35,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 06:03:35,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 06:03:35,461 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 06:03:35,482 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 06:03:35,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 06:03:35,483 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 06:03:35,483 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 06:03:35,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 06:03:35,484 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 06:03:35,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 06:03:35,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 06:03:35,485 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 06:03:35,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 06:03:35,485 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 06:03:35,485 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 06:03:35,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 06:03:35,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 06:03:35,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 06:03:35,486 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 06:03:35,486 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 06:03:35,486 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 06:03:35,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 06:03:35,486 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 06:03:35,486 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 06:03:35,486 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 06:03:35,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 06:03:35,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 06:03:35,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 06:03:35,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:03:35,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 06:03:35,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 06:03:35,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 06:03:35,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 06:03:35,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 06:03:35,488 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97351642d4f3bf3f6d868e0a3719427b4c33bd5e0f87a93a325784728b912f03 [2021-12-16 06:03:35,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 06:03:35,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 06:03:35,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 06:03:35,648 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 06:03:35,663 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 06:03:35,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_insert_unequal.i [2021-12-16 06:03:35,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc9a162e8/bf372f777bbc46369229116411e66ec3/FLAG794166734 [2021-12-16 06:03:36,181 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 06:03:36,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_insert_unequal.i [2021-12-16 06:03:36,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc9a162e8/bf372f777bbc46369229116411e66ec3/FLAG794166734 [2021-12-16 06:03:36,216 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc9a162e8/bf372f777bbc46369229116411e66ec3 [2021-12-16 06:03:36,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 06:03:36,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 06:03:36,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 06:03:36,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 06:03:36,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 06:03:36,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:03:36" (1/1) ... [2021-12-16 06:03:36,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b7af6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:03:36, skipping insertion in model container [2021-12-16 06:03:36,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:03:36" (1/1) ... [2021-12-16 06:03:36,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 06:03:36,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:03:36,635 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_insert_unequal.i[24989,25002] [2021-12-16 06:03:36,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:03:36,668 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 06:03:36,732 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_insert_unequal.i[24989,25002] [2021-12-16 06:03:36,733 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:03:36,755 INFO L208 MainTranslator]: Completed translation [2021-12-16 06:03:36,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:03:36 WrapperNode [2021-12-16 06:03:36,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 06:03:36,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 06:03:36,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 06:03:36,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 06:03:36,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:03:36" (1/1) ... [2021-12-16 06:03:36,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:03:36" (1/1) ... [2021-12-16 06:03:36,794 INFO L137 Inliner]: procedures = 127, calls = 48, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 168 [2021-12-16 06:03:36,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 06:03:36,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 06:03:36,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 06:03:36,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 06:03:36,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:03:36" (1/1) ... [2021-12-16 06:03:36,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:03:36" (1/1) ... [2021-12-16 06:03:36,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:03:36" (1/1) ... [2021-12-16 06:03:36,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:03:36" (1/1) ... [2021-12-16 06:03:36,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:03:36" (1/1) ... [2021-12-16 06:03:36,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:03:36" (1/1) ... [2021-12-16 06:03:36,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:03:36" (1/1) ... [2021-12-16 06:03:36,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 06:03:36,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 06:03:36,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 06:03:36,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 06:03:36,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:03:36" (1/1) ... [2021-12-16 06:03:36,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:03:36,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:03:36,883 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) [2021-12-16 06:03:36,885 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 [2021-12-16 06:03:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-12-16 06:03:36,908 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-12-16 06:03:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 06:03:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 06:03:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 06:03:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 06:03:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 06:03:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 06:03:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 06:03:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 06:03:36,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 06:03:36,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 06:03:36,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 06:03:36,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 06:03:36,985 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 06:03:36,987 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 06:03:37,015 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-12-16 06:03:37,280 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 06:03:37,285 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 06:03:37,288 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-16 06:03:37,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:03:37 BoogieIcfgContainer [2021-12-16 06:03:37,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 06:03:37,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 06:03:37,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 06:03:37,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 06:03:37,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 06:03:36" (1/3) ... [2021-12-16 06:03:37,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfe5c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:03:37, skipping insertion in model container [2021-12-16 06:03:37,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:03:36" (2/3) ... [2021-12-16 06:03:37,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfe5c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:03:37, skipping insertion in model container [2021-12-16 06:03:37,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:03:37" (3/3) ... [2021-12-16 06:03:37,306 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_insert_unequal.i [2021-12-16 06:03:37,310 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 06:03:37,310 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2021-12-16 06:03:37,342 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 06:03:37,347 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 [2021-12-16 06:03:37,347 INFO L340 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2021-12-16 06:03:37,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 70 states have (on average 2.157142857142857) internal successors, (151), 132 states have internal predecessors, (151), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:37,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-16 06:03:37,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:37,362 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-16 06:03:37,362 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:37,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:37,366 INFO L85 PathProgramCache]: Analyzing trace with hash 33471376, now seen corresponding path program 1 times [2021-12-16 06:03:37,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:37,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968543298] [2021-12-16 06:03:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:37,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:37,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:37,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968543298] [2021-12-16 06:03:37,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968543298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:37,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:03:37,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:03:37,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374576295] [2021-12-16 06:03:37,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:37,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:03:37,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:37,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:03:37,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:03:37,496 INFO L87 Difference]: Start difference. First operand has 134 states, 70 states have (on average 2.157142857142857) internal successors, (151), 132 states have internal predecessors, (151), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:37,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:37,637 INFO L93 Difference]: Finished difference Result 241 states and 266 transitions. [2021-12-16 06:03:37,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:03:37,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-12-16 06:03:37,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:37,649 INFO L225 Difference]: With dead ends: 241 [2021-12-16 06:03:37,649 INFO L226 Difference]: Without dead ends: 234 [2021-12-16 06:03:37,650 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 [2021-12-16 06:03:37,655 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 130 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:37,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 274 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:03:37,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-16 06:03:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 125. [2021-12-16 06:03:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 67 states have (on average 2.029850746268657) internal successors, (136), 124 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) [2021-12-16 06:03:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-12-16 06:03:37,684 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 5 [2021-12-16 06:03:37,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:37,685 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-12-16 06:03:37,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:37,685 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-12-16 06:03:37,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-16 06:03:37,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:37,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-16 06:03:37,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 06:03:37,686 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:37,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash 33471377, now seen corresponding path program 1 times [2021-12-16 06:03:37,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:37,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865422361] [2021-12-16 06:03:37,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:37,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:37,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:37,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865422361] [2021-12-16 06:03:37,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865422361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:37,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:03:37,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:03:37,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415565038] [2021-12-16 06:03:37,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:37,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:03:37,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:37,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:03:37,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:03:37,724 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:37,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:37,859 INFO L93 Difference]: Finished difference Result 233 states and 254 transitions. [2021-12-16 06:03:37,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:03:37,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-12-16 06:03:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:37,862 INFO L225 Difference]: With dead ends: 233 [2021-12-16 06:03:37,862 INFO L226 Difference]: Without dead ends: 233 [2021-12-16 06:03:37,864 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 [2021-12-16 06:03:37,865 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 128 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:37,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 268 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:03:37,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-16 06:03:37,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 122. [2021-12-16 06:03:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 121 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2021-12-16 06:03:37,875 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 5 [2021-12-16 06:03:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:37,876 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2021-12-16 06:03:37,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:37,876 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2021-12-16 06:03:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 06:03:37,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:37,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:37,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 06:03:37,877 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:37,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2100113040, now seen corresponding path program 1 times [2021-12-16 06:03:37,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:37,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027332120] [2021-12-16 06:03:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:37,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:37,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027332120] [2021-12-16 06:03:37,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027332120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:37,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:03:37,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:03:37,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132035527] [2021-12-16 06:03:37,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:37,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:03:37,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:37,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:03:37,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:03:37,929 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:37,937 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2021-12-16 06:03:37,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:03:37,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 06:03:37,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:37,939 INFO L225 Difference]: With dead ends: 132 [2021-12-16 06:03:37,939 INFO L226 Difference]: Without dead ends: 132 [2021-12-16 06:03:37,939 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 [2021-12-16 06:03:37,940 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 10 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:37,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 260 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:03:37,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-16 06:03:37,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 123. [2021-12-16 06:03:37,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 122 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2021-12-16 06:03:37,950 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 7 [2021-12-16 06:03:37,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:37,950 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2021-12-16 06:03:37,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2021-12-16 06:03:37,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 06:03:37,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:37,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:37,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 06:03:37,952 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:37,953 INFO L85 PathProgramCache]: Analyzing trace with hash 638916372, now seen corresponding path program 1 times [2021-12-16 06:03:37,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:37,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649129968] [2021-12-16 06:03:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:37,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:38,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:38,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649129968] [2021-12-16 06:03:38,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649129968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:38,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:03:38,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:03:38,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103032788] [2021-12-16 06:03:38,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:38,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:03:38,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:38,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:03:38,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:03:38,018 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:38,028 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2021-12-16 06:03:38,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:03:38,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-16 06:03:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:38,029 INFO L225 Difference]: With dead ends: 129 [2021-12-16 06:03:38,029 INFO L226 Difference]: Without dead ends: 129 [2021-12-16 06:03:38,030 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 [2021-12-16 06:03:38,030 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 1 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:38,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 255 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:03:38,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-16 06:03:38,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-12-16 06:03:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 73 states have (on average 1.904109589041096) internal successors, (139), 127 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 139 transitions. [2021-12-16 06:03:38,035 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 139 transitions. Word has length 9 [2021-12-16 06:03:38,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:38,035 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 139 transitions. [2021-12-16 06:03:38,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:38,036 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 139 transitions. [2021-12-16 06:03:38,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 06:03:38,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:38,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:38,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 06:03:38,037 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:38,037 INFO L85 PathProgramCache]: Analyzing trace with hash -763066913, now seen corresponding path program 1 times [2021-12-16 06:03:38,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:38,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152516338] [2021-12-16 06:03:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:38,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:38,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:38,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152516338] [2021-12-16 06:03:38,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152516338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:03:38,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684825627] [2021-12-16 06:03:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:38,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:38,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:03:38,123 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) [2021-12-16 06:03:38,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 06:03:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:38,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:03:38,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:03:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:38,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:03:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:38,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684825627] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:03:38,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 06:03:38,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-12-16 06:03:38,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119178046] [2021-12-16 06:03:38,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 06:03:38,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 06:03:38,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 06:03:38,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:03:38,303 INFO L87 Difference]: Start difference. First operand 128 states and 139 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:38,314 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2021-12-16 06:03:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:03:38,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-16 06:03:38,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:38,328 INFO L225 Difference]: With dead ends: 130 [2021-12-16 06:03:38,329 INFO L226 Difference]: Without dead ends: 130 [2021-12-16 06:03:38,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:03:38,330 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 16 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:38,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 509 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:03:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-16 06:03:38,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-16 06:03:38,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 75 states have (on average 1.88) internal successors, (141), 129 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 141 transitions. [2021-12-16 06:03:38,335 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 141 transitions. Word has length 14 [2021-12-16 06:03:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:38,335 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 141 transitions. [2021-12-16 06:03:38,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:38,336 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 141 transitions. [2021-12-16 06:03:38,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 06:03:38,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:38,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:38,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 06:03:38,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:38,551 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:38,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:38,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2097949021, now seen corresponding path program 1 times [2021-12-16 06:03:38,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:38,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053127719] [2021-12-16 06:03:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:38,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:38,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:38,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053127719] [2021-12-16 06:03:38,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053127719] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:03:38,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339763390] [2021-12-16 06:03:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:38,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:38,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:03:38,647 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) [2021-12-16 06:03:38,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 06:03:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:38,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 06:03:38,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:03:38,762 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 [2021-12-16 06:03:38,813 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 06:03:38,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-16 06:03:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:38,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:03:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:38,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339763390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:03:38,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 06:03:38,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2021-12-16 06:03:38,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119149759] [2021-12-16 06:03:38,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 06:03:38,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:03:38,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:38,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:03:38,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:03:38,974 INFO L87 Difference]: Start difference. First operand 130 states and 141 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 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) [2021-12-16 06:03:39,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:39,048 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2021-12-16 06:03:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:03:39,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 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) Word has length 16 [2021-12-16 06:03:39,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:39,049 INFO L225 Difference]: With dead ends: 141 [2021-12-16 06:03:39,049 INFO L226 Difference]: Without dead ends: 141 [2021-12-16 06:03:39,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:03:39,050 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 367 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:39,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 103 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-12-16 06:03:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-16 06:03:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2021-12-16 06:03:39,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 75 states have (on average 1.8666666666666667) internal successors, (140), 128 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 140 transitions. [2021-12-16 06:03:39,055 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 140 transitions. Word has length 16 [2021-12-16 06:03:39,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:39,055 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 140 transitions. [2021-12-16 06:03:39,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 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) [2021-12-16 06:03:39,055 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 140 transitions. [2021-12-16 06:03:39,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 06:03:39,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:39,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:39,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 06:03:39,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 06:03:39,273 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:39,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:39,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2097949020, now seen corresponding path program 1 times [2021-12-16 06:03:39,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:39,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756250811] [2021-12-16 06:03:39,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:39,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:39,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:39,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756250811] [2021-12-16 06:03:39,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756250811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:03:39,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437850349] [2021-12-16 06:03:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:39,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:39,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:03:39,367 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) [2021-12-16 06:03:39,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 06:03:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:39,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 06:03:39,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:03:39,442 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 [2021-12-16 06:03:39,446 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 [2021-12-16 06:03:39,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:03:39,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 06:03:39,502 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:03:39,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 06:03:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:39,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:03:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:39,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437850349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:03:39,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 06:03:39,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-16 06:03:39,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659927108] [2021-12-16 06:03:39,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 06:03:39,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 06:03:39,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:39,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 06:03:39,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-16 06:03:39,711 INFO L87 Difference]: Start difference. First operand 129 states and 140 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:39,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:39,839 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2021-12-16 06:03:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:03:39,841 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 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 [2021-12-16 06:03:39,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:39,841 INFO L225 Difference]: With dead ends: 140 [2021-12-16 06:03:39,841 INFO L226 Difference]: Without dead ends: 140 [2021-12-16 06:03:39,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-16 06:03:39,843 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 535 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:39,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 102 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 108 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2021-12-16 06:03:39,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-16 06:03:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2021-12-16 06:03:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 127 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 139 transitions. [2021-12-16 06:03:39,859 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 139 transitions. Word has length 16 [2021-12-16 06:03:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:39,859 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 139 transitions. [2021-12-16 06:03:39,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 139 transitions. [2021-12-16 06:03:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 06:03:39,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:39,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:39,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 06:03:40,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:40,065 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:40,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:40,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1307957328, now seen corresponding path program 2 times [2021-12-16 06:03:40,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:40,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632859147] [2021-12-16 06:03:40,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:40,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:40,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:40,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632859147] [2021-12-16 06:03:40,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632859147] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:03:40,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13382441] [2021-12-16 06:03:40,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 06:03:40,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:40,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:03:40,152 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) [2021-12-16 06:03:40,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 06:03:40,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 06:03:40,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 06:03:40,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 06:03:40,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:03:40,255 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 [2021-12-16 06:03:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 06:03:40,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:03:40,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13382441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:40,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 06:03:40,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-16 06:03:40,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699254054] [2021-12-16 06:03:40,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:40,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:03:40,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:40,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:03:40,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:03:40,266 INFO L87 Difference]: Start difference. First operand 128 states and 139 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 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) [2021-12-16 06:03:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:40,348 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2021-12-16 06:03:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:03:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 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 21 [2021-12-16 06:03:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:40,349 INFO L225 Difference]: With dead ends: 137 [2021-12-16 06:03:40,349 INFO L226 Difference]: Without dead ends: 137 [2021-12-16 06:03:40,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:03:40,350 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 110 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:40,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 89 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:03:40,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-16 06:03:40,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2021-12-16 06:03:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 75 states have (on average 1.8133333333333332) internal successors, (136), 124 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) [2021-12-16 06:03:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-12-16 06:03:40,355 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 21 [2021-12-16 06:03:40,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:40,355 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-12-16 06:03:40,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 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) [2021-12-16 06:03:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-12-16 06:03:40,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 06:03:40,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:40,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:40,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 06:03:40,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:40,573 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:40,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1307957327, now seen corresponding path program 1 times [2021-12-16 06:03:40,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:40,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502356856] [2021-12-16 06:03:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:40,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:40,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:40,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502356856] [2021-12-16 06:03:40,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502356856] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:03:40,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511879689] [2021-12-16 06:03:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:40,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:40,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:03:40,627 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) [2021-12-16 06:03:40,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 06:03:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:40,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:03:40,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:03:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:40,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:03:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:40,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511879689] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:03:40,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 06:03:40,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-12-16 06:03:40,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537398180] [2021-12-16 06:03:40,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 06:03:40,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:03:40,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:40,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:03:40,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:03:40,777 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:40,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:40,793 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2021-12-16 06:03:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:03:40,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-16 06:03:40,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:40,794 INFO L225 Difference]: With dead ends: 125 [2021-12-16 06:03:40,794 INFO L226 Difference]: Without dead ends: 125 [2021-12-16 06:03:40,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:03:40,795 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 239 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:40,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 124 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:03:40,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-16 06:03:40,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-12-16 06:03:40,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 75 states have (on average 1.8) internal successors, (135), 124 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) [2021-12-16 06:03:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2021-12-16 06:03:40,798 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 21 [2021-12-16 06:03:40,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:40,798 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2021-12-16 06:03:40,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:40,798 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2021-12-16 06:03:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 06:03:40,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:40,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:40,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 06:03:41,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:41,016 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:41,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2020822092, now seen corresponding path program 1 times [2021-12-16 06:03:41,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:41,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015753699] [2021-12-16 06:03:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:41,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 06:03:41,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:41,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015753699] [2021-12-16 06:03:41,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015753699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:41,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:03:41,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:03:41,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353946026] [2021-12-16 06:03:41,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:41,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:03:41,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:41,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:03:41,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:03:41,078 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:41,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:41,118 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2021-12-16 06:03:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:03:41,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-16 06:03:41,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:41,119 INFO L225 Difference]: With dead ends: 122 [2021-12-16 06:03:41,119 INFO L226 Difference]: Without dead ends: 122 [2021-12-16 06:03:41,120 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 [2021-12-16 06:03:41,120 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 110 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:41,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 84 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:03:41,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-16 06:03:41,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-12-16 06:03:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 75 states have (on average 1.76) internal successors, (132), 121 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:41,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2021-12-16 06:03:41,123 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 22 [2021-12-16 06:03:41,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:41,124 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2021-12-16 06:03:41,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2021-12-16 06:03:41,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 06:03:41,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:41,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:41,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 06:03:41,126 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:41,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:41,126 INFO L85 PathProgramCache]: Analyzing trace with hash 157247510, now seen corresponding path program 1 times [2021-12-16 06:03:41,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:41,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666100244] [2021-12-16 06:03:41,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:41,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:03:41,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:41,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666100244] [2021-12-16 06:03:41,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666100244] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:03:41,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976083953] [2021-12-16 06:03:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:41,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:41,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:03:41,228 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) [2021-12-16 06:03:41,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 06:03:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:41,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 06:03:41,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:03:41,332 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 [2021-12-16 06:03:41,346 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 06:03:41,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-16 06:03:41,407 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 06:03:41,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-16 06:03:41,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:03:41,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 06:03:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:03:41,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:03:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:03:43,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976083953] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:03:43,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 06:03:43,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-16 06:03:43,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692891847] [2021-12-16 06:03:43,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 06:03:43,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 06:03:43,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:43,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 06:03:43,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=151, Unknown=1, NotChecked=0, Total=210 [2021-12-16 06:03:43,914 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand has 15 states, 14 states have (on average 4.714285714285714) internal successors, (66), 15 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) [2021-12-16 06:03:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:44,008 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2021-12-16 06:03:44,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:03:44,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.714285714285714) internal successors, (66), 15 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 27 [2021-12-16 06:03:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:44,009 INFO L225 Difference]: With dead ends: 127 [2021-12-16 06:03:44,009 INFO L226 Difference]: Without dead ends: 127 [2021-12-16 06:03:44,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=73, Invalid=166, Unknown=1, NotChecked=0, Total=240 [2021-12-16 06:03:44,010 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 418 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:44,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 130 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 129 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2021-12-16 06:03:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-16 06:03:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-12-16 06:03:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 75 states have (on average 1.6666666666666667) internal successors, (125), 114 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2021-12-16 06:03:44,012 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 27 [2021-12-16 06:03:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:44,012 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2021-12-16 06:03:44,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.714285714285714) internal successors, (66), 15 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) [2021-12-16 06:03:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2021-12-16 06:03:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 06:03:44,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:44,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:44,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 06:03:44,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:44,223 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:44,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:44,224 INFO L85 PathProgramCache]: Analyzing trace with hash 157247511, now seen corresponding path program 1 times [2021-12-16 06:03:44,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:44,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884890993] [2021-12-16 06:03:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:44,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 06:03:44,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:44,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884890993] [2021-12-16 06:03:44,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884890993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:03:44,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578575536] [2021-12-16 06:03:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:44,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:44,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:03:44,322 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) [2021-12-16 06:03:44,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 06:03:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:44,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 06:03:44,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:03:44,502 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 [2021-12-16 06:03:44,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:03:44,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 06:03:44,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:03:44,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 06:03:44,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:03:44,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 06:03:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 06:03:44,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:03:44,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578575536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:44,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 06:03:44,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-16 06:03:44,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530099336] [2021-12-16 06:03:44,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:44,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:03:44,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:44,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:03:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:03:44,652 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:44,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:44,708 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2021-12-16 06:03:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:03:44,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-16 06:03:44,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:44,709 INFO L225 Difference]: With dead ends: 108 [2021-12-16 06:03:44,709 INFO L226 Difference]: Without dead ends: 108 [2021-12-16 06:03:44,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-16 06:03:44,709 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 185 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:44,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 71 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:03:44,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-16 06:03:44,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-12-16 06:03:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 75 states have (on average 1.5733333333333333) internal successors, (118), 107 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-12-16 06:03:44,711 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 27 [2021-12-16 06:03:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:44,712 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-12-16 06:03:44,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-12-16 06:03:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 06:03:44,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:44,712 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:44,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 06:03:44,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:44,920 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:44,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:44,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1248708524, now seen corresponding path program 1 times [2021-12-16 06:03:44,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:44,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370128886] [2021-12-16 06:03:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:44,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:03:45,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:45,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370128886] [2021-12-16 06:03:45,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370128886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:45,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:03:45,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 06:03:45,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138205116] [2021-12-16 06:03:45,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:45,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 06:03:45,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:45,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 06:03:45,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-16 06:03:45,074 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:45,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:45,335 INFO L93 Difference]: Finished difference Result 195 states and 216 transitions. [2021-12-16 06:03:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 06:03:45,335 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-16 06:03:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:45,336 INFO L225 Difference]: With dead ends: 195 [2021-12-16 06:03:45,336 INFO L226 Difference]: Without dead ends: 195 [2021-12-16 06:03:45,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-12-16 06:03:45,337 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 692 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:45,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 244 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:03:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-16 06:03:45,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 116. [2021-12-16 06:03:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 83 states have (on average 1.6506024096385543) internal successors, (137), 115 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2021-12-16 06:03:45,339 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 30 [2021-12-16 06:03:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:45,339 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2021-12-16 06:03:45,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2021-12-16 06:03:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 06:03:45,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:45,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:45,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 06:03:45,340 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:45,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:45,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1248708523, now seen corresponding path program 1 times [2021-12-16 06:03:45,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:45,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531549932] [2021-12-16 06:03:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:45,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:03:45,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:45,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531549932] [2021-12-16 06:03:45,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531549932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:45,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:03:45,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 06:03:45,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92485788] [2021-12-16 06:03:45,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:45,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 06:03:45,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:45,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 06:03:45,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 06:03:45,526 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 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) [2021-12-16 06:03:45,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:45,828 INFO L93 Difference]: Finished difference Result 184 states and 203 transitions. [2021-12-16 06:03:45,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 06:03:45,828 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 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) Word has length 30 [2021-12-16 06:03:45,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:45,829 INFO L225 Difference]: With dead ends: 184 [2021-12-16 06:03:45,829 INFO L226 Difference]: Without dead ends: 184 [2021-12-16 06:03:45,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-12-16 06:03:45,830 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 656 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:45,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 203 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:03:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-16 06:03:45,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 116. [2021-12-16 06:03:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 83 states have (on average 1.6265060240963856) internal successors, (135), 115 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) [2021-12-16 06:03:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2021-12-16 06:03:45,832 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 30 [2021-12-16 06:03:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:45,832 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2021-12-16 06:03:45,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 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) [2021-12-16 06:03:45,833 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2021-12-16 06:03:45,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 06:03:45,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:45,833 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:45,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 06:03:45,833 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:45,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:45,833 INFO L85 PathProgramCache]: Analyzing trace with hash -55260162, now seen corresponding path program 1 times [2021-12-16 06:03:45,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:45,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438916457] [2021-12-16 06:03:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:45,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 06:03:45,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:45,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438916457] [2021-12-16 06:03:45,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438916457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:45,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:03:45,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:03:45,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795621576] [2021-12-16 06:03:45,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:45,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:03:45,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:45,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:03:45,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:03:45,865 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:45,873 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2021-12-16 06:03:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:03:45,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-16 06:03:45,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:45,875 INFO L225 Difference]: With dead ends: 159 [2021-12-16 06:03:45,875 INFO L226 Difference]: Without dead ends: 159 [2021-12-16 06:03:45,875 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 [2021-12-16 06:03:45,875 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 68 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:45,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 196 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:03:45,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-16 06:03:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 111. [2021-12-16 06:03:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 78 states have (on average 1.564102564102564) internal successors, (122), 110 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:45,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2021-12-16 06:03:45,878 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 31 [2021-12-16 06:03:45,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:45,878 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2021-12-16 06:03:45,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:45,878 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2021-12-16 06:03:45,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 06:03:45,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:45,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:45,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 06:03:45,879 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:45,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:45,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1713045098, now seen corresponding path program 1 times [2021-12-16 06:03:45,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:45,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309404643] [2021-12-16 06:03:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:45,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 06:03:45,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:45,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309404643] [2021-12-16 06:03:45,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309404643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:45,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:03:45,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 06:03:45,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703499753] [2021-12-16 06:03:45,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:45,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 06:03:45,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:45,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 06:03:45,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:03:45,915 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 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) [2021-12-16 06:03:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:45,990 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2021-12-16 06:03:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:03:45,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-16 06:03:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:45,991 INFO L225 Difference]: With dead ends: 120 [2021-12-16 06:03:45,991 INFO L226 Difference]: Without dead ends: 120 [2021-12-16 06:03:45,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:03:45,992 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 254 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:45,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 106 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:03:45,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-16 06:03:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2021-12-16 06:03:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 78 states have (on average 1.5256410256410255) internal successors, (119), 107 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2021-12-16 06:03:45,994 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 32 [2021-12-16 06:03:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:45,994 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2021-12-16 06:03:45,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 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) [2021-12-16 06:03:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2021-12-16 06:03:45,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 06:03:45,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:45,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:45,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 06:03:45,995 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:45,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:45,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1713045097, now seen corresponding path program 1 times [2021-12-16 06:03:45,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:45,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843862912] [2021-12-16 06:03:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:45,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:03:46,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:46,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843862912] [2021-12-16 06:03:46,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843862912] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:03:46,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096625889] [2021-12-16 06:03:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:46,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:46,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:03:46,056 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) [2021-12-16 06:03:46,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 06:03:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:46,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:03:46,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:03:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 06:03:46,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:03:46,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096625889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:46,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 06:03:46,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-16 06:03:46,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744757343] [2021-12-16 06:03:46,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:46,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:03:46,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:46,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:03:46,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:03:46,240 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2021-12-16 06:03:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:46,251 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2021-12-16 06:03:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:03:46,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-16 06:03:46,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:46,252 INFO L225 Difference]: With dead ends: 107 [2021-12-16 06:03:46,252 INFO L226 Difference]: Without dead ends: 107 [2021-12-16 06:03:46,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:03:46,253 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 99 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:46,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 195 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:03:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-16 06:03:46,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-12-16 06:03:46,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 106 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-12-16 06:03:46,255 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 32 [2021-12-16 06:03:46,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:46,255 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-12-16 06:03:46,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2021-12-16 06:03:46,256 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-12-16 06:03:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 06:03:46,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:46,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:46,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 06:03:46,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 06:03:46,486 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:46,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:46,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1563834333, now seen corresponding path program 1 times [2021-12-16 06:03:46,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:46,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439903333] [2021-12-16 06:03:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:46,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:03:46,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:46,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439903333] [2021-12-16 06:03:46,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439903333] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:03:46,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212534034] [2021-12-16 06:03:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:46,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:46,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:03:46,556 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) [2021-12-16 06:03:46,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 06:03:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:46,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 06:03:46,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:03:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 06:03:46,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:03:46,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212534034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:46,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 06:03:46,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2021-12-16 06:03:46,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927068803] [2021-12-16 06:03:46,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:46,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 06:03:46,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:46,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 06:03:46,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:03:46,793 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:46,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:46,808 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2021-12-16 06:03:46,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:03:46,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-16 06:03:46,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:46,809 INFO L225 Difference]: With dead ends: 104 [2021-12-16 06:03:46,809 INFO L226 Difference]: Without dead ends: 104 [2021-12-16 06:03:46,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:03:46,810 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 173 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:46,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 136 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:03:46,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-16 06:03:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-12-16 06:03:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 76 states have (on average 1.486842105263158) internal successors, (113), 103 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:46,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2021-12-16 06:03:46,812 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 33 [2021-12-16 06:03:46,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:46,812 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2021-12-16 06:03:46,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:46,813 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2021-12-16 06:03:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 06:03:46,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:46,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:46,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 06:03:47,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 06:03:47,032 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:47,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1234225649, now seen corresponding path program 1 times [2021-12-16 06:03:47,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:47,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191992926] [2021-12-16 06:03:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:47,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 06:03:47,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:47,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191992926] [2021-12-16 06:03:47,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191992926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:47,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:03:47,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:03:47,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303349842] [2021-12-16 06:03:47,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:47,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:03:47,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:47,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:03:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:03:47,066 INFO L87 Difference]: Start difference. First operand 104 states and 113 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:47,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:47,149 INFO L93 Difference]: Finished difference Result 161 states and 177 transitions. [2021-12-16 06:03:47,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:03:47,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-16 06:03:47,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:47,150 INFO L225 Difference]: With dead ends: 161 [2021-12-16 06:03:47,150 INFO L226 Difference]: Without dead ends: 161 [2021-12-16 06:03:47,150 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 [2021-12-16 06:03:47,150 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 126 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:47,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 170 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:03:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-16 06:03:47,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 103. [2021-12-16 06:03:47,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 76 states have (on average 1.4736842105263157) internal successors, (112), 102 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:47,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2021-12-16 06:03:47,153 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 34 [2021-12-16 06:03:47,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:47,153 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2021-12-16 06:03:47,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2021-12-16 06:03:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 06:03:47,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:47,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:47,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 06:03:47,154 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:47,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:47,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1234225648, now seen corresponding path program 1 times [2021-12-16 06:03:47,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:47,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828039780] [2021-12-16 06:03:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:47,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 06:03:47,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:47,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828039780] [2021-12-16 06:03:47,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828039780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:47,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:03:47,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:03:47,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336328120] [2021-12-16 06:03:47,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:47,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:03:47,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:47,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:03:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:03:47,196 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:47,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:47,265 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2021-12-16 06:03:47,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:03:47,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-16 06:03:47,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:47,266 INFO L225 Difference]: With dead ends: 102 [2021-12-16 06:03:47,266 INFO L226 Difference]: Without dead ends: 102 [2021-12-16 06:03:47,266 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 [2021-12-16 06:03:47,267 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 78 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:47,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 130 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:03:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-16 06:03:47,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-12-16 06:03:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 101 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2021-12-16 06:03:47,269 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 34 [2021-12-16 06:03:47,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:47,269 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2021-12-16 06:03:47,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2021-12-16 06:03:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-16 06:03:47,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:47,270 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:47,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 06:03:47,270 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:47,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:47,270 INFO L85 PathProgramCache]: Analyzing trace with hash 393710610, now seen corresponding path program 1 times [2021-12-16 06:03:47,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:47,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025290607] [2021-12-16 06:03:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:47,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 06:03:47,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:47,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025290607] [2021-12-16 06:03:47,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025290607] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:03:47,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:03:47,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 06:03:47,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864187840] [2021-12-16 06:03:47,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:03:47,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 06:03:47,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:03:47,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 06:03:47,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:03:47,322 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:47,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:03:47,388 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2021-12-16 06:03:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:03:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-16 06:03:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:03:47,389 INFO L225 Difference]: With dead ends: 99 [2021-12-16 06:03:47,389 INFO L226 Difference]: Without dead ends: 99 [2021-12-16 06:03:47,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:03:47,389 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 238 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:03:47,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 83 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:03:47,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-16 06:03:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-12-16 06:03:47,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2021-12-16 06:03:47,392 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 35 [2021-12-16 06:03:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:03:47,392 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2021-12-16 06:03:47,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:03:47,392 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2021-12-16 06:03:47,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-16 06:03:47,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:03:47,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:03:47,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 06:03:47,393 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-12-16 06:03:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:03:47,393 INFO L85 PathProgramCache]: Analyzing trace with hash -522865965, now seen corresponding path program 1 times [2021-12-16 06:03:47,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:03:47,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777276576] [2021-12-16 06:03:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:47,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:03:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:47,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:03:47,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777276576] [2021-12-16 06:03:47,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777276576] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:03:47,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219283635] [2021-12-16 06:03:47,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:03:47,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:03:47,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:03:47,741 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) [2021-12-16 06:03:47,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 06:03:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:03:47,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-16 06:03:47,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:03:47,915 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 [2021-12-16 06:03:48,004 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 06:03:48,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-16 06:03:48,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 06:03:48,121 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 06:03:48,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 06:03:48,176 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 06:03:48,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2021-12-16 06:03:48,322 INFO L354 Elim1Store]: treesize reduction 90, result has 37.9 percent of original size [2021-12-16 06:03:48,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 69 [2021-12-16 06:03:48,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:03:48,391 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-16 06:03:48,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 73 [2021-12-16 06:03:48,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:03:48,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 64 [2021-12-16 06:03:48,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:03:48,443 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-16 06:03:48,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 73 [2021-12-16 06:03:48,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:03:48,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 64 [2021-12-16 06:03:48,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:03:48,494 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-16 06:03:48,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 73 [2021-12-16 06:03:48,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:03:48,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 64 [2021-12-16 06:03:48,548 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 49 treesize of output 37 [2021-12-16 06:03:48,634 INFO L354 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2021-12-16 06:03:48,635 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 32 [2021-12-16 06:03:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:03:48,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:03:48,869 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1702 (Array Int Int)) (v_ArrVal_1701 (Array Int Int))) (= (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1702))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_insert_~head#1.base|) |c_ULTIMATE.start_dll_insert_~head#1.offset|))) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1701) |c_ULTIMATE.start_dll_insert_~head#1.base|) |c_ULTIMATE.start_dll_insert_~head#1.offset|) 4))) 1)) is different from false [2021-12-16 06:03:48,891 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 72 treesize of output 64 [2021-12-16 06:03:48,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-16 06:03:51,377 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 06:03:51,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 101 [2021-12-16 06:03:51,626 INFO L354 Elim1Store]: treesize reduction 282, result has 44.3 percent of original size [2021-12-16 06:03:51,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 4338 treesize of output 4053 [2021-12-16 06:03:51,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 06:03:51,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4053 treesize of output 3817 [2021-12-16 06:03:51,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 06:03:51,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3817 treesize of output 3705