./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c --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/ldv-memsafety/ArraysOfVariableLength2.c -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 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 20:58:16,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 20:58:16,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 20:58:16,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 20:58:16,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 20:58:16,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 20:58:16,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 20:58:16,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 20:58:16,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 20:58:16,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 20:58:16,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 20:58:16,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 20:58:16,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 20:58:16,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 20:58:16,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 20:58:16,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 20:58:16,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 20:58:16,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 20:58:16,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 20:58:16,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 20:58:16,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 20:58:16,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 20:58:16,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 20:58:16,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 20:58:16,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 20:58:16,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 20:58:16,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 20:58:16,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 20:58:16,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 20:58:16,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 20:58:16,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 20:58:16,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 20:58:16,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 20:58:16,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 20:58:16,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 20:58:16,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 20:58:16,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 20:58:16,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 20:58:16,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 20:58:16,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 20:58:16,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 20:58:16,461 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 20:58:16,486 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 20:58:16,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 20:58:16,487 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 20:58:16,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 20:58:16,488 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 20:58:16,488 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 20:58:16,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 20:58:16,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 20:58:16,488 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 20:58:16,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 20:58:16,489 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 20:58:16,489 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 20:58:16,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 20:58:16,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 20:58:16,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 20:58:16,490 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 20:58:16,490 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 20:58:16,490 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 20:58:16,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 20:58:16,490 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 20:58:16,491 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 20:58:16,491 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 20:58:16,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 20:58:16,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 20:58:16,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 20:58:16,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:58:16,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 20:58:16,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 20:58:16,492 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 20:58:16,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 20:58:16,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 20:58:16,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 [2021-12-18 20:58:16,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 20:58:16,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 20:58:16,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 20:58:16,706 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 20:58:16,706 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 20:58:16,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2021-12-18 20:58:16,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97e352fbe/9799a034ebbd4cc39fc1b7dd1f5ce378/FLAG6e4b39019 [2021-12-18 20:58:17,098 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 20:58:17,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2021-12-18 20:58:17,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97e352fbe/9799a034ebbd4cc39fc1b7dd1f5ce378/FLAG6e4b39019 [2021-12-18 20:58:17,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97e352fbe/9799a034ebbd4cc39fc1b7dd1f5ce378 [2021-12-18 20:58:17,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 20:58:17,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 20:58:17,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 20:58:17,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 20:58:17,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 20:58:17,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:58:17" (1/1) ... [2021-12-18 20:58:17,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ddd392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:58:17, skipping insertion in model container [2021-12-18 20:58:17,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:58:17" (1/1) ... [2021-12-18 20:58:17,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 20:58:17,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 20:58:17,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:58:17,284 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 20:58:17,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:58:17,311 INFO L208 MainTranslator]: Completed translation [2021-12-18 20:58:17,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:58:17 WrapperNode [2021-12-18 20:58:17,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 20:58:17,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 20:58:17,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 20:58:17,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 20:58:17,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:58:17" (1/1) ... [2021-12-18 20:58:17,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:58:17" (1/1) ... [2021-12-18 20:58:17,342 INFO L137 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2021-12-18 20:58:17,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 20:58:17,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 20:58:17,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 20:58:17,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 20:58:17,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:58:17" (1/1) ... [2021-12-18 20:58:17,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:58:17" (1/1) ... [2021-12-18 20:58:17,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:58:17" (1/1) ... [2021-12-18 20:58:17,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:58:17" (1/1) ... [2021-12-18 20:58:17,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:58:17" (1/1) ... [2021-12-18 20:58:17,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:58:17" (1/1) ... [2021-12-18 20:58:17,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:58:17" (1/1) ... [2021-12-18 20:58:17,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 20:58:17,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 20:58:17,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 20:58:17,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 20:58:17,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:58:17" (1/1) ... [2021-12-18 20:58:17,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:58:17,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:58:17,399 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 20:58:17,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 20:58:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 20:58:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 20:58:17,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 20:58:17,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 20:58:17,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 20:58:17,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 20:58:17,468 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 20:58:17,469 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 20:58:17,576 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 20:58:17,580 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 20:58:17,580 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-18 20:58:17,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:58:17 BoogieIcfgContainer [2021-12-18 20:58:17,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 20:58:17,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 20:58:17,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 20:58:17,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 20:58:17,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 08:58:17" (1/3) ... [2021-12-18 20:58:17,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da24fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:58:17, skipping insertion in model container [2021-12-18 20:58:17,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:58:17" (2/3) ... [2021-12-18 20:58:17,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da24fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:58:17, skipping insertion in model container [2021-12-18 20:58:17,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:58:17" (3/3) ... [2021-12-18 20:58:17,597 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2.c [2021-12-18 20:58:17,601 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 20:58:17,601 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-12-18 20:58:17,657 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 20:58:17,662 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 20:58:17,675 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-12-18 20:58:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:17,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-18 20:58:17,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:17,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-18 20:58:17,714 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:17,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:17,717 INFO L85 PathProgramCache]: Analyzing trace with hash 28698921, now seen corresponding path program 1 times [2021-12-18 20:58:17,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:17,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565358234] [2021-12-18 20:58:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:17,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:17,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:17,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565358234] [2021-12-18 20:58:17,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565358234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:58:17,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:58:17,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:58:17,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093407738] [2021-12-18 20:58:17,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:58:17,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:58:17,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:17,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:58:17,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:58:17,922 INFO L87 Difference]: Start difference. First operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2021-12-18 20:58:18,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:18,001 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-12-18 20:58:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:58:18,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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 [2021-12-18 20:58:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:18,009 INFO L225 Difference]: With dead ends: 69 [2021-12-18 20:58:18,010 INFO L226 Difference]: Without dead ends: 65 [2021-12-18 20:58:18,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:58:18,016 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 69 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:18,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 84 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:58:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-18 20:58:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2021-12-18 20:58:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-12-18 20:58:18,047 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 5 [2021-12-18 20:58:18,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:18,047 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-12-18 20:58:18,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2021-12-18 20:58:18,047 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-12-18 20:58:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 20:58:18,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:18,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:18,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 20:58:18,048 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:18,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1809811544, now seen corresponding path program 1 times [2021-12-18 20:58:18,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:18,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99984344] [2021-12-18 20:58:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:18,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:18,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:18,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99984344] [2021-12-18 20:58:18,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99984344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:58:18,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:58:18,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:58:18,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997622613] [2021-12-18 20:58:18,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:58:18,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:58:18,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:18,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:58:18,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:58:18,123 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2021-12-18 20:58:18,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:18,200 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-12-18 20:58:18,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:58:18,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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 [2021-12-18 20:58:18,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:18,203 INFO L225 Difference]: With dead ends: 70 [2021-12-18 20:58:18,203 INFO L226 Difference]: Without dead ends: 70 [2021-12-18 20:58:18,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:58:18,209 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:18,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 116 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:58:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-18 20:58:18,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2021-12-18 20:58:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-12-18 20:58:18,221 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 7 [2021-12-18 20:58:18,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:18,222 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-12-18 20:58:18,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2021-12-18 20:58:18,223 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-12-18 20:58:18,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 20:58:18,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:18,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:18,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 20:58:18,225 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:18,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:18,226 INFO L85 PathProgramCache]: Analyzing trace with hash -489510905, now seen corresponding path program 1 times [2021-12-18 20:58:18,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:18,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564662894] [2021-12-18 20:58:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:18,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:18,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:18,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564662894] [2021-12-18 20:58:18,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564662894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:58:18,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:58:18,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:58:18,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053488098] [2021-12-18 20:58:18,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:58:18,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:58:18,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:58:18,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:58:18,295 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:18,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:18,335 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-12-18 20:58:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:58:18,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-18 20:58:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:18,337 INFO L225 Difference]: With dead ends: 75 [2021-12-18 20:58:18,337 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 20:58:18,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:58:18,342 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 61 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:18,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 152 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:58:18,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 20:58:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2021-12-18 20:58:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-12-18 20:58:18,349 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 11 [2021-12-18 20:58:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:18,349 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-12-18 20:58:18,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-12-18 20:58:18,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 20:58:18,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:18,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:18,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 20:58:18,350 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:18,352 INFO L85 PathProgramCache]: Analyzing trace with hash -489508983, now seen corresponding path program 1 times [2021-12-18 20:58:18,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:18,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857230956] [2021-12-18 20:58:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:18,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:18,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:18,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857230956] [2021-12-18 20:58:18,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857230956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:58:18,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:58:18,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:58:18,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233760144] [2021-12-18 20:58:18,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:58:18,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:58:18,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:18,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:58:18,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:58:18,417 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:18,447 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-18 20:58:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:58:18,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-18 20:58:18,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:18,450 INFO L225 Difference]: With dead ends: 43 [2021-12-18 20:58:18,450 INFO L226 Difference]: Without dead ends: 43 [2021-12-18 20:58:18,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:58:18,455 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:18,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 31 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:58:18,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-18 20:58:18,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-18 20:58:18,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:18,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-12-18 20:58:18,460 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2021-12-18 20:58:18,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:18,460 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-12-18 20:58:18,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:18,461 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-12-18 20:58:18,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 20:58:18,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:18,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:18,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 20:58:18,461 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:18,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:18,462 INFO L85 PathProgramCache]: Analyzing trace with hash -489508982, now seen corresponding path program 1 times [2021-12-18 20:58:18,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:18,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404503845] [2021-12-18 20:58:18,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:18,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:18,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:18,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404503845] [2021-12-18 20:58:18,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404503845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:58:18,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:58:18,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:58:18,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915838553] [2021-12-18 20:58:18,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:58:18,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:58:18,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:18,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:58:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:58:18,524 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:18,566 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-12-18 20:58:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:58:18,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-18 20:58:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:18,567 INFO L225 Difference]: With dead ends: 50 [2021-12-18 20:58:18,567 INFO L226 Difference]: Without dead ends: 50 [2021-12-18 20:58:18,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:58:18,568 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:18,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:58:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-18 20:58:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-12-18 20:58:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-12-18 20:58:18,571 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 11 [2021-12-18 20:58:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:18,571 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-12-18 20:58:18,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:18,572 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-12-18 20:58:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 20:58:18,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:18,572 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:18,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 20:58:18,572 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:18,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839934, now seen corresponding path program 1 times [2021-12-18 20:58:18,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:18,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333001162] [2021-12-18 20:58:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:18,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:18,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:18,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333001162] [2021-12-18 20:58:18,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333001162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:58:18,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:58:18,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:58:18,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515500908] [2021-12-18 20:58:18,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:58:18,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:58:18,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:18,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:58:18,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:58:18,659 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:18,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:18,682 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-12-18 20:58:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:58:18,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-18 20:58:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:18,683 INFO L225 Difference]: With dead ends: 47 [2021-12-18 20:58:18,683 INFO L226 Difference]: Without dead ends: 47 [2021-12-18 20:58:18,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:58:18,684 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:18,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:58:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-18 20:58:18,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-18 20:58:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-12-18 20:58:18,700 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 16 [2021-12-18 20:58:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:18,700 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-12-18 20:58:18,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:18,700 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-12-18 20:58:18,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 20:58:18,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:18,701 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:18,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 20:58:18,701 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:18,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839933, now seen corresponding path program 1 times [2021-12-18 20:58:18,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:18,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73576482] [2021-12-18 20:58:18,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:18,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:18,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:18,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73576482] [2021-12-18 20:58:18,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73576482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:58:18,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268441727] [2021-12-18 20:58:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:18,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:18,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:58:18,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:58:18,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 20:58:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:18,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 20:58:18,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:58:19,063 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:58:19,064 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 [2021-12-18 20:58:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:19,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:58:21,328 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~n#1_3| Int) (v_ArrVal_51 Int)) (or (< |v_ULTIMATE.start_foo_~n#1_3| |c_ULTIMATE.start_main_~i~2#1|) (< v_ArrVal_51 (* 4 |v_ULTIMATE.start_foo_~n#1_3|)) (and (<= 0 |c_ULTIMATE.start_main_~#b~0#1.offset|) (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_11| Int)) (<= (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4) (select (store |c_#length| |v_ULTIMATE.start_foo_~#a~0#1.base_11| v_ArrVal_51) |c_ULTIMATE.start_main_~#b~0#1.base|)))))) is different from false [2021-12-18 20:58:21,873 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~n#1_3| Int) (v_ArrVal_51 Int)) (or (< v_ArrVal_51 (* 4 |v_ULTIMATE.start_foo_~n#1_3|)) (< |v_ULTIMATE.start_foo_~n#1_3| (+ |c_ULTIMATE.start_main_~i~2#1| 1)) (and (<= 0 |c_ULTIMATE.start_main_~#b~0#1.offset|) (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_11| Int)) (<= (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4) (select (store |c_#length| |v_ULTIMATE.start_foo_~#a~0#1.base_11| v_ArrVal_51) |c_ULTIMATE.start_main_~#b~0#1.base|)))))) is different from false [2021-12-18 20:58:21,959 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 37 treesize of output 33 [2021-12-18 20:58:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-18 20:58:22,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268441727] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:58:22,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:58:22,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-18 20:58:22,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603319177] [2021-12-18 20:58:22,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:58:22,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 20:58:22,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:22,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 20:58:22,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=80, Unknown=2, NotChecked=38, Total=156 [2021-12-18 20:58:22,046 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:30,199 WARN L227 SmtUtils]: Spent 8.10s on a formula simplification. DAG size of input: 44 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:58:36,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:36,808 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-12-18 20:58:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 20:58:36,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-18 20:58:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:36,812 INFO L225 Difference]: With dead ends: 76 [2021-12-18 20:58:36,812 INFO L226 Difference]: Without dead ends: 76 [2021-12-18 20:58:36,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=101, Invalid=211, Unknown=2, NotChecked=66, Total=380 [2021-12-18 20:58:36,812 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:36,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 103 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 94 Invalid, 0 Unknown, 123 Unchecked, 0.1s Time] [2021-12-18 20:58:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-18 20:58:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 49. [2021-12-18 20:58:36,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-12-18 20:58:36,815 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 16 [2021-12-18 20:58:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:36,815 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-12-18 20:58:36,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:36,815 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-12-18 20:58:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 20:58:36,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:36,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:36,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-18 20:58:37,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:37,027 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:37,028 INFO L85 PathProgramCache]: Analyzing trace with hash -411440119, now seen corresponding path program 1 times [2021-12-18 20:58:37,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:37,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846149542] [2021-12-18 20:58:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:37,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:37,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:37,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846149542] [2021-12-18 20:58:37,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846149542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:58:37,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269465372] [2021-12-18 20:58:37,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:37,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:37,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:58:37,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:58:37,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 20:58:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:37,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 20:58:37,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:58:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:37,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:58:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:37,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269465372] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:58:37,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:58:37,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-18 20:58:37,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146110251] [2021-12-18 20:58:37,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:58:37,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:58:37,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:37,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:58:37,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:58:37,181 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:37,208 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2021-12-18 20:58:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:58:37,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-18 20:58:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:37,209 INFO L225 Difference]: With dead ends: 112 [2021-12-18 20:58:37,209 INFO L226 Difference]: Without dead ends: 112 [2021-12-18 20:58:37,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:58:37,210 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 138 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:37,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 123 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:58:37,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-18 20:58:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2021-12-18 20:58:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 92 states have (on average 1.391304347826087) internal successors, (128), 99 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:37,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2021-12-18 20:58:37,224 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 17 [2021-12-18 20:58:37,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:37,225 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2021-12-18 20:58:37,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:37,225 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2021-12-18 20:58:37,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 20:58:37,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:37,225 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:37,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 20:58:37,439 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,SelfDestructingSolverStorable7 [2021-12-18 20:58:37,440 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:37,440 INFO L85 PathProgramCache]: Analyzing trace with hash -411430410, now seen corresponding path program 1 times [2021-12-18 20:58:37,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:37,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936716650] [2021-12-18 20:58:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:37,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:58:37,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:37,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936716650] [2021-12-18 20:58:37,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936716650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:58:37,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:58:37,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:58:37,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720009227] [2021-12-18 20:58:37,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:58:37,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:58:37,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:37,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:58:37,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:58:37,483 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:37,495 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2021-12-18 20:58:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:58:37,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-12-18 20:58:37,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:37,496 INFO L225 Difference]: With dead ends: 99 [2021-12-18 20:58:37,496 INFO L226 Difference]: Without dead ends: 99 [2021-12-18 20:58:37,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:58:37,497 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:37,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:58:37,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-18 20:58:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-12-18 20:58:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 92 states have (on average 1.358695652173913) internal successors, (125), 98 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2021-12-18 20:58:37,500 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 17 [2021-12-18 20:58:37,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:37,500 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2021-12-18 20:58:37,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:37,501 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2021-12-18 20:58:37,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 20:58:37,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:37,501 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:37,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-18 20:58:37,501 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:37,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:37,502 INFO L85 PathProgramCache]: Analyzing trace with hash -411430409, now seen corresponding path program 1 times [2021-12-18 20:58:37,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:37,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262902323] [2021-12-18 20:58:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:37,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:37,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:37,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262902323] [2021-12-18 20:58:37,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262902323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:58:37,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330359896] [2021-12-18 20:58:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:37,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:37,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:58:37,575 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:58:37,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 20:58:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:37,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 20:58:37,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:58:37,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:58:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:37,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:58:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:37,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330359896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:58:37,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:58:37,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-18 20:58:37,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901926676] [2021-12-18 20:58:37,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:58:37,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:58:37,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:37,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:58:37,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:58:37,723 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:37,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:37,805 INFO L93 Difference]: Finished difference Result 146 states and 185 transitions. [2021-12-18 20:58:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:58:37,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 17 [2021-12-18 20:58:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:37,808 INFO L225 Difference]: With dead ends: 146 [2021-12-18 20:58:37,808 INFO L226 Difference]: Without dead ends: 146 [2021-12-18 20:58:37,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:58:37,809 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 81 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:37,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 68 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:58:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-18 20:58:37,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2021-12-18 20:58:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 95 states have (on average 1.3473684210526315) internal successors, (128), 101 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 128 transitions. [2021-12-18 20:58:37,822 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 128 transitions. Word has length 17 [2021-12-18 20:58:37,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:37,822 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 128 transitions. [2021-12-18 20:58:37,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 128 transitions. [2021-12-18 20:58:37,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 20:58:37,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:37,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:37,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 20:58:38,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:38,032 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:38,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:38,032 INFO L85 PathProgramCache]: Analyzing trace with hash 130511665, now seen corresponding path program 1 times [2021-12-18 20:58:38,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:38,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030030496] [2021-12-18 20:58:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:38,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:58:38,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:38,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030030496] [2021-12-18 20:58:38,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030030496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:58:38,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:58:38,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:58:38,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377213736] [2021-12-18 20:58:38,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:58:38,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:58:38,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:58:38,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:58:38,067 INFO L87 Difference]: Start difference. First operand 102 states and 128 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:38,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:38,086 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2021-12-18 20:58:38,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:58:38,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 20:58:38,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:38,087 INFO L225 Difference]: With dead ends: 101 [2021-12-18 20:58:38,087 INFO L226 Difference]: Without dead ends: 101 [2021-12-18 20:58:38,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:58:38,087 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:38,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 53 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:58:38,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-18 20:58:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-18 20:58:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 100 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:38,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2021-12-18 20:58:38,090 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 18 [2021-12-18 20:58:38,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:38,090 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2021-12-18 20:58:38,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:38,090 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2021-12-18 20:58:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 20:58:38,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:38,091 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:38,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 20:58:38,091 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:38,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:38,091 INFO L85 PathProgramCache]: Analyzing trace with hash 130511666, now seen corresponding path program 1 times [2021-12-18 20:58:38,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:38,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047994100] [2021-12-18 20:58:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:38,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:38,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:38,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047994100] [2021-12-18 20:58:38,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047994100] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:58:38,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319725248] [2021-12-18 20:58:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:38,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:38,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:58:38,123 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:58:38,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 20:58:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:38,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 20:58:38,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:58:38,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:38,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:58:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:38,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319725248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:58:38,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:58:38,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-18 20:58:38,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45845855] [2021-12-18 20:58:38,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:58:38,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:58:38,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:38,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:58:38,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:58:38,240 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:38,304 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2021-12-18 20:58:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:58:38,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 20:58:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:38,305 INFO L225 Difference]: With dead ends: 107 [2021-12-18 20:58:38,305 INFO L226 Difference]: Without dead ends: 107 [2021-12-18 20:58:38,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:58:38,306 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 62 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:38,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 117 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:58:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-18 20:58:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2021-12-18 20:58:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.2842105263157895) internal successors, (122), 100 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) [2021-12-18 20:58:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2021-12-18 20:58:38,308 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 18 [2021-12-18 20:58:38,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:38,308 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2021-12-18 20:58:38,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2021-12-18 20:58:38,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 20:58:38,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:38,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:38,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-18 20:58:38,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:38,522 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:38,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:38,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1752050598, now seen corresponding path program 1 times [2021-12-18 20:58:38,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:38,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510169869] [2021-12-18 20:58:38,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:38,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:38,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:38,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510169869] [2021-12-18 20:58:38,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510169869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:58:38,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174835472] [2021-12-18 20:58:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:38,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:38,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:58:38,567 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:58:38,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 20:58:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:38,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 20:58:38,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:58:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:38,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:58:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:38,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174835472] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:58:38,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:58:38,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-18 20:58:38,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519443285] [2021-12-18 20:58:38,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:58:38,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 20:58:38,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:38,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 20:58:38,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:58:38,717 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:38,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:38,819 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2021-12-18 20:58:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 20:58:38,820 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-18 20:58:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:38,820 INFO L225 Difference]: With dead ends: 101 [2021-12-18 20:58:38,820 INFO L226 Difference]: Without dead ends: 101 [2021-12-18 20:58:38,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:58:38,821 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 119 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:38,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 116 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:58:38,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-18 20:58:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-12-18 20:58:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 98 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) [2021-12-18 20:58:38,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2021-12-18 20:58:38,823 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 21 [2021-12-18 20:58:38,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:38,823 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2021-12-18 20:58:38,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:38,823 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2021-12-18 20:58:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 20:58:38,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:38,823 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:38,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 20:58:39,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-18 20:58:39,024 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:39,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:39,024 INFO L85 PathProgramCache]: Analyzing trace with hash -93493367, now seen corresponding path program 1 times [2021-12-18 20:58:39,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:39,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704416405] [2021-12-18 20:58:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:39,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:58:39,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:39,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704416405] [2021-12-18 20:58:39,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704416405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:58:39,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713184171] [2021-12-18 20:58:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:39,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:39,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:58:39,090 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:58:39,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 20:58:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 20:58:39,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:58:39,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:58:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:58:39,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:58:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:58:39,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713184171] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:58:39,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:58:39,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-18 20:58:39,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542519123] [2021-12-18 20:58:39,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:58:39,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 20:58:39,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:39,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 20:58:39,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:58:39,280 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:39,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:39,463 INFO L93 Difference]: Finished difference Result 160 states and 185 transitions. [2021-12-18 20:58:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 20:58:39,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-18 20:58:39,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:39,464 INFO L225 Difference]: With dead ends: 160 [2021-12-18 20:58:39,464 INFO L226 Difference]: Without dead ends: 160 [2021-12-18 20:58:39,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-12-18 20:58:39,465 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 146 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:39,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 82 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:58:39,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-18 20:58:39,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 102. [2021-12-18 20:58:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.25) internal successors, (120), 101 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:39,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2021-12-18 20:58:39,468 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 23 [2021-12-18 20:58:39,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:39,468 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2021-12-18 20:58:39,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:39,468 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2021-12-18 20:58:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 20:58:39,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:39,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:39,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 20:58:39,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:39,684 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:39,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1409452358, now seen corresponding path program 1 times [2021-12-18 20:58:39,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:39,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646369461] [2021-12-18 20:58:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:39,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:58:39,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:39,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646369461] [2021-12-18 20:58:39,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646369461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:58:39,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755048416] [2021-12-18 20:58:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:39,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:39,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:58:39,735 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:58:39,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 20:58:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:39,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 20:58:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:58:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:58:39,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:58:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:58:39,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755048416] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:58:39,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:58:39,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2021-12-18 20:58:39,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990852873] [2021-12-18 20:58:39,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:58:39,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 20:58:39,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:39,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 20:58:39,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:58:39,939 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:40,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:40,003 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2021-12-18 20:58:40,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:58:40,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-18 20:58:40,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:40,004 INFO L225 Difference]: With dead ends: 99 [2021-12-18 20:58:40,004 INFO L226 Difference]: Without dead ends: 99 [2021-12-18 20:58:40,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:58:40,004 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:40,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 103 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:58:40,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-18 20:58:40,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2021-12-18 20:58:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 92 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2021-12-18 20:58:40,006 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 27 [2021-12-18 20:58:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:40,006 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2021-12-18 20:58:40,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2021-12-18 20:58:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 20:58:40,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:40,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:40,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 20:58:40,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:40,215 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:40,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1360755252, now seen corresponding path program 1 times [2021-12-18 20:58:40,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:40,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139314398] [2021-12-18 20:58:40,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:40,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:58:40,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:40,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139314398] [2021-12-18 20:58:40,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139314398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:58:40,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761746886] [2021-12-18 20:58:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:40,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:40,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:58:40,282 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:58:40,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 20:58:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:40,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 20:58:40,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:58:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:58:40,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:58:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:58:40,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761746886] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:58:40,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:58:40,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-18 20:58:40,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319766852] [2021-12-18 20:58:40,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:58:40,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 20:58:40,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:40,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 20:58:40,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:58:40,521 INFO L87 Difference]: Start difference. First operand 93 states and 108 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:40,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:40,640 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2021-12-18 20:58:40,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 20:58:40,641 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-18 20:58:40,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:40,642 INFO L225 Difference]: With dead ends: 95 [2021-12-18 20:58:40,642 INFO L226 Difference]: Without dead ends: 95 [2021-12-18 20:58:40,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-12-18 20:58:40,643 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 174 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:40,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 165 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:58:40,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-18 20:58:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-12-18 20:58:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 91 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2021-12-18 20:58:40,646 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 27 [2021-12-18 20:58:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:40,646 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2021-12-18 20:58:40,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:58:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2021-12-18 20:58:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 20:58:40,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:40,647 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] [2021-12-18 20:58:40,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 20:58:40,864 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,SelfDestructingSolverStorable15 [2021-12-18 20:58:40,864 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:58:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:40,864 INFO L85 PathProgramCache]: Analyzing trace with hash -144329733, now seen corresponding path program 1 times [2021-12-18 20:58:40,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:40,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683714923] [2021-12-18 20:58:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:40,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:58:41,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:41,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683714923] [2021-12-18 20:58:41,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683714923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:58:41,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818128024] [2021-12-18 20:58:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:41,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:41,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:58:41,040 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:58:41,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 20:58:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:41,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-18 20:58:41,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:58:41,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 20:58:41,265 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 20:58:41,265 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-12-18 20:58:41,353 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 20:58:41,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-18 20:58:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:41,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:01,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-18 20:59:01,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-18 20:59:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:59:01,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818128024] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:01,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:01,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 15] total 32 [2021-12-18 20:59:01,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653580281] [2021-12-18 20:59:01,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:01,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 20:59:01,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:01,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 20:59:01,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=892, Unknown=3, NotChecked=0, Total=992 [2021-12-18 20:59:01,407 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:02,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:02,126 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2021-12-18 20:59:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 20:59:02,127 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-18 20:59:02,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:02,127 INFO L225 Difference]: With dead ends: 92 [2021-12-18 20:59:02,127 INFO L226 Difference]: Without dead ends: 92 [2021-12-18 20:59:02,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=341, Invalid=2308, Unknown=3, NotChecked=0, Total=2652 [2021-12-18 20:59:02,128 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:02,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 339 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 420 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2021-12-18 20:59:02,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-18 20:59:02,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-18 20:59:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.197674418604651) internal successors, (103), 91 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2021-12-18 20:59:02,130 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 31 [2021-12-18 20:59:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:02,130 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2021-12-18 20:59:02,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2021-12-18 20:59:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 20:59:02,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:02,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:59:02,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:02,331 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,SelfDestructingSolverStorable16 [2021-12-18 20:59:02,332 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2032716941, now seen corresponding path program 1 times [2021-12-18 20:59:02,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:02,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846638446] [2021-12-18 20:59:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:02,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:59:02,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:02,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846638446] [2021-12-18 20:59:02,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846638446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:02,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454464507] [2021-12-18 20:59:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:02,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:02,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:02,470 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:02,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 20:59:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:02,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 20:59:02,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:02,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:59:02,700 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 19 treesize of output 21 [2021-12-18 20:59:02,707 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:59:02,707 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 [2021-12-18 20:59:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:59:02,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:02,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:59:02,926 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 24 treesize of output 20 [2021-12-18 20:59:02,932 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 20:59:02,932 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 13 treesize of output 12 [2021-12-18 20:59:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:59:03,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454464507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:03,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:03,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2021-12-18 20:59:03,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743237306] [2021-12-18 20:59:03,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:03,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 20:59:03,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:03,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 20:59:03,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-18 20:59:03,070 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:03,325 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2021-12-18 20:59:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 20:59:03,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-18 20:59:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:03,326 INFO L225 Difference]: With dead ends: 145 [2021-12-18 20:59:03,326 INFO L226 Difference]: Without dead ends: 145 [2021-12-18 20:59:03,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-12-18 20:59:03,327 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 158 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:03,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 235 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 241 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2021-12-18 20:59:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-18 20:59:03,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 99. [2021-12-18 20:59:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1914893617021276) internal successors, (112), 98 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2021-12-18 20:59:03,330 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 41 [2021-12-18 20:59:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:03,330 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2021-12-18 20:59:03,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2021-12-18 20:59:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 20:59:03,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:03,331 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:59:03,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:03,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-18 20:59:03,549 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:03,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:03,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1410284307, now seen corresponding path program 1 times [2021-12-18 20:59:03,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:03,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913405374] [2021-12-18 20:59:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:03,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:59:03,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:03,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913405374] [2021-12-18 20:59:03,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913405374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:03,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406457670] [2021-12-18 20:59:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:03,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:03,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:03,626 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:03,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 20:59:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:03,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 20:59:03,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:03,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:59:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:59:03,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:59:03,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406457670] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:03,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:03,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-18 20:59:03,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211763964] [2021-12-18 20:59:03,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:03,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 20:59:03,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:03,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 20:59:03,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:59:03,947 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:04,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:04,080 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2021-12-18 20:59:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:59:04,081 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-18 20:59:04,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:04,082 INFO L225 Difference]: With dead ends: 126 [2021-12-18 20:59:04,082 INFO L226 Difference]: Without dead ends: 126 [2021-12-18 20:59:04,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:59:04,083 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 95 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:04,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 167 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:59:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-18 20:59:04,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2021-12-18 20:59:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.1875) internal successors, (114), 100 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2021-12-18 20:59:04,086 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 42 [2021-12-18 20:59:04,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:04,086 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2021-12-18 20:59:04,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:04,086 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2021-12-18 20:59:04,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 20:59:04,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:04,086 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:59:04,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:04,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:04,295 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:04,296 INFO L85 PathProgramCache]: Analyzing trace with hash 183114832, now seen corresponding path program 2 times [2021-12-18 20:59:04,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:04,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081317994] [2021-12-18 20:59:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:04,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:59:04,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:04,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081317994] [2021-12-18 20:59:04,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081317994] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:04,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739183403] [2021-12-18 20:59:04,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:59:04,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:04,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:04,361 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:04,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 20:59:04,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:59:04,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:59:04,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 20:59:04,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:59:04,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:59:04,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739183403] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:04,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:04,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-18 20:59:04,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585466718] [2021-12-18 20:59:04,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:04,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 20:59:04,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:04,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 20:59:04,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:59:04,619 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:04,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:04,814 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2021-12-18 20:59:04,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 20:59:04,814 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-18 20:59:04,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:04,815 INFO L225 Difference]: With dead ends: 118 [2021-12-18 20:59:04,815 INFO L226 Difference]: Without dead ends: 118 [2021-12-18 20:59:04,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-12-18 20:59:04,816 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 214 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:04,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 193 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:59:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-18 20:59:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2021-12-18 20:59:04,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 98 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-12-18 20:59:04,818 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 46 [2021-12-18 20:59:04,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:04,818 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-12-18 20:59:04,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-12-18 20:59:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 20:59:04,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:04,819 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-12-18 20:59:04,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:05,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:05,031 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:05,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:05,032 INFO L85 PathProgramCache]: Analyzing trace with hash 457132991, now seen corresponding path program 2 times [2021-12-18 20:59:05,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:05,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248119319] [2021-12-18 20:59:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:05,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:59:05,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:05,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248119319] [2021-12-18 20:59:05,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248119319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:05,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847382405] [2021-12-18 20:59:05,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:59:05,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:05,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:05,084 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:05,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 20:59:05,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:59:05,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:59:05,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 20:59:05,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:59:05,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:59:05,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847382405] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:05,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:05,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-18 20:59:05,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981563261] [2021-12-18 20:59:05,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:05,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 20:59:05,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:05,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 20:59:05,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:59:05,317 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:05,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:05,405 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2021-12-18 20:59:05,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:59:05,406 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 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 47 [2021-12-18 20:59:05,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:05,406 INFO L225 Difference]: With dead ends: 101 [2021-12-18 20:59:05,406 INFO L226 Difference]: Without dead ends: 101 [2021-12-18 20:59:05,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:59:05,407 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 73 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:05,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 156 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:59:05,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-18 20:59:05,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-12-18 20:59:05,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 98 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:05,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2021-12-18 20:59:05,409 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 47 [2021-12-18 20:59:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:05,409 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2021-12-18 20:59:05,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2021-12-18 20:59:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 20:59:05,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:05,409 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-12-18 20:59:05,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:05,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-18 20:59:05,619 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:05,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:05,620 INFO L85 PathProgramCache]: Analyzing trace with hash -269976254, now seen corresponding path program 3 times [2021-12-18 20:59:05,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:05,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981561743] [2021-12-18 20:59:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:05,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 20:59:05,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:05,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981561743] [2021-12-18 20:59:05,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981561743] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:05,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990353564] [2021-12-18 20:59:05,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:59:05,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:05,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:05,772 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:05,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 20:59:05,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-18 20:59:05,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:59:05,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 20:59:05,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:05,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:59:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 20:59:06,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 20:59:06,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990353564] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:06,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:06,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 17 [2021-12-18 20:59:06,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581867882] [2021-12-18 20:59:06,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:06,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 20:59:06,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:06,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 20:59:06,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-18 20:59:06,368 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:06,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:06,957 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-12-18 20:59:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 20:59:06,959 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 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 52 [2021-12-18 20:59:06,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:06,959 INFO L225 Difference]: With dead ends: 128 [2021-12-18 20:59:06,959 INFO L226 Difference]: Without dead ends: 128 [2021-12-18 20:59:06,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 20:59:06,960 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 226 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:06,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 203 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:59:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-18 20:59:06,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2021-12-18 20:59:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 95 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2021-12-18 20:59:06,962 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 52 [2021-12-18 20:59:06,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:06,962 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2021-12-18 20:59:06,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2021-12-18 20:59:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 20:59:06,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:06,963 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-18 20:59:06,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:07,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:07,169 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:07,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1642790799, now seen corresponding path program 2 times [2021-12-18 20:59:07,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:07,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870806937] [2021-12-18 20:59:07,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:07,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 20:59:07,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:07,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870806937] [2021-12-18 20:59:07,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870806937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:07,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056497476] [2021-12-18 20:59:07,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:59:07,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:07,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:07,228 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:07,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 20:59:07,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:59:07,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:59:07,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 20:59:07,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 20:59:07,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 20:59:07,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056497476] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:07,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:07,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-18 20:59:07,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650772362] [2021-12-18 20:59:07,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:07,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 20:59:07,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:07,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 20:59:07,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:59:07,541 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:07,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:07,675 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2021-12-18 20:59:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 20:59:07,676 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-18 20:59:07,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:07,676 INFO L225 Difference]: With dead ends: 110 [2021-12-18 20:59:07,676 INFO L226 Difference]: Without dead ends: 110 [2021-12-18 20:59:07,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-18 20:59:07,677 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 97 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:07,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 294 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:59:07,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-18 20:59:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2021-12-18 20:59:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.11) internal successors, (111), 103 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) [2021-12-18 20:59:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2021-12-18 20:59:07,679 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 56 [2021-12-18 20:59:07,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:07,679 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2021-12-18 20:59:07,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2021-12-18 20:59:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 20:59:07,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:07,680 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-18 20:59:07,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:07,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:07,882 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:07,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:07,883 INFO L85 PathProgramCache]: Analyzing trace with hash 74449076, now seen corresponding path program 3 times [2021-12-18 20:59:07,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:07,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414560134] [2021-12-18 20:59:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:07,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 20:59:08,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:08,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414560134] [2021-12-18 20:59:08,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414560134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:08,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690820630] [2021-12-18 20:59:08,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:59:08,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:08,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:08,108 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:08,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 20:59:08,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 20:59:08,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:59:08,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-18 20:59:08,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:08,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:59:08,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:59:08,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:59:08,247 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 [2021-12-18 20:59:08,252 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:59:08,252 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 [2021-12-18 20:59:08,362 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:59:08,363 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 [2021-12-18 20:59:08,366 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 [2021-12-18 20:59:08,563 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:59:08,563 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 [2021-12-18 20:59:08,583 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:59:08,583 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 [2021-12-18 20:59:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:59:08,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:09,293 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 20:59:09,294 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 13 treesize of output 12 [2021-12-18 20:59:10,814 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 20:59:10,814 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 13 treesize of output 12 [2021-12-18 20:59:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:59:11,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690820630] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:11,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:11,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 28 [2021-12-18 20:59:11,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163772179] [2021-12-18 20:59:11,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:11,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 20:59:11,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:11,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 20:59:11,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-12-18 20:59:11,649 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:12,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:12,286 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2021-12-18 20:59:12,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 20:59:12,286 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 0 states have call successors, (0), 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 60 [2021-12-18 20:59:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:12,287 INFO L225 Difference]: With dead ends: 169 [2021-12-18 20:59:12,287 INFO L226 Difference]: Without dead ends: 169 [2021-12-18 20:59:12,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=384, Invalid=1508, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 20:59:12,288 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 273 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:12,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 228 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 193 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2021-12-18 20:59:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-18 20:59:12,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 163. [2021-12-18 20:59:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 159 states have (on average 1.1320754716981132) internal successors, (180), 162 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 180 transitions. [2021-12-18 20:59:12,290 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 180 transitions. Word has length 60 [2021-12-18 20:59:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:12,290 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 180 transitions. [2021-12-18 20:59:12,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 180 transitions. [2021-12-18 20:59:12,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-18 20:59:12,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:12,291 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-12-18 20:59:12,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:12,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-18 20:59:12,491 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:12,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:12,492 INFO L85 PathProgramCache]: Analyzing trace with hash -809246151, now seen corresponding path program 1 times [2021-12-18 20:59:12,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:12,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625158712] [2021-12-18 20:59:12,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:12,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 33 proven. 92 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 20:59:12,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:12,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625158712] [2021-12-18 20:59:12,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625158712] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:12,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055010816] [2021-12-18 20:59:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:12,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:12,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:12,613 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:12,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 20:59:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:12,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 20:59:12,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:12,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:59:12,859 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 19 treesize of output 21 [2021-12-18 20:59:12,863 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:59:12,863 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 [2021-12-18 20:59:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:59:12,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:13,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:59:13,108 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 24 treesize of output 20 [2021-12-18 20:59:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:59:13,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055010816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:13,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:13,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2021-12-18 20:59:13,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253031978] [2021-12-18 20:59:13,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:13,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 20:59:13,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:13,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 20:59:13,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-12-18 20:59:13,308 INFO L87 Difference]: Start difference. First operand 163 states and 180 transitions. Second operand has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:13,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:13,749 INFO L93 Difference]: Finished difference Result 244 states and 274 transitions. [2021-12-18 20:59:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 20:59:13,750 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-18 20:59:13,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:13,751 INFO L225 Difference]: With dead ends: 244 [2021-12-18 20:59:13,751 INFO L226 Difference]: Without dead ends: 244 [2021-12-18 20:59:13,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=1109, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 20:59:13,752 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 240 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:13,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 481 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 491 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2021-12-18 20:59:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-18 20:59:13,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 175. [2021-12-18 20:59:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 171 states have (on average 1.1403508771929824) internal successors, (195), 174 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 195 transitions. [2021-12-18 20:59:13,755 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 195 transitions. Word has length 75 [2021-12-18 20:59:13,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:13,755 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 195 transitions. [2021-12-18 20:59:13,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 195 transitions. [2021-12-18 20:59:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-18 20:59:13,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:13,756 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-12-18 20:59:13,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:13,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:13,957 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:13,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:13,957 INFO L85 PathProgramCache]: Analyzing trace with hash 683173057, now seen corresponding path program 1 times [2021-12-18 20:59:13,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:13,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762109173] [2021-12-18 20:59:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:13,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 88 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:59:14,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762109173] [2021-12-18 20:59:14,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762109173] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375400849] [2021-12-18 20:59:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:14,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:14,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:14,064 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:14,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 20:59:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:14,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 20:59:14,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:14,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:59:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:59:14,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:59:14,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375400849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:14,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:14,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2021-12-18 20:59:14,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021602895] [2021-12-18 20:59:14,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:14,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 20:59:14,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:14,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 20:59:14,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:59:14,512 INFO L87 Difference]: Start difference. First operand 175 states and 195 transitions. Second operand has 15 states, 14 states have (on average 7.285714285714286) internal successors, (102), 15 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:14,723 INFO L93 Difference]: Finished difference Result 223 states and 249 transitions. [2021-12-18 20:59:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 20:59:14,723 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 7.285714285714286) internal successors, (102), 15 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-18 20:59:14,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:14,724 INFO L225 Difference]: With dead ends: 223 [2021-12-18 20:59:14,724 INFO L226 Difference]: Without dead ends: 223 [2021-12-18 20:59:14,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-12-18 20:59:14,725 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 81 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:14,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 292 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:59:14,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-18 20:59:14,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 178. [2021-12-18 20:59:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 174 states have (on average 1.1379310344827587) internal successors, (198), 177 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 198 transitions. [2021-12-18 20:59:14,727 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 198 transitions. Word has length 76 [2021-12-18 20:59:14,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:14,728 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 198 transitions. [2021-12-18 20:59:14,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 7.285714285714286) internal successors, (102), 15 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 198 transitions. [2021-12-18 20:59:14,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-18 20:59:14,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:14,733 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-12-18 20:59:14,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:14,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:14,939 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:14,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1737117148, now seen corresponding path program 2 times [2021-12-18 20:59:14,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:14,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476305694] [2021-12-18 20:59:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:14,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 13 proven. 137 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:59:15,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:15,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476305694] [2021-12-18 20:59:15,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476305694] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:15,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260396599] [2021-12-18 20:59:15,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:59:15,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:15,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:15,042 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:15,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 20:59:15,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:59:15,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:59:15,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 20:59:15,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:59:15,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:59:15,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260396599] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:15,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:15,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2021-12-18 20:59:15,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333421394] [2021-12-18 20:59:15,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:15,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 20:59:15,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:15,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 20:59:15,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-18 20:59:15,506 INFO L87 Difference]: Start difference. First operand 178 states and 198 transitions. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:15,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:15,804 INFO L93 Difference]: Finished difference Result 208 states and 228 transitions. [2021-12-18 20:59:15,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 20:59:15,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-18 20:59:15,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:15,805 INFO L225 Difference]: With dead ends: 208 [2021-12-18 20:59:15,805 INFO L226 Difference]: Without dead ends: 208 [2021-12-18 20:59:15,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 20:59:15,806 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 343 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:15,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 269 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:59:15,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-18 20:59:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 176. [2021-12-18 20:59:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.122093023255814) internal successors, (193), 175 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 193 transitions. [2021-12-18 20:59:15,811 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 193 transitions. Word has length 80 [2021-12-18 20:59:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:15,811 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 193 transitions. [2021-12-18 20:59:15,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:15,811 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 193 transitions. [2021-12-18 20:59:15,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-18 20:59:15,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:15,812 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:59:15,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:16,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:16,030 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:16,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:16,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1014039297, now seen corresponding path program 1 times [2021-12-18 20:59:16,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:16,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145672080] [2021-12-18 20:59:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:16,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 101 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 20:59:16,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:16,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145672080] [2021-12-18 20:59:16,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145672080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:16,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420448240] [2021-12-18 20:59:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:16,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:16,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:16,101 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:16,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 20:59:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:16,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 20:59:16,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 130 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 20:59:16,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 130 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 20:59:16,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420448240] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:16,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:16,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-18 20:59:16,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410795515] [2021-12-18 20:59:16,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:16,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 20:59:16,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:16,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 20:59:16,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-18 20:59:16,530 INFO L87 Difference]: Start difference. First operand 176 states and 193 transitions. Second operand has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:16,683 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2021-12-18 20:59:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 20:59:16,684 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-18 20:59:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:16,684 INFO L225 Difference]: With dead ends: 180 [2021-12-18 20:59:16,685 INFO L226 Difference]: Without dead ends: 180 [2021-12-18 20:59:16,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-12-18 20:59:16,685 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 73 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:16,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 307 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:59:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-18 20:59:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2021-12-18 20:59:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.1046511627906976) internal successors, (190), 175 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 190 transitions. [2021-12-18 20:59:16,688 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 190 transitions. Word has length 98 [2021-12-18 20:59:16,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:16,688 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 190 transitions. [2021-12-18 20:59:16,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 190 transitions. [2021-12-18 20:59:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-18 20:59:16,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:16,688 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:59:16,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:16,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 20:59:16,889 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:16,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:16,889 INFO L85 PathProgramCache]: Analyzing trace with hash -728466762, now seen corresponding path program 2 times [2021-12-18 20:59:16,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:16,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454208247] [2021-12-18 20:59:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:16,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-18 20:59:16,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:16,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454208247] [2021-12-18 20:59:16,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454208247] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:16,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914611615] [2021-12-18 20:59:16,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:59:16,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:16,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:16,954 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:16,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 20:59:17,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:59:17,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:59:17,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 20:59:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-18 20:59:17,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-18 20:59:17,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914611615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:17,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:17,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 18 [2021-12-18 20:59:17,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104777453] [2021-12-18 20:59:17,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:17,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 20:59:17,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 20:59:17,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-18 20:59:17,465 INFO L87 Difference]: Start difference. First operand 176 states and 190 transitions. Second operand has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:17,759 INFO L93 Difference]: Finished difference Result 201 states and 212 transitions. [2021-12-18 20:59:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 20:59:17,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 0 states have call successors, (0), 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 103 [2021-12-18 20:59:17,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:17,760 INFO L225 Difference]: With dead ends: 201 [2021-12-18 20:59:17,760 INFO L226 Difference]: Without dead ends: 201 [2021-12-18 20:59:17,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 20:59:17,761 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 408 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:17,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 360 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:59:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-18 20:59:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 188. [2021-12-18 20:59:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.0923913043478262) internal successors, (201), 187 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 201 transitions. [2021-12-18 20:59:17,763 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 201 transitions. Word has length 103 [2021-12-18 20:59:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:17,764 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 201 transitions. [2021-12-18 20:59:17,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:17,764 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 201 transitions. [2021-12-18 20:59:17,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-18 20:59:17,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:17,764 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1] [2021-12-18 20:59:17,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:17,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-18 20:59:17,965 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:17,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:17,965 INFO L85 PathProgramCache]: Analyzing trace with hash 141914171, now seen corresponding path program 3 times [2021-12-18 20:59:17,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:17,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107963632] [2021-12-18 20:59:17,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:17,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 152 proven. 201 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-18 20:59:18,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:18,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107963632] [2021-12-18 20:59:18,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107963632] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:18,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676907377] [2021-12-18 20:59:18,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:59:18,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:18,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:18,191 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:18,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 20:59:18,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-18 20:59:18,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:59:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 20:59:18,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:18,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:59:18,440 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 17 treesize of output 19 [2021-12-18 20:59:18,446 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:59:18,446 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 [2021-12-18 20:59:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 137 proven. 3 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-12-18 20:59:18,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 128 proven. 12 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-12-18 20:59:19,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676907377] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:19,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:19,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2021-12-18 20:59:19,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585405487] [2021-12-18 20:59:19,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:19,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 20:59:19,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:19,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 20:59:19,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-12-18 20:59:19,080 INFO L87 Difference]: Start difference. First operand 188 states and 201 transitions. Second operand has 24 states, 23 states have (on average 6.391304347826087) internal successors, (147), 24 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:20,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:20,123 INFO L93 Difference]: Finished difference Result 251 states and 271 transitions. [2021-12-18 20:59:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 20:59:20,123 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.391304347826087) internal successors, (147), 24 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-12-18 20:59:20,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:20,124 INFO L225 Difference]: With dead ends: 251 [2021-12-18 20:59:20,124 INFO L226 Difference]: Without dead ends: 251 [2021-12-18 20:59:20,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=643, Invalid=2327, Unknown=0, NotChecked=0, Total=2970 [2021-12-18 20:59:20,126 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 323 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:20,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 487 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 600 Invalid, 0 Unknown, 143 Unchecked, 0.3s Time] [2021-12-18 20:59:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-18 20:59:20,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 187. [2021-12-18 20:59:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 184 states have (on average 1.0815217391304348) internal successors, (199), 186 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 199 transitions. [2021-12-18 20:59:20,135 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 199 transitions. Word has length 118 [2021-12-18 20:59:20,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:20,135 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 199 transitions. [2021-12-18 20:59:20,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.391304347826087) internal successors, (147), 24 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 199 transitions. [2021-12-18 20:59:20,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-18 20:59:20,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:20,137 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1] [2021-12-18 20:59:20,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:20,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:20,353 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:20,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:20,354 INFO L85 PathProgramCache]: Analyzing trace with hash 104371967, now seen corresponding path program 2 times [2021-12-18 20:59:20,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:20,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341907693] [2021-12-18 20:59:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:20,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 159 proven. 194 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-18 20:59:20,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:20,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341907693] [2021-12-18 20:59:20,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341907693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:20,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976109202] [2021-12-18 20:59:20,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:59:20,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:20,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:20,470 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:20,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 20:59:20,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 20:59:20,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:59:20,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 20:59:20,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:20,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:59:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-12-18 20:59:20,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-12-18 20:59:21,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976109202] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:21,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:21,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 18 [2021-12-18 20:59:21,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930976901] [2021-12-18 20:59:21,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:21,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-18 20:59:21,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:21,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-18 20:59:21,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-12-18 20:59:21,281 INFO L87 Difference]: Start difference. First operand 187 states and 199 transitions. Second operand has 19 states, 18 states have (on average 8.555555555555555) internal successors, (154), 19 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:21,805 INFO L93 Difference]: Finished difference Result 234 states and 251 transitions. [2021-12-18 20:59:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 20:59:21,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 8.555555555555555) internal successors, (154), 19 states have internal predecessors, (154), 0 states have call successors, (0), 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 119 [2021-12-18 20:59:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:21,806 INFO L225 Difference]: With dead ends: 234 [2021-12-18 20:59:21,806 INFO L226 Difference]: Without dead ends: 234 [2021-12-18 20:59:21,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=410, Invalid=1150, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 20:59:21,807 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 98 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:21,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 314 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:59:21,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-18 20:59:21,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 182. [2021-12-18 20:59:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 180 states have (on average 1.0722222222222222) internal successors, (193), 181 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 193 transitions. [2021-12-18 20:59:21,810 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 193 transitions. Word has length 119 [2021-12-18 20:59:21,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:21,810 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 193 transitions. [2021-12-18 20:59:21,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 8.555555555555555) internal successors, (154), 19 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 193 transitions. [2021-12-18 20:59:21,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-18 20:59:21,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:21,810 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:59:21,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:22,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:22,019 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:22,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:22,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1334266660, now seen corresponding path program 3 times [2021-12-18 20:59:22,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:22,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504913010] [2021-12-18 20:59:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:22,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 290 proven. 176 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-18 20:59:22,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:22,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504913010] [2021-12-18 20:59:22,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504913010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:22,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809542074] [2021-12-18 20:59:22,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:59:22,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:22,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:22,146 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:22,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 20:59:22,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-18 20:59:22,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:59:22,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 20:59:22,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-12-18 20:59:22,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-12-18 20:59:22,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809542074] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:22,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:22,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2021-12-18 20:59:22,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617508705] [2021-12-18 20:59:22,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:22,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 20:59:22,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:22,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 20:59:22,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-12-18 20:59:22,665 INFO L87 Difference]: Start difference. First operand 182 states and 193 transitions. Second operand has 23 states, 23 states have (on average 8.434782608695652) internal successors, (194), 23 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:23,173 INFO L93 Difference]: Finished difference Result 267 states and 285 transitions. [2021-12-18 20:59:23,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 20:59:23,173 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 8.434782608695652) internal successors, (194), 23 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-12-18 20:59:23,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:23,174 INFO L225 Difference]: With dead ends: 267 [2021-12-18 20:59:23,174 INFO L226 Difference]: Without dead ends: 267 [2021-12-18 20:59:23,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=986, Invalid=2920, Unknown=0, NotChecked=0, Total=3906 [2021-12-18 20:59:23,175 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 786 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:23,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 315 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:59:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-18 20:59:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 258. [2021-12-18 20:59:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 256 states have (on average 1.08203125) internal successors, (277), 257 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 277 transitions. [2021-12-18 20:59:23,179 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 277 transitions. Word has length 145 [2021-12-18 20:59:23,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:23,179 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 277 transitions. [2021-12-18 20:59:23,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.434782608695652) internal successors, (194), 23 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 277 transitions. [2021-12-18 20:59:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-18 20:59:23,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:23,179 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 1, 1, 1] [2021-12-18 20:59:23,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:23,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:23,380 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:23,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:23,380 INFO L85 PathProgramCache]: Analyzing trace with hash -573618805, now seen corresponding path program 4 times [2021-12-18 20:59:23,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:23,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388295976] [2021-12-18 20:59:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:23,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 589 proven. 305 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-18 20:59:23,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:23,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388295976] [2021-12-18 20:59:23,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388295976] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:23,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864560845] [2021-12-18 20:59:23,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:59:23,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:23,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:23,560 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:23,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 20:59:25,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:59:25,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:59:25,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 20:59:25,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 692 proven. 31 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-12-18 20:59:25,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 692 proven. 31 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-12-18 20:59:25,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864560845] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:25,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:25,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2021-12-18 20:59:25,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462311983] [2021-12-18 20:59:25,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:25,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 20:59:25,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:25,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 20:59:25,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-12-18 20:59:25,663 INFO L87 Difference]: Start difference. First operand 258 states and 277 transitions. Second operand has 24 states, 24 states have (on average 7.583333333333333) internal successors, (182), 24 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:26,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:26,134 INFO L93 Difference]: Finished difference Result 279 states and 298 transitions. [2021-12-18 20:59:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 20:59:26,135 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.583333333333333) internal successors, (182), 24 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-12-18 20:59:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:26,136 INFO L225 Difference]: With dead ends: 279 [2021-12-18 20:59:26,136 INFO L226 Difference]: Without dead ends: 279 [2021-12-18 20:59:26,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 355 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=515, Invalid=1741, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 20:59:26,137 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 202 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:26,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 513 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:59:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-18 20:59:26,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 270. [2021-12-18 20:59:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 268 states have (on average 1.078358208955224) internal successors, (289), 269 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 289 transitions. [2021-12-18 20:59:26,141 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 289 transitions. Word has length 184 [2021-12-18 20:59:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:26,141 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 289 transitions. [2021-12-18 20:59:26,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.583333333333333) internal successors, (182), 24 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 289 transitions. [2021-12-18 20:59:26,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-18 20:59:26,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:26,143 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 1, 1, 1] [2021-12-18 20:59:26,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-18 20:59:26,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-18 20:59:26,347 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:26,348 INFO L85 PathProgramCache]: Analyzing trace with hash 170824235, now seen corresponding path program 5 times [2021-12-18 20:59:26,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:26,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857994059] [2021-12-18 20:59:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:26,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 670 proven. 334 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-18 20:59:26,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:26,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857994059] [2021-12-18 20:59:26,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857994059] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:26,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313295720] [2021-12-18 20:59:26,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:59:26,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:26,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:26,500 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:26,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 20:59:27,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-18 20:59:27,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:59:27,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 20:59:27,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 727 proven. 277 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-18 20:59:28,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 740 proven. 264 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-18 20:59:28,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313295720] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:28,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:28,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2021-12-18 20:59:28,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684465266] [2021-12-18 20:59:28,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:28,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 20:59:28,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:28,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 20:59:28,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-12-18 20:59:28,352 INFO L87 Difference]: Start difference. First operand 270 states and 289 transitions. Second operand has 21 states, 21 states have (on average 8.095238095238095) internal successors, (170), 21 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:28,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:28,763 INFO L93 Difference]: Finished difference Result 279 states and 297 transitions. [2021-12-18 20:59:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 20:59:28,764 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.095238095238095) internal successors, (170), 21 states have internal predecessors, (170), 0 states have call successors, (0), 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 192 [2021-12-18 20:59:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:28,765 INFO L225 Difference]: With dead ends: 279 [2021-12-18 20:59:28,765 INFO L226 Difference]: Without dead ends: 279 [2021-12-18 20:59:28,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 384 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=485, Invalid=1321, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 20:59:28,766 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 133 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:28,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 453 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:59:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-18 20:59:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 275. [2021-12-18 20:59:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 273 states have (on average 1.0732600732600732) internal successors, (293), 274 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 293 transitions. [2021-12-18 20:59:28,770 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 293 transitions. Word has length 192 [2021-12-18 20:59:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:28,770 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 293 transitions. [2021-12-18 20:59:28,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.095238095238095) internal successors, (170), 21 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:28,771 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 293 transitions. [2021-12-18 20:59:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-18 20:59:28,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:28,772 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 1, 1, 1] [2021-12-18 20:59:28,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:28,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-18 20:59:28,991 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:28,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:28,992 INFO L85 PathProgramCache]: Analyzing trace with hash 961774662, now seen corresponding path program 6 times [2021-12-18 20:59:28,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:28,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534113212] [2021-12-18 20:59:28,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:28,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 470 proven. 583 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-18 20:59:29,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:29,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534113212] [2021-12-18 20:59:29,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534113212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:29,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393161829] [2021-12-18 20:59:29,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:59:29,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:29,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:29,164 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:29,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 20:59:29,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-18 20:59:29,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:59:29,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 20:59:29,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 651 proven. 225 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-18 20:59:29,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 664 proven. 212 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-18 20:59:30,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393161829] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:30,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:30,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2021-12-18 20:59:30,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505806491] [2021-12-18 20:59:30,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:30,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 20:59:30,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:30,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 20:59:30,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 20:59:30,160 INFO L87 Difference]: Start difference. First operand 275 states and 293 transitions. Second operand has 34 states, 34 states have (on average 6.5588235294117645) internal successors, (223), 34 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:30,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:30,941 INFO L93 Difference]: Finished difference Result 457 states and 486 transitions. [2021-12-18 20:59:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-18 20:59:30,941 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.5588235294117645) internal successors, (223), 34 states have internal predecessors, (223), 0 states have call successors, (0), 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 197 [2021-12-18 20:59:30,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:30,943 INFO L225 Difference]: With dead ends: 457 [2021-12-18 20:59:30,943 INFO L226 Difference]: Without dead ends: 457 [2021-12-18 20:59:30,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 373 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1123, Invalid=4133, Unknown=0, NotChecked=0, Total=5256 [2021-12-18 20:59:30,944 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 261 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:30,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 402 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:59:30,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-12-18 20:59:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 396. [2021-12-18 20:59:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 394 states have (on average 1.0685279187817258) internal successors, (421), 395 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 421 transitions. [2021-12-18 20:59:30,949 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 421 transitions. Word has length 197 [2021-12-18 20:59:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:30,949 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 421 transitions. [2021-12-18 20:59:30,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.5588235294117645) internal successors, (223), 34 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:59:30,950 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 421 transitions. [2021-12-18 20:59:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-18 20:59:30,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:30,951 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 1, 1, 1] [2021-12-18 20:59:30,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:31,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-18 20:59:31,163 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 20:59:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash 309236233, now seen corresponding path program 7 times [2021-12-18 20:59:31,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:31,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451733355] [2021-12-18 20:59:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:31,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 1115 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-18 20:59:31,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:31,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451733355] [2021-12-18 20:59:31,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451733355] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:31,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22081317] [2021-12-18 20:59:31,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:59:31,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:31,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:31,843 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:31,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 20:59:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:32,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-18 20:59:32,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:32,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:59:32,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:59:32,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:59:32,102 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 [2021-12-18 20:59:32,108 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:59:32,108 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 [2021-12-18 20:59:32,250 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:59:32,251 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 [2021-12-18 20:59:32,262 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:59:32,262 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 [2021-12-18 20:59:32,486 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:59:32,486 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 [2021-12-18 20:59:32,493 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 [2021-12-18 20:59:32,697 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:59:32,697 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 [2021-12-18 20:59:32,708 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:59:32,708 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 [2021-12-18 20:59:32,932 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:59:32,932 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 [2021-12-18 20:59:32,944 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:59:32,944 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 [2021-12-18 20:59:33,194 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:59:33,194 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 [2021-12-18 20:59:33,215 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:59:33,215 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 [2021-12-18 20:59:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 1070 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-18 20:59:33,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:33,820 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 20:59:33,821 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 13 treesize of output 12 [2021-12-18 20:59:34,709 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 20:59:34,710 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 13 treesize of output 12 [2021-12-18 20:59:36,620 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 20:59:36,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-18 20:59:39,190 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 20:59:39,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-18 20:59:41,656 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 20:59:41,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-18 20:59:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 1068 refuted. 2 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-18 20:59:44,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22081317] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:59:44,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:59:44,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 16] total 57 [2021-12-18 20:59:44,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072586741] [2021-12-18 20:59:44,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:44,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-18 20:59:44,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:44,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-18 20:59:44,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=2877, Unknown=11, NotChecked=0, Total=3306 [2021-12-18 20:59:44,536 INFO L87 Difference]: Start difference. First operand 396 states and 421 transitions. Second operand has 58 states, 57 states have (on average 6.087719298245614) internal successors, (347), 58 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:00:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:00:10,668 INFO L93 Difference]: Finished difference Result 1998 states and 2151 transitions. [2021-12-18 21:00:10,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-18 21:00:10,668 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 6.087719298245614) internal successors, (347), 58 states have internal predecessors, (347), 0 states have call successors, (0), 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 201 [2021-12-18 21:00:10,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:00:10,672 INFO L225 Difference]: With dead ends: 1998 [2021-12-18 21:00:10,672 INFO L226 Difference]: Without dead ends: 1998 [2021-12-18 21:00:10,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 381 SyntacticMatches, 15 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=1989, Invalid=10204, Unknown=17, NotChecked=0, Total=12210 [2021-12-18 21:00:10,675 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 443 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 2041 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 687 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:00:10,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 2041 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 881 Invalid, 0 Unknown, 687 Unchecked, 0.3s Time] [2021-12-18 21:00:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-12-18 21:00:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1922. [2021-12-18 21:00:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1920 states have (on average 1.0791666666666666) internal successors, (2072), 1921 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:00:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 2072 transitions. [2021-12-18 21:00:10,692 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 2072 transitions. Word has length 201 [2021-12-18 21:00:10,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:00:10,692 INFO L470 AbstractCegarLoop]: Abstraction has 1922 states and 2072 transitions. [2021-12-18 21:00:10,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 6.087719298245614) internal successors, (347), 58 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:00:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 2072 transitions. [2021-12-18 21:00:10,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-18 21:00:10,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:00:10,694 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 1, 1, 1] [2021-12-18 21:00:10,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-18 21:00:10,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:00:10,911 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:00:10,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:00:10,912 INFO L85 PathProgramCache]: Analyzing trace with hash 246654409, now seen corresponding path program 8 times [2021-12-18 21:00:10,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:00:10,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515940817] [2021-12-18 21:00:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:00:10,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:00:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:00:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 1115 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-18 21:00:11,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:00:11,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515940817] [2021-12-18 21:00:11,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515940817] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:00:11,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775433294] [2021-12-18 21:00:11,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:00:11,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:00:11,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:00:11,540 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 21:00:11,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-18 21:00:11,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:00:11,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:00:11,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-18 21:00:11,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:00:11,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:00:11,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:00:11,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:00:11,792 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 [2021-12-18 21:00:11,797 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:00:11,797 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 [2021-12-18 21:00:11,906 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:00:11,906 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 [2021-12-18 21:00:11,919 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:00:11,920 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 [2021-12-18 21:00:12,160 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:00:12,161 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 [2021-12-18 21:00:12,173 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:00:12,173 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 [2021-12-18 21:00:12,447 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:00:12,447 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 [2021-12-18 21:00:12,461 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:00:12,461 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 [2021-12-18 21:00:12,812 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:00:12,812 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 [2021-12-18 21:00:12,816 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 [2021-12-18 21:00:13,138 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:00:13,139 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 [2021-12-18 21:00:13,149 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:00:13,150 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 [2021-12-18 21:00:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 1070 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-18 21:00:13,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:00:13,796 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:00:13,796 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 13 treesize of output 12 [2021-12-18 21:00:14,953 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:00:14,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-18 21:00:18,477 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:00:18,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-18 21:00:21,849 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:00:21,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-18 21:00:25,648 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:00:25,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-18 21:00:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 1068 refuted. 2 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-18 21:00:29,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775433294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:00:29,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:00:29,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 17] total 56 [2021-12-18 21:00:29,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547715282] [2021-12-18 21:00:29,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:00:29,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-18 21:00:29,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:00:29,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-18 21:00:29,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=2766, Unknown=10, NotChecked=0, Total=3192 [2021-12-18 21:00:29,747 INFO L87 Difference]: Start difference. First operand 1922 states and 2072 transitions. Second operand has 57 states, 56 states have (on average 6.196428571428571) internal successors, (347), 57 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:00:57,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:00:57,710 INFO L93 Difference]: Finished difference Result 3072 states and 3319 transitions. [2021-12-18 21:00:57,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-18 21:00:57,711 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 6.196428571428571) internal successors, (347), 57 states have internal predecessors, (347), 0 states have call successors, (0), 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 201 [2021-12-18 21:00:57,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:00:57,717 INFO L225 Difference]: With dead ends: 3072 [2021-12-18 21:00:57,717 INFO L226 Difference]: Without dead ends: 3072 [2021-12-18 21:00:57,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 385 SyntacticMatches, 18 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=1537, Invalid=7952, Unknown=17, NotChecked=0, Total=9506 [2021-12-18 21:00:57,720 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 511 mSDsluCounter, 2305 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 2398 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 701 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:00:57,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 2398 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1047 Invalid, 0 Unknown, 701 Unchecked, 0.4s Time] [2021-12-18 21:00:57,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-12-18 21:00:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2680. [2021-12-18 21:00:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2678 states have (on average 1.0814040328603436) internal successors, (2896), 2679 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:00:57,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 2896 transitions. [2021-12-18 21:00:57,744 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 2896 transitions. Word has length 201 [2021-12-18 21:00:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:00:57,744 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 2896 transitions. [2021-12-18 21:00:57,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 6.196428571428571) internal successors, (347), 57 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:00:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 2896 transitions. [2021-12-18 21:00:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-18 21:00:57,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:00:57,746 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1] [2021-12-18 21:00:57,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-18 21:00:57,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-18 21:00:57,959 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:00:57,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:00:57,960 INFO L85 PathProgramCache]: Analyzing trace with hash 246656331, now seen corresponding path program 9 times [2021-12-18 21:00:57,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:00:57,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051529825] [2021-12-18 21:00:57,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:00:57,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:00:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:00:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 1115 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-18 21:00:58,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:00:58,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051529825] [2021-12-18 21:00:58,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051529825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:00:58,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928348379] [2021-12-18 21:00:58,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:00:58,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:00:58,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:00:58,608 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 21:00:58,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-18 21:00:58,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-18 21:00:58,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:00:58,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-18 21:00:58,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:00:58,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:00:58,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:00:58,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:00:58,990 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 [2021-12-18 21:00:58,995 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:00:58,995 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 [2021-12-18 21:00:59,101 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:00:59,101 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 [2021-12-18 21:00:59,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:00:59,296 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:00:59,296 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 [2021-12-18 21:00:59,335 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:00:59,335 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 [2021-12-18 21:00:59,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:00:59,743 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-18 21:00:59,743 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 16 treesize of output 18 [2021-12-18 21:00:59,748 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 [2021-12-18 21:01:00,066 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:01:00,066 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 [2021-12-18 21:01:00,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:01:00,636 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-18 21:01:00,636 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 16 treesize of output 18 [2021-12-18 21:01:00,642 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 [2021-12-18 21:01:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 1075 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-12-18 21:01:01,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:01:02,060 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:01:02,060 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 25 treesize of output 24 [2021-12-18 21:01:08,815 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:01:08,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-18 21:01:13,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 21:01:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 5 proven. 1070 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-12-18 21:01:18,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928348379] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:01:18,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:01:18,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 20] total 63 [2021-12-18 21:01:18,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349400805] [2021-12-18 21:01:18,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:01:18,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-18 21:01:18,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:01:18,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-18 21:01:18,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=3382, Unknown=0, NotChecked=0, Total=4032 [2021-12-18 21:01:18,033 INFO L87 Difference]: Start difference. First operand 2680 states and 2896 transitions. Second operand has 64 states, 63 states have (on average 5.5396825396825395) internal successors, (349), 64 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:01:24,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:01:24,819 INFO L93 Difference]: Finished difference Result 4142 states and 4477 transitions. [2021-12-18 21:01:24,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-18 21:01:24,820 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 5.5396825396825395) internal successors, (349), 64 states have internal predecessors, (349), 0 states have call successors, (0), 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 201 [2021-12-18 21:01:24,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:01:24,828 INFO L225 Difference]: With dead ends: 4142 [2021-12-18 21:01:24,828 INFO L226 Difference]: Without dead ends: 4142 [2021-12-18 21:01:24,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 389 SyntacticMatches, 35 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4493 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=2872, Invalid=12380, Unknown=0, NotChecked=0, Total=15252 [2021-12-18 21:01:24,829 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 973 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 606 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:01:24,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 1203 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 857 Invalid, 0 Unknown, 606 Unchecked, 0.3s Time] [2021-12-18 21:01:24,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2021-12-18 21:01:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 4114. [2021-12-18 21:01:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4114 states, 4112 states have (on average 1.0809824902723735) internal successors, (4445), 4113 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:01:24,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 4445 transitions. [2021-12-18 21:01:24,864 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 4445 transitions. Word has length 201 [2021-12-18 21:01:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:01:24,865 INFO L470 AbstractCegarLoop]: Abstraction has 4114 states and 4445 transitions. [2021-12-18 21:01:24,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 5.5396825396825395) internal successors, (349), 64 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:01:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 4445 transitions. [2021-12-18 21:01:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-18 21:01:24,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:01:24,867 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 1, 1, 1] [2021-12-18 21:01:24,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-18 21:01:25,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-18 21:01:25,087 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 21:01:25,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:01:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash 647525705, now seen corresponding path program 10 times [2021-12-18 21:01:25,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:01:25,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087170769] [2021-12-18 21:01:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:01:25,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:01:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:01:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 1115 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-18 21:01:25,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:01:25,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087170769] [2021-12-18 21:01:25,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087170769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:01:25,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089543507] [2021-12-18 21:01:25,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 21:01:25,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:01:25,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:01:25,755 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 21:01:25,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-18 21:01:26,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 21:01:26,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:01:27,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 154 conjunts are in the unsatisfiable core [2021-12-18 21:01:27,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:01:27,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 21:01:27,261 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:01:27,261 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-18 21:01:27,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 21:01:27,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:01:27,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:01:27,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-18 21:01:27,600 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:01:27,600 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 [2021-12-18 21:01:27,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:01:27,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:01:27,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:01:27,909 INFO L354 Elim1Store]: treesize reduction 74, result has 53.5 percent of original size [2021-12-18 21:01:27,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 5 case distinctions, treesize of input 46 treesize of output 105 [2021-12-18 21:01:28,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-12-18 21:01:28,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:01:28,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:01:28,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:01:28,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:01:28,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:01:28,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:01:28,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:01:28,483 INFO L354 Elim1Store]: treesize reduction 67, result has 23.0 percent of original size [2021-12-18 21:01:28,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 67 treesize of output 74 [2021-12-18 21:01:30,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 21:01:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 507 proven. 67 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2021-12-18 21:01:30,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:01:31,219 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:01:31,220 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 25 treesize of output 24 [2021-12-18 21:01:48,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 21:01:57,073 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_foo_~#a~0#1.base| Int)) (or (= |c_ULTIMATE.start_main_~#b~0#1.base| |ULTIMATE.start_foo_~#a~0#1.base|) (forall ((|v_ULTIMATE.start_foo_~i~1#1_289| Int) (|ULTIMATE.start_bar_~i~0#1| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_187| Int) (v_ArrVal_1962 Int) (v_ArrVal_1959 (Array Int Int)) (v_ArrVal_1964 Int) (v_ArrVal_1966 Int)) (let ((.cse7 (store |c_#memory_int| |ULTIMATE.start_foo_~#a~0#1.base| v_ArrVal_1959))) (let ((.cse6 (store (select .cse7 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~2#1| 4)) v_ArrVal_1962))) (let ((.cse0 (store .cse7 |c_ULTIMATE.start_main_~#b~0#1.base| .cse6)) (.cse2 (* |v_ULTIMATE.start_foo_~i~1#1_289| 4))) (let ((.cse1 (store (select .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_187|) .cse2 v_ArrVal_1964)) (.cse3 (+ |v_ULTIMATE.start_foo_~i~1#1_289| 1))) (or (< v_ArrVal_1966 (select (select (store .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_187| .cse1) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2 4))) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_187|) (< v_ArrVal_1962 (+ |c_ULTIMATE.start_foo_~i~1#1| 1)) (<= .cse3 |ULTIMATE.start_bar_~i~0#1|) (< 0 (let ((.cse4 (store .cse1 (+ .cse2 4) v_ArrVal_1966)) (.cse5 (* |ULTIMATE.start_bar_~i~0#1| 4))) (+ (select .cse4 .cse5) (select .cse4 (+ .cse5 4))))) (< |v_ULTIMATE.start_foo_~i~1#1_289| 0) (<= (+ |ULTIMATE.start_bar_~i~0#1| 1) |v_ULTIMATE.start_foo_~i~1#1_289|) (< v_ArrVal_1964 (select .cse6 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2))) (< |c_ULTIMATE.start_main_~i~2#1| .cse3))))))))) is different from false [2021-12-18 21:01:57,859 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_foo_~#a~0#1.base| Int) (|v_ULTIMATE.start_foo_~i~1#1_289| Int) (|ULTIMATE.start_bar_~i~0#1| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_187| Int) (v_ArrVal_1962 Int) (v_ArrVal_1959 (Array Int Int)) (v_ArrVal_1964 Int) (v_ArrVal_1966 Int)) (let ((.cse7 (store |c_#memory_int| |ULTIMATE.start_foo_~#a~0#1.base| v_ArrVal_1959))) (let ((.cse6 (store (select .cse7 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~2#1| 4)) v_ArrVal_1962))) (let ((.cse0 (store .cse7 |c_ULTIMATE.start_main_~#b~0#1.base| .cse6)) (.cse2 (* |v_ULTIMATE.start_foo_~i~1#1_289| 4))) (let ((.cse1 (store (select .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_187|) .cse2 v_ArrVal_1964)) (.cse3 (+ |v_ULTIMATE.start_foo_~i~1#1_289| 1))) (or (= |c_ULTIMATE.start_main_~#b~0#1.base| |ULTIMATE.start_foo_~#a~0#1.base|) (< v_ArrVal_1966 (select (select (store .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_187| .cse1) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2 4))) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_187|) (<= .cse3 |ULTIMATE.start_bar_~i~0#1|) (< 0 (let ((.cse4 (store .cse1 (+ .cse2 4) v_ArrVal_1966)) (.cse5 (* |ULTIMATE.start_bar_~i~0#1| 4))) (+ (select .cse4 .cse5) (select .cse4 (+ .cse5 4))))) (< |v_ULTIMATE.start_foo_~i~1#1_289| 0) (< v_ArrVal_1964 (select .cse6 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2))) (<= (+ |ULTIMATE.start_bar_~i~0#1| 1) |v_ULTIMATE.start_foo_~i~1#1_289|) (< v_ArrVal_1962 1) (< |c_ULTIMATE.start_main_~i~2#1| .cse3))))))) is different from false [2021-12-18 21:01:58,041 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_foo_~#a~0#1.base| Int) (|v_ULTIMATE.start_foo_~i~1#1_289| Int) (|ULTIMATE.start_bar_~i~0#1| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_187| Int) (v_ArrVal_1962 Int) (v_ArrVal_1959 (Array Int Int)) (v_ArrVal_1964 Int) (v_ArrVal_1966 Int)) (let ((.cse6 (store |c_#memory_int| |ULTIMATE.start_foo_~#a~0#1.base| v_ArrVal_1959))) (let ((.cse0 (store (select .cse6 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~2#1| 4) 4) v_ArrVal_1962))) (let ((.cse5 (store .cse6 |c_ULTIMATE.start_main_~#b~0#1.base| .cse0)) (.cse1 (* |v_ULTIMATE.start_foo_~i~1#1_289| 4))) (let ((.cse4 (store (select .cse5 |v_ULTIMATE.start_foo_~#a~0#1.base_187|) .cse1 v_ArrVal_1964))) (or (= |c_ULTIMATE.start_main_~#b~0#1.base| |ULTIMATE.start_foo_~#a~0#1.base|) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_187|) (<= (+ |v_ULTIMATE.start_foo_~i~1#1_289| 1) |ULTIMATE.start_bar_~i~0#1|) (< v_ArrVal_1964 (select .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse1))) (< |v_ULTIMATE.start_foo_~i~1#1_289| 0) (<= (+ |ULTIMATE.start_bar_~i~0#1| 1) |v_ULTIMATE.start_foo_~i~1#1_289|) (< 0 (let ((.cse2 (store .cse4 (+ .cse1 4) v_ArrVal_1966)) (.cse3 (* |ULTIMATE.start_bar_~i~0#1| 4))) (+ (select .cse2 .cse3) (select .cse2 (+ .cse3 4))))) (< v_ArrVal_1962 1) (< |c_ULTIMATE.start_main_~i~2#1| |v_ULTIMATE.start_foo_~i~1#1_289|) (< v_ArrVal_1966 (select (select (store .cse5 |v_ULTIMATE.start_foo_~#a~0#1.base_187| .cse4) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse1 4))))))))) is different from false [2021-12-18 21:01:58,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:01:58,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 272 treesize of output 176 [2021-12-18 21:01:58,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:01:58,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:01:58,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 159 [2021-12-18 21:01:58,311 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-12-18 21:01:58,311 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 144 treesize of output 144 [2021-12-18 21:01:58,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:01:58,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:01:58,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:01:58,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:01:58,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:01:58,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:01:58,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:01:58,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:01:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 567 proven. 377 refuted. 1 times theorem prover too weak. 306 trivial. 29 not checked. [2021-12-18 21:01:58,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089543507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:01:58,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:01:58,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 35, 50] total 107 [2021-12-18 21:01:58,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102821946] [2021-12-18 21:01:58,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:01:58,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-18 21:01:58,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:01:58,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-18 21:01:58,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=10207, Unknown=15, NotChecked=618, Total=11342 [2021-12-18 21:01:58,836 INFO L87 Difference]: Start difference. First operand 4114 states and 4445 transitions. Second operand has 107 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:02:01,416 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_bar_~i~0#1| 1)) (.cse9 (+ |c_ULTIMATE.start_bar_~i~0#1| 3)) (.cse1 (+ |c_ULTIMATE.start_bar_~i~0#1| 2))) (and (or (< .cse0 |c_ULTIMATE.start_bar_~size#1|) (<= |c_ULTIMATE.start_bar_~size#1| |c_ULTIMATE.start_bar_~i~0#1|)) (= (select |c_#length| |c_ULTIMATE.start_main_~#b~0#1.base|) 400) (or (< .cse1 |c_ULTIMATE.start_bar_~size#1|) (<= |c_ULTIMATE.start_bar_~size#1| .cse0)) (or (< 4 |c_ULTIMATE.start_foo_~size#1|) (<= |c_ULTIMATE.start_foo_~size#1| 3)) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (= 0 |c_ULTIMATE.start_main_~#b~0#1.offset|) (<= 0 |c_ULTIMATE.start_main_#t~ret6#1|) (forall ((|ULTIMATE.start_foo_~#a~0#1.base| Int) (|v_ULTIMATE.start_foo_~i~1#1_289| Int) (|ULTIMATE.start_bar_~i~0#1| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_187| Int) (v_ArrVal_1962 Int) (v_ArrVal_1959 (Array Int Int)) (v_ArrVal_1964 Int) (v_ArrVal_1966 Int)) (let ((.cse8 (store |c_#memory_int| |ULTIMATE.start_foo_~#a~0#1.base| v_ArrVal_1959))) (let ((.cse2 (store (select .cse8 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~2#1| 4) 4) v_ArrVal_1962))) (let ((.cse7 (store .cse8 |c_ULTIMATE.start_main_~#b~0#1.base| .cse2)) (.cse3 (* |v_ULTIMATE.start_foo_~i~1#1_289| 4))) (let ((.cse6 (store (select .cse7 |v_ULTIMATE.start_foo_~#a~0#1.base_187|) .cse3 v_ArrVal_1964))) (or (= |c_ULTIMATE.start_main_~#b~0#1.base| |ULTIMATE.start_foo_~#a~0#1.base|) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_187|) (<= (+ |v_ULTIMATE.start_foo_~i~1#1_289| 1) |ULTIMATE.start_bar_~i~0#1|) (< v_ArrVal_1964 (select .cse2 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse3))) (< |v_ULTIMATE.start_foo_~i~1#1_289| 0) (<= (+ |ULTIMATE.start_bar_~i~0#1| 1) |v_ULTIMATE.start_foo_~i~1#1_289|) (< 0 (let ((.cse4 (store .cse6 (+ .cse3 4) v_ArrVal_1966)) (.cse5 (* |ULTIMATE.start_bar_~i~0#1| 4))) (+ (select .cse4 .cse5) (select .cse4 (+ .cse5 4))))) (< v_ArrVal_1962 1) (< |c_ULTIMATE.start_main_~i~2#1| |v_ULTIMATE.start_foo_~i~1#1_289|) (< v_ArrVal_1966 (select (select (store .cse7 |v_ULTIMATE.start_foo_~#a~0#1.base_187| .cse6) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse3 4))))))))) (= |c_ULTIMATE.start_main_~i~2#1| 0) (<= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~2#1| 4)))) (or (< (+ |c_ULTIMATE.start_bar_~i~0#1| 4) |c_ULTIMATE.start_bar_~size#1|) (<= |c_ULTIMATE.start_bar_~size#1| .cse9)) (or (< .cse9 |c_ULTIMATE.start_bar_~size#1|) (<= |c_ULTIMATE.start_bar_~size#1| .cse1)))) is different from false [2021-12-18 21:02:01,421 WARN L838 $PredicateComparison]: unable to prove that (and (= (select |c_#length| |c_ULTIMATE.start_main_~#b~0#1.base|) 400) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (= 0 |c_ULTIMATE.start_main_~#b~0#1.offset|) (forall ((|ULTIMATE.start_foo_~#a~0#1.base| Int) (|v_ULTIMATE.start_foo_~i~1#1_289| Int) (|ULTIMATE.start_bar_~i~0#1| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_187| Int) (v_ArrVal_1962 Int) (v_ArrVal_1959 (Array Int Int)) (v_ArrVal_1964 Int) (v_ArrVal_1966 Int)) (let ((.cse6 (store |c_#memory_int| |ULTIMATE.start_foo_~#a~0#1.base| v_ArrVal_1959))) (let ((.cse0 (store (select .cse6 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~2#1| 4) 4) v_ArrVal_1962))) (let ((.cse5 (store .cse6 |c_ULTIMATE.start_main_~#b~0#1.base| .cse0)) (.cse1 (* |v_ULTIMATE.start_foo_~i~1#1_289| 4))) (let ((.cse4 (store (select .cse5 |v_ULTIMATE.start_foo_~#a~0#1.base_187|) .cse1 v_ArrVal_1964))) (or (= |c_ULTIMATE.start_main_~#b~0#1.base| |ULTIMATE.start_foo_~#a~0#1.base|) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_187|) (<= (+ |v_ULTIMATE.start_foo_~i~1#1_289| 1) |ULTIMATE.start_bar_~i~0#1|) (< v_ArrVal_1964 (select .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse1))) (< |v_ULTIMATE.start_foo_~i~1#1_289| 0) (<= (+ |ULTIMATE.start_bar_~i~0#1| 1) |v_ULTIMATE.start_foo_~i~1#1_289|) (< 0 (let ((.cse2 (store .cse4 (+ .cse1 4) v_ArrVal_1966)) (.cse3 (* |ULTIMATE.start_bar_~i~0#1| 4))) (+ (select .cse2 .cse3) (select .cse2 (+ .cse3 4))))) (< v_ArrVal_1962 1) (< |c_ULTIMATE.start_main_~i~2#1| |v_ULTIMATE.start_foo_~i~1#1_289|) (< v_ArrVal_1966 (select (select (store .cse5 |v_ULTIMATE.start_foo_~#a~0#1.base_187| .cse4) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse1 4))))))))) (= |c_ULTIMATE.start_main_~i~2#1| 0) (<= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~2#1| 4))))) is different from false [2021-12-18 21:02:01,426 WARN L838 $PredicateComparison]: unable to prove that (and (<= 1 |c_ULTIMATE.start_main_~i~2#1|) (= (select |c_#length| |c_ULTIMATE.start_main_~#b~0#1.base|) 400) (<= |c_ULTIMATE.start_main_~i~2#1| 1) (<= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) |c_ULTIMATE.start_main_~#b~0#1.offset|)) (= |c_ULTIMATE.start_main_~i~2#1| 1) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (= 0 |c_ULTIMATE.start_main_~#b~0#1.offset|) (forall ((|ULTIMATE.start_foo_~#a~0#1.base| Int) (|v_ULTIMATE.start_foo_~i~1#1_289| Int) (|ULTIMATE.start_bar_~i~0#1| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_187| Int) (v_ArrVal_1962 Int) (v_ArrVal_1959 (Array Int Int)) (v_ArrVal_1964 Int) (v_ArrVal_1966 Int)) (let ((.cse7 (store |c_#memory_int| |ULTIMATE.start_foo_~#a~0#1.base| v_ArrVal_1959))) (let ((.cse6 (store (select .cse7 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~2#1| 4)) v_ArrVal_1962))) (let ((.cse0 (store .cse7 |c_ULTIMATE.start_main_~#b~0#1.base| .cse6)) (.cse2 (* |v_ULTIMATE.start_foo_~i~1#1_289| 4))) (let ((.cse1 (store (select .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_187|) .cse2 v_ArrVal_1964)) (.cse3 (+ |v_ULTIMATE.start_foo_~i~1#1_289| 1))) (or (= |c_ULTIMATE.start_main_~#b~0#1.base| |ULTIMATE.start_foo_~#a~0#1.base|) (< v_ArrVal_1966 (select (select (store .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_187| .cse1) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2 4))) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_187|) (<= .cse3 |ULTIMATE.start_bar_~i~0#1|) (< 0 (let ((.cse4 (store .cse1 (+ .cse2 4) v_ArrVal_1966)) (.cse5 (* |ULTIMATE.start_bar_~i~0#1| 4))) (+ (select .cse4 .cse5) (select .cse4 (+ .cse5 4))))) (< |v_ULTIMATE.start_foo_~i~1#1_289| 0) (< v_ArrVal_1964 (select .cse6 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2))) (<= (+ |ULTIMATE.start_bar_~i~0#1| 1) |v_ULTIMATE.start_foo_~i~1#1_289|) (< v_ArrVal_1962 1) (< |c_ULTIMATE.start_main_~i~2#1| .cse3)))))))) is different from false [2021-12-18 21:02:01,431 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select |c_#length| |c_ULTIMATE.start_main_~#b~0#1.base|) 400)) (.cse1 (= |c_ULTIMATE.start_main_~#b~0#1.base| |c_ULTIMATE.start_foo_~#a~0#1.base|))) (and (<= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) |c_ULTIMATE.start_main_~#b~0#1.offset|)) (= |c_ULTIMATE.start_main_~i~2#1| 1) (or (not .cse0) (and (<= 1 |c_ULTIMATE.start_main_~i~2#1|) (<= |c_ULTIMATE.start_main_~i~2#1| 1) (= |c_ULTIMATE.start_foo_~b#1.base| |c_ULTIMATE.start_main_~#b~0#1.base|))) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (= 0 |c_ULTIMATE.start_main_~#b~0#1.offset|) (<= 0 |c_ULTIMATE.start_foo_~i~1#1|) (or .cse0 .cse1) (or .cse1 (forall ((|ULTIMATE.start_bar_~i~0#1| Int) (v_ArrVal_1964 Int) (v_ArrVal_1966 Int)) (let ((.cse5 (* |c_ULTIMATE.start_foo_~i~1#1| 4))) (let ((.cse4 (store (select |c_#memory_int| |c_ULTIMATE.start_foo_~#a~0#1.base|) (+ |c_ULTIMATE.start_foo_~#a~0#1.offset| .cse5) v_ArrVal_1964))) (or (< 0 (let ((.cse2 (store .cse4 (+ |c_ULTIMATE.start_foo_~#a~0#1.offset| .cse5 4) v_ArrVal_1966)) (.cse3 (* |ULTIMATE.start_bar_~i~0#1| 4))) (+ (select .cse2 (+ |c_ULTIMATE.start_foo_~#a~0#1.offset| .cse3)) (select .cse2 (+ |c_ULTIMATE.start_foo_~#a~0#1.offset| .cse3 4))))) (<= (+ |c_ULTIMATE.start_foo_~i~1#1| 1) |ULTIMATE.start_bar_~i~0#1|) (< v_ArrVal_1966 (select (select (store |c_#memory_int| |c_ULTIMATE.start_foo_~#a~0#1.base| .cse4) |c_ULTIMATE.start_foo_~b#1.base|) (+ |c_ULTIMATE.start_foo_~b#1.offset| .cse5 4))) (<= (+ |ULTIMATE.start_bar_~i~0#1| 1) |c_ULTIMATE.start_foo_~i~1#1|) (< v_ArrVal_1964 (select (select |c_#memory_int| |c_ULTIMATE.start_foo_~b#1.base|) (+ |c_ULTIMATE.start_foo_~b#1.offset| .cse5))))))) (< (select |c_#length| |c_ULTIMATE.start_foo_~#a~0#1.base|) (+ |c_ULTIMATE.start_foo_~#a~0#1.offset| (* 4 |c_ULTIMATE.start_foo_~i~1#1|) 8))) (forall ((|ULTIMATE.start_foo_~#a~0#1.base| Int)) (or (= |c_ULTIMATE.start_main_~#b~0#1.base| |ULTIMATE.start_foo_~#a~0#1.base|) (forall ((|v_ULTIMATE.start_foo_~i~1#1_289| Int) (|ULTIMATE.start_bar_~i~0#1| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_187| Int) (v_ArrVal_1962 Int) (v_ArrVal_1959 (Array Int Int)) (v_ArrVal_1964 Int) (v_ArrVal_1966 Int)) (let ((.cse13 (store |c_#memory_int| |ULTIMATE.start_foo_~#a~0#1.base| v_ArrVal_1959))) (let ((.cse12 (store (select .cse13 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~2#1| 4)) v_ArrVal_1962))) (let ((.cse6 (store .cse13 |c_ULTIMATE.start_main_~#b~0#1.base| .cse12)) (.cse8 (* |v_ULTIMATE.start_foo_~i~1#1_289| 4))) (let ((.cse7 (store (select .cse6 |v_ULTIMATE.start_foo_~#a~0#1.base_187|) .cse8 v_ArrVal_1964)) (.cse9 (+ |v_ULTIMATE.start_foo_~i~1#1_289| 1))) (or (< v_ArrVal_1966 (select (select (store .cse6 |v_ULTIMATE.start_foo_~#a~0#1.base_187| .cse7) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse8 4))) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_187|) (< v_ArrVal_1962 (+ |c_ULTIMATE.start_foo_~i~1#1| 1)) (<= .cse9 |ULTIMATE.start_bar_~i~0#1|) (< 0 (let ((.cse10 (store .cse7 (+ .cse8 4) v_ArrVal_1966)) (.cse11 (* |ULTIMATE.start_bar_~i~0#1| 4))) (+ (select .cse10 .cse11) (select .cse10 (+ .cse11 4))))) (< |v_ULTIMATE.start_foo_~i~1#1_289| 0) (<= (+ |ULTIMATE.start_bar_~i~0#1| 1) |v_ULTIMATE.start_foo_~i~1#1_289|) (< v_ArrVal_1964 (select .cse12 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse8))) (< |c_ULTIMATE.start_main_~i~2#1| .cse9))))))))))) is different from false [2021-12-18 21:02:01,438 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (= (select |c_#length| |c_ULTIMATE.start_main_~#b~0#1.base|) 400)) (.cse0 (= |c_ULTIMATE.start_main_~#b~0#1.base| |c_ULTIMATE.start_foo_~#a~0#1.base|))) (and (or .cse0 (forall ((|ULTIMATE.start_bar_~i~0#1| Int) (v_ArrVal_1964 Int) (v_ArrVal_1966 Int)) (let ((.cse4 (* |c_ULTIMATE.start_foo_~i~1#1| 4))) (let ((.cse3 (store (select |c_#memory_int| |c_ULTIMATE.start_foo_~#a~0#1.base|) (+ |c_ULTIMATE.start_foo_~#a~0#1.offset| .cse4) v_ArrVal_1964))) (or (< 0 (let ((.cse1 (store .cse3 (+ |c_ULTIMATE.start_foo_~#a~0#1.offset| .cse4 4) v_ArrVal_1966)) (.cse2 (* |ULTIMATE.start_bar_~i~0#1| 4))) (+ (select .cse1 (+ |c_ULTIMATE.start_foo_~#a~0#1.offset| .cse2)) (select .cse1 (+ |c_ULTIMATE.start_foo_~#a~0#1.offset| .cse2 4))))) (< v_ArrVal_1964 |c_ULTIMATE.start_foo_#t~mem3#1|) (<= (+ |c_ULTIMATE.start_foo_~i~1#1| 1) |ULTIMATE.start_bar_~i~0#1|) (< v_ArrVal_1966 (select (select (store |c_#memory_int| |c_ULTIMATE.start_foo_~#a~0#1.base| .cse3) |c_ULTIMATE.start_foo_~b#1.base|) (+ |c_ULTIMATE.start_foo_~b#1.offset| .cse4 4))) (<= (+ |ULTIMATE.start_bar_~i~0#1| 1) |c_ULTIMATE.start_foo_~i~1#1|))))) (< (select |c_#length| |c_ULTIMATE.start_foo_~#a~0#1.base|) (+ |c_ULTIMATE.start_foo_~#a~0#1.offset| (* 4 |c_ULTIMATE.start_foo_~i~1#1|) 8))) (<= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) |c_ULTIMATE.start_main_~#b~0#1.offset|)) (= |c_ULTIMATE.start_main_~i~2#1| 1) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (or (not .cse5) (and (<= 1 |c_ULTIMATE.start_main_~i~2#1|) (<= (* 4 |c_ULTIMATE.start_main_~i~2#1|) 4))) (= 0 |c_ULTIMATE.start_main_~#b~0#1.offset|) (or .cse5 .cse0) (<= 0 |c_ULTIMATE.start_foo_~i~1#1|) (forall ((|ULTIMATE.start_foo_~#a~0#1.base| Int)) (or (= |c_ULTIMATE.start_main_~#b~0#1.base| |ULTIMATE.start_foo_~#a~0#1.base|) (forall ((|v_ULTIMATE.start_foo_~i~1#1_289| Int) (|ULTIMATE.start_bar_~i~0#1| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_187| Int) (v_ArrVal_1962 Int) (v_ArrVal_1959 (Array Int Int)) (v_ArrVal_1964 Int) (v_ArrVal_1966 Int)) (let ((.cse13 (store |c_#memory_int| |ULTIMATE.start_foo_~#a~0#1.base| v_ArrVal_1959))) (let ((.cse12 (store (select .cse13 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~2#1| 4)) v_ArrVal_1962))) (let ((.cse6 (store .cse13 |c_ULTIMATE.start_main_~#b~0#1.base| .cse12)) (.cse8 (* |v_ULTIMATE.start_foo_~i~1#1_289| 4))) (let ((.cse7 (store (select .cse6 |v_ULTIMATE.start_foo_~#a~0#1.base_187|) .cse8 v_ArrVal_1964)) (.cse9 (+ |v_ULTIMATE.start_foo_~i~1#1_289| 1))) (or (< v_ArrVal_1966 (select (select (store .cse6 |v_ULTIMATE.start_foo_~#a~0#1.base_187| .cse7) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse8 4))) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_187|) (< v_ArrVal_1962 (+ |c_ULTIMATE.start_foo_~i~1#1| 1)) (<= .cse9 |ULTIMATE.start_bar_~i~0#1|) (< 0 (let ((.cse10 (store .cse7 (+ .cse8 4) v_ArrVal_1966)) (.cse11 (* |ULTIMATE.start_bar_~i~0#1| 4))) (+ (select .cse10 .cse11) (select .cse10 (+ .cse11 4))))) (< |v_ULTIMATE.start_foo_~i~1#1_289| 0) (<= (+ |ULTIMATE.start_bar_~i~0#1| 1) |v_ULTIMATE.start_foo_~i~1#1_289|) (< v_ArrVal_1964 (select .cse12 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse8))) (< |c_ULTIMATE.start_main_~i~2#1| .cse9))))))))))) is different from false [2021-12-18 21:03:18,782 WARN L227 SmtUtils]: Spent 24.16s on a formula simplification. DAG size of input: 96 DAG size of output: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 21:04:17,261 WARN L227 SmtUtils]: Spent 20.18s on a formula simplification. DAG size of input: 106 DAG size of output: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 21:05:49,578 WARN L227 SmtUtils]: Spent 54.00s on a formula simplification. DAG size of input: 113 DAG size of output: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 21:07:28,678 WARN L227 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 115 DAG size of output: 113 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 21:09:11,966 WARN L227 SmtUtils]: Spent 1.08m on a formula simplification. DAG size of input: 112 DAG size of output: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 21:10:50,540 WARN L227 SmtUtils]: Spent 58.19s on a formula simplification. DAG size of input: 112 DAG size of output: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 21:11:49,178 WARN L227 SmtUtils]: Spent 20.29s on a formula simplification. DAG size of input: 110 DAG size of output: 108 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 21:12:49,742 WARN L227 SmtUtils]: Spent 20.19s on a formula simplification. DAG size of input: 102 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15