./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0513.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 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/memsafety/test-0513.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aaec9a71c2206d3d9fbfa56b3c6172e3ff60aad385f0ad346fdbde53f8ce1a2e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:05:26,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:05:26,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:05:26,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:05:26,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:05:26,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:05:26,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:05:26,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:05:26,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:05:26,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:05:26,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:05:26,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:05:26,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:05:26,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:05:26,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:05:26,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:05:26,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:05:26,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:05:26,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:05:26,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:05:26,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:05:26,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:05:26,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:05:26,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:05:26,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:05:26,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:05:26,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:05:26,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:05:26,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:05:26,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:05:26,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:05:26,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:05:26,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:05:26,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:05:26,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:05:26,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:05:26,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:05:26,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:05:26,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:05:26,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:05:26,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:05:26,366 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:05:26,391 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:05:26,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:05:26,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:05:26,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:05:26,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:05:26,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:05:26,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:05:26,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:05:26,394 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:05:26,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:05:26,395 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:05:26,395 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:05:26,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:05:26,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:05:26,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:05:26,395 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:05:26,396 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:05:26,396 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:05:26,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:05:26,396 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:05:26,396 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:05:26,396 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:05:26,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:05:26,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:05:26,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:05:26,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:05:26,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:05:26,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:05:26,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:05:26,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:05:26,399 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:05:26,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aaec9a71c2206d3d9fbfa56b3c6172e3ff60aad385f0ad346fdbde53f8ce1a2e [2021-12-21 18:05:26,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:05:26,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:05:26,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:05:26,601 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:05:26,602 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:05:26,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0513.i [2021-12-21 18:05:26,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d03a45a7/d7a1cfa93a6e4ddcb34b597e606bdb6b/FLAG093dc4519 [2021-12-21 18:05:27,051 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:05:27,051 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0513.i [2021-12-21 18:05:27,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d03a45a7/d7a1cfa93a6e4ddcb34b597e606bdb6b/FLAG093dc4519 [2021-12-21 18:05:27,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d03a45a7/d7a1cfa93a6e4ddcb34b597e606bdb6b [2021-12-21 18:05:27,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:05:27,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:05:27,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:05:27,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:05:27,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:05:27,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:05:27" (1/1) ... [2021-12-21 18:05:27,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@609f0cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:27, skipping insertion in model container [2021-12-21 18:05:27,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:05:27" (1/1) ... [2021-12-21 18:05:27,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:05:27,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:05:27,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:05:27,332 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:05:27,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:05:27,381 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:05:27,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:27 WrapperNode [2021-12-21 18:05:27,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:05:27,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:05:27,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:05:27,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:05:27,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:27" (1/1) ... [2021-12-21 18:05:27,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:27" (1/1) ... [2021-12-21 18:05:27,434 INFO L137 Inliner]: procedures = 123, calls = 37, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 124 [2021-12-21 18:05:27,434 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:05:27,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:05:27,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:05:27,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:05:27,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:27" (1/1) ... [2021-12-21 18:05:27,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:27" (1/1) ... [2021-12-21 18:05:27,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:27" (1/1) ... [2021-12-21 18:05:27,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:27" (1/1) ... [2021-12-21 18:05:27,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:27" (1/1) ... [2021-12-21 18:05:27,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:27" (1/1) ... [2021-12-21 18:05:27,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:27" (1/1) ... [2021-12-21 18:05:27,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:05:27,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:05:27,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:05:27,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:05:27,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:27" (1/1) ... [2021-12-21 18:05:27,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:05:27,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:27,514 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) [2021-12-21 18:05:27,516 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 [2021-12-21 18:05:27,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 18:05:27,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 18:05:27,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 18:05:27,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 18:05:27,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 18:05:27,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 18:05:27,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:05:27,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 18:05:27,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:05:27,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:05:27,647 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:05:27,648 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:05:28,016 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:05:28,021 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:05:28,025 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 18:05:28,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:05:28 BoogieIcfgContainer [2021-12-21 18:05:28,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:05:28,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:05:28,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:05:28,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:05:28,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:05:27" (1/3) ... [2021-12-21 18:05:28,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cf8a2be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:05:28, skipping insertion in model container [2021-12-21 18:05:28,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:05:27" (2/3) ... [2021-12-21 18:05:28,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cf8a2be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:05:28, skipping insertion in model container [2021-12-21 18:05:28,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:05:28" (3/3) ... [2021-12-21 18:05:28,036 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0513.i [2021-12-21 18:05:28,040 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:05:28,041 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2021-12-21 18:05:28,070 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:05:28,074 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 [2021-12-21 18:05:28,075 INFO L340 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2021-12-21 18:05:28,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 69 states have (on average 2.101449275362319) internal successors, (145), 131 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-21 18:05:28,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:28,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-21 18:05:28,096 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:28,100 INFO L85 PathProgramCache]: Analyzing trace with hash 28740643, now seen corresponding path program 1 times [2021-12-21 18:05:28,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:28,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239947187] [2021-12-21 18:05:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:28,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:28,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:28,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239947187] [2021-12-21 18:05:28,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239947187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:28,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:28,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:05:28,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496754095] [2021-12-21 18:05:28,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:28,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 18:05:28,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:28,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 18:05:28,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:05:28,221 INFO L87 Difference]: Start difference. First operand has 132 states, 69 states have (on average 2.101449275362319) internal successors, (145), 131 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-12-21 18:05:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:28,238 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2021-12-21 18:05:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 18:05:28,240 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2021-12-21 18:05:28,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:28,246 INFO L225 Difference]: With dead ends: 132 [2021-12-21 18:05:28,246 INFO L226 Difference]: Without dead ends: 130 [2021-12-21 18:05:28,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:05:28,249 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:28,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:05:28,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-21 18:05:28,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-21 18:05:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 129 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2021-12-21 18:05:28,273 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 5 [2021-12-21 18:05:28,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:28,273 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2021-12-21 18:05:28,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-12-21 18:05:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2021-12-21 18:05:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:05:28,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:28,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:05:28,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 18:05:28,274 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:28,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:28,275 INFO L85 PathProgramCache]: Analyzing trace with hash 889570808, now seen corresponding path program 1 times [2021-12-21 18:05:28,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:28,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144808615] [2021-12-21 18:05:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:28,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:28,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:28,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144808615] [2021-12-21 18:05:28,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144808615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:28,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:28,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:05:28,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336291445] [2021-12-21 18:05:28,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:28,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:05:28,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:28,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:05:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:05:28,303 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:28,413 INFO L93 Difference]: Finished difference Result 176 states and 186 transitions. [2021-12-21 18:05:28,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:05:28,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 18:05:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:28,415 INFO L225 Difference]: With dead ends: 176 [2021-12-21 18:05:28,415 INFO L226 Difference]: Without dead ends: 175 [2021-12-21 18:05:28,415 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 [2021-12-21 18:05:28,416 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 42 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:28,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 192 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:28,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-21 18:05:28,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 133. [2021-12-21 18:05:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 71 states have (on average 2.0) internal successors, (142), 132 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2021-12-21 18:05:28,425 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 6 [2021-12-21 18:05:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:28,425 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2021-12-21 18:05:28,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,426 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2021-12-21 18:05:28,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:05:28,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:28,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:05:28,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 18:05:28,426 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:28,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:28,427 INFO L85 PathProgramCache]: Analyzing trace with hash 889570732, now seen corresponding path program 1 times [2021-12-21 18:05:28,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:28,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528614840] [2021-12-21 18:05:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:28,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:28,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:28,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528614840] [2021-12-21 18:05:28,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528614840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:28,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:28,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:05:28,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930816470] [2021-12-21 18:05:28,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:28,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:05:28,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:05:28,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:05:28,459 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:28,504 INFO L93 Difference]: Finished difference Result 145 states and 152 transitions. [2021-12-21 18:05:28,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:05:28,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 18:05:28,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:28,505 INFO L225 Difference]: With dead ends: 145 [2021-12-21 18:05:28,506 INFO L226 Difference]: Without dead ends: 144 [2021-12-21 18:05:28,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:05:28,507 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 15 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:28,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 229 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:05:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-21 18:05:28,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2021-12-21 18:05:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 76 states have (on average 1.9736842105263157) internal successors, (150), 137 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 150 transitions. [2021-12-21 18:05:28,525 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 150 transitions. Word has length 6 [2021-12-21 18:05:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:28,526 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 150 transitions. [2021-12-21 18:05:28,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,526 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 150 transitions. [2021-12-21 18:05:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:05:28,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:28,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:05:28,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 18:05:28,528 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:28,532 INFO L85 PathProgramCache]: Analyzing trace with hash 889571339, now seen corresponding path program 1 times [2021-12-21 18:05:28,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:28,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016035548] [2021-12-21 18:05:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:28,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:28,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:28,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016035548] [2021-12-21 18:05:28,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016035548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:28,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:28,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:05:28,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272716024] [2021-12-21 18:05:28,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:28,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:05:28,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:28,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:05:28,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:05:28,584 INFO L87 Difference]: Start difference. First operand 138 states and 150 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:28,691 INFO L93 Difference]: Finished difference Result 169 states and 183 transitions. [2021-12-21 18:05:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:05:28,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 18:05:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:28,694 INFO L225 Difference]: With dead ends: 169 [2021-12-21 18:05:28,694 INFO L226 Difference]: Without dead ends: 169 [2021-12-21 18:05:28,695 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 [2021-12-21 18:05:28,703 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 75 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:28,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 167 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:28,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-21 18:05:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 139. [2021-12-21 18:05:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 80 states have (on average 1.9125) internal successors, (153), 138 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2021-12-21 18:05:28,713 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 6 [2021-12-21 18:05:28,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:28,714 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2021-12-21 18:05:28,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2021-12-21 18:05:28,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:05:28,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:28,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:05:28,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 18:05:28,715 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:28,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:28,716 INFO L85 PathProgramCache]: Analyzing trace with hash 889571340, now seen corresponding path program 1 times [2021-12-21 18:05:28,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:28,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465727705] [2021-12-21 18:05:28,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:28,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:28,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:28,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465727705] [2021-12-21 18:05:28,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465727705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:28,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:28,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:05:28,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123086953] [2021-12-21 18:05:28,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:28,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:05:28,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:28,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:05:28,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:05:28,750 INFO L87 Difference]: Start difference. First operand 139 states and 153 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:28,813 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2021-12-21 18:05:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:05:28,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 18:05:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:28,814 INFO L225 Difference]: With dead ends: 137 [2021-12-21 18:05:28,814 INFO L226 Difference]: Without dead ends: 137 [2021-12-21 18:05:28,815 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 [2021-12-21 18:05:28,819 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 22 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:28,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 173 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:28,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-21 18:05:28,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-12-21 18:05:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 80 states have (on average 1.8625) internal successors, (149), 136 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 149 transitions. [2021-12-21 18:05:28,836 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 149 transitions. Word has length 6 [2021-12-21 18:05:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:28,836 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 149 transitions. [2021-12-21 18:05:28,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,836 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 149 transitions. [2021-12-21 18:05:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:05:28,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:28,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:28,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 18:05:28,837 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:28,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2119659887, now seen corresponding path program 1 times [2021-12-21 18:05:28,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:28,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070149766] [2021-12-21 18:05:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:28,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:28,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:28,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070149766] [2021-12-21 18:05:28,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070149766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:28,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:28,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:05:28,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648132431] [2021-12-21 18:05:28,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:28,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:05:28,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:28,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:05:28,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:05:28,903 INFO L87 Difference]: Start difference. First operand 137 states and 149 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2021-12-21 18:05:28,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:28,949 INFO L93 Difference]: Finished difference Result 133 states and 145 transitions. [2021-12-21 18:05:28,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:05:28,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 [2021-12-21 18:05:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:28,957 INFO L225 Difference]: With dead ends: 133 [2021-12-21 18:05:28,957 INFO L226 Difference]: Without dead ends: 133 [2021-12-21 18:05:28,957 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 [2021-12-21 18:05:28,958 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 23 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:28,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 168 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:05:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-21 18:05:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-21 18:05:28,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 80 states have (on average 1.8125) internal successors, (145), 132 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2021-12-21 18:05:28,961 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 11 [2021-12-21 18:05:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:28,962 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2021-12-21 18:05:28,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2021-12-21 18:05:28,962 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2021-12-21 18:05:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:05:28,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:28,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:28,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 18:05:28,963 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:28,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2119659886, now seen corresponding path program 1 times [2021-12-21 18:05:28,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:28,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367293610] [2021-12-21 18:05:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:28,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:28,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:28,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367293610] [2021-12-21 18:05:28,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367293610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:28,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:28,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:05:28,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839440939] [2021-12-21 18:05:28,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:28,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:05:28,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:28,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:05:28,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:05:28,997 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2021-12-21 18:05:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:29,055 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2021-12-21 18:05:29,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:05:29,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 [2021-12-21 18:05:29,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:29,057 INFO L225 Difference]: With dead ends: 130 [2021-12-21 18:05:29,057 INFO L226 Difference]: Without dead ends: 130 [2021-12-21 18:05:29,057 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 [2021-12-21 18:05:29,059 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 12 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:29,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 179 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-21 18:05:29,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-21 18:05:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 80 states have (on average 1.775) internal successors, (142), 129 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:29,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2021-12-21 18:05:29,064 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 11 [2021-12-21 18:05:29,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:29,065 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2021-12-21 18:05:29,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2021-12-21 18:05:29,065 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2021-12-21 18:05:29,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 18:05:29,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:29,066 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:29,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 18:05:29,066 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:29,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:29,069 INFO L85 PathProgramCache]: Analyzing trace with hash -967503371, now seen corresponding path program 1 times [2021-12-21 18:05:29,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:29,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839579666] [2021-12-21 18:05:29,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:29,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:29,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:29,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839579666] [2021-12-21 18:05:29,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839579666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:29,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:29,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:05:29,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112681465] [2021-12-21 18:05:29,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:29,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:05:29,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:29,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:05:29,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:05:29,131 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) 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) [2021-12-21 18:05:29,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:29,201 INFO L93 Difference]: Finished difference Result 228 states and 248 transitions. [2021-12-21 18:05:29,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:05:29,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) 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 [2021-12-21 18:05:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:29,202 INFO L225 Difference]: With dead ends: 228 [2021-12-21 18:05:29,202 INFO L226 Difference]: Without dead ends: 228 [2021-12-21 18:05:29,202 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 [2021-12-21 18:05:29,203 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 126 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:29,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 251 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:29,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-21 18:05:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 130. [2021-12-21 18:05:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 80 states have (on average 1.75) internal successors, (140), 129 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 140 transitions. [2021-12-21 18:05:29,208 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 140 transitions. Word has length 18 [2021-12-21 18:05:29,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:29,208 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 140 transitions. [2021-12-21 18:05:29,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) 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) [2021-12-21 18:05:29,209 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 140 transitions. [2021-12-21 18:05:29,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 18:05:29,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:29,209 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:29,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 18:05:29,212 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:29,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:29,212 INFO L85 PathProgramCache]: Analyzing trace with hash -967503447, now seen corresponding path program 1 times [2021-12-21 18:05:29,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:29,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346755072] [2021-12-21 18:05:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:29,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:29,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:29,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346755072] [2021-12-21 18:05:29,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346755072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:29,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:29,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:05:29,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196518084] [2021-12-21 18:05:29,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:29,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:05:29,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:29,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:05:29,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:05:29,273 INFO L87 Difference]: Start difference. First operand 130 states and 140 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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) [2021-12-21 18:05:29,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:29,382 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2021-12-21 18:05:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:05:29,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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 [2021-12-21 18:05:29,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:29,383 INFO L225 Difference]: With dead ends: 124 [2021-12-21 18:05:29,383 INFO L226 Difference]: Without dead ends: 124 [2021-12-21 18:05:29,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:05:29,384 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 46 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:29,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 213 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:29,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-21 18:05:29,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-12-21 18:05:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 81 states have (on average 1.654320987654321) internal successors, (134), 122 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2021-12-21 18:05:29,386 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 18 [2021-12-21 18:05:29,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:29,387 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2021-12-21 18:05:29,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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) [2021-12-21 18:05:29,388 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2021-12-21 18:05:29,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 18:05:29,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:29,388 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:29,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 18:05:29,388 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash -967503446, now seen corresponding path program 1 times [2021-12-21 18:05:29,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:29,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554383092] [2021-12-21 18:05:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:29,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:29,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:29,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554383092] [2021-12-21 18:05:29,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554383092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:29,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:29,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:05:29,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885679713] [2021-12-21 18:05:29,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:29,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:05:29,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:29,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:05:29,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:05:29,448 INFO L87 Difference]: Start difference. First operand 123 states and 134 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) [2021-12-21 18:05:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:29,569 INFO L93 Difference]: Finished difference Result 204 states and 223 transitions. [2021-12-21 18:05:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:05:29,569 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 [2021-12-21 18:05:29,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:29,570 INFO L225 Difference]: With dead ends: 204 [2021-12-21 18:05:29,570 INFO L226 Difference]: Without dead ends: 204 [2021-12-21 18:05:29,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:05:29,571 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 100 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:29,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 168 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:29,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-21 18:05:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 162. [2021-12-21 18:05:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 122 states have (on average 1.680327868852459) internal successors, (205), 161 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:29,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 205 transitions. [2021-12-21 18:05:29,574 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 205 transitions. Word has length 18 [2021-12-21 18:05:29,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:29,574 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 205 transitions. [2021-12-21 18:05:29,574 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) [2021-12-21 18:05:29,575 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 205 transitions. [2021-12-21 18:05:29,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 18:05:29,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:29,575 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:29,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 18:05:29,576 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:29,576 INFO L85 PathProgramCache]: Analyzing trace with hash 199814016, now seen corresponding path program 1 times [2021-12-21 18:05:29,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:29,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2764861] [2021-12-21 18:05:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:29,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:29,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:29,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2764861] [2021-12-21 18:05:29,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2764861] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:29,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:29,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:05:29,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295532080] [2021-12-21 18:05:29,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:29,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:05:29,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:29,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:05:29,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:05:29,650 INFO L87 Difference]: Start difference. First operand 162 states and 205 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:29,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:29,740 INFO L93 Difference]: Finished difference Result 205 states and 224 transitions. [2021-12-21 18:05:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:05:29,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-21 18:05:29,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:29,741 INFO L225 Difference]: With dead ends: 205 [2021-12-21 18:05:29,741 INFO L226 Difference]: Without dead ends: 205 [2021-12-21 18:05:29,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:05:29,742 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 225 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:29,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 309 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-21 18:05:29,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 163. [2021-12-21 18:05:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 123 states have (on average 1.6747967479674797) internal successors, (206), 162 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 206 transitions. [2021-12-21 18:05:29,745 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 206 transitions. Word has length 23 [2021-12-21 18:05:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:29,745 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 206 transitions. [2021-12-21 18:05:29,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 206 transitions. [2021-12-21 18:05:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 18:05:29,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:29,746 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:29,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 18:05:29,746 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash 198674982, now seen corresponding path program 1 times [2021-12-21 18:05:29,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:29,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156902046] [2021-12-21 18:05:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:29,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:29,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:29,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156902046] [2021-12-21 18:05:29,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156902046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:29,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:29,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:05:29,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501817147] [2021-12-21 18:05:29,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:29,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:05:29,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:29,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:05:29,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:05:29,807 INFO L87 Difference]: Start difference. First operand 163 states and 206 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:29,915 INFO L93 Difference]: Finished difference Result 191 states and 235 transitions. [2021-12-21 18:05:29,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:05:29,915 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-21 18:05:29,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:29,917 INFO L225 Difference]: With dead ends: 191 [2021-12-21 18:05:29,917 INFO L226 Difference]: Without dead ends: 191 [2021-12-21 18:05:29,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:05:29,918 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 23 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:29,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 399 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-21 18:05:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 170. [2021-12-21 18:05:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 130 states have (on average 1.646153846153846) internal successors, (214), 169 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2021-12-21 18:05:29,921 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 23 [2021-12-21 18:05:29,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:29,922 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2021-12-21 18:05:29,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2021-12-21 18:05:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 18:05:29,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:29,924 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:29,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 18:05:29,924 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr56REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:29,924 INFO L85 PathProgramCache]: Analyzing trace with hash -165115758, now seen corresponding path program 1 times [2021-12-21 18:05:29,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:29,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839307806] [2021-12-21 18:05:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:29,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:30,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:30,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839307806] [2021-12-21 18:05:30,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839307806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:30,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:30,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 18:05:30,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810892635] [2021-12-21 18:05:30,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:30,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 18:05:30,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:30,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 18:05:30,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:05:30,079 INFO L87 Difference]: Start difference. First operand 170 states and 214 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:30,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:30,494 INFO L93 Difference]: Finished difference Result 228 states and 279 transitions. [2021-12-21 18:05:30,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:05:30,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-21 18:05:30,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:30,495 INFO L225 Difference]: With dead ends: 228 [2021-12-21 18:05:30,495 INFO L226 Difference]: Without dead ends: 228 [2021-12-21 18:05:30,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:05:30,495 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 127 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:30,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 491 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:05:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-21 18:05:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 177. [2021-12-21 18:05:30,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 137 states have (on average 1.6277372262773722) internal successors, (223), 176 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) [2021-12-21 18:05:30,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2021-12-21 18:05:30,499 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 26 [2021-12-21 18:05:30,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:30,499 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 223 transitions. [2021-12-21 18:05:30,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:30,499 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 223 transitions. [2021-12-21 18:05:30,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 18:05:30,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:30,500 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:30,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 18:05:30,500 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:30,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:30,500 INFO L85 PathProgramCache]: Analyzing trace with hash -165115757, now seen corresponding path program 1 times [2021-12-21 18:05:30,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:30,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842066979] [2021-12-21 18:05:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:30,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:30,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:30,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842066979] [2021-12-21 18:05:30,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842066979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:30,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:30,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 18:05:30,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104943346] [2021-12-21 18:05:30,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:30,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 18:05:30,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:30,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 18:05:30,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:05:30,682 INFO L87 Difference]: Start difference. First operand 177 states and 223 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:30,967 INFO L93 Difference]: Finished difference Result 207 states and 251 transitions. [2021-12-21 18:05:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:05:30,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-21 18:05:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:30,968 INFO L225 Difference]: With dead ends: 207 [2021-12-21 18:05:30,968 INFO L226 Difference]: Without dead ends: 207 [2021-12-21 18:05:30,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-21 18:05:30,969 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 75 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:30,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 353 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:05:30,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-21 18:05:30,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 177. [2021-12-21 18:05:30,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 137 states have (on average 1.6204379562043796) internal successors, (222), 176 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 222 transitions. [2021-12-21 18:05:30,972 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 222 transitions. Word has length 26 [2021-12-21 18:05:30,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:30,972 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 222 transitions. [2021-12-21 18:05:30,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:30,972 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 222 transitions. [2021-12-21 18:05:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 18:05:30,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:30,973 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:30,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 18:05:30,973 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:30,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:30,973 INFO L85 PathProgramCache]: Analyzing trace with hash -823622550, now seen corresponding path program 1 times [2021-12-21 18:05:30,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:30,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383485275] [2021-12-21 18:05:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:30,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:31,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:31,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383485275] [2021-12-21 18:05:31,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383485275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:31,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:31,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 18:05:31,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690326473] [2021-12-21 18:05:31,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:31,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:05:31,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:31,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:05:31,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:05:31,092 INFO L87 Difference]: Start difference. First operand 177 states and 222 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:31,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:31,206 INFO L93 Difference]: Finished difference Result 194 states and 238 transitions. [2021-12-21 18:05:31,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:05:31,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-21 18:05:31,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:31,207 INFO L225 Difference]: With dead ends: 194 [2021-12-21 18:05:31,207 INFO L226 Difference]: Without dead ends: 194 [2021-12-21 18:05:31,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:05:31,209 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 44 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:31,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 406 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:31,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-21 18:05:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 177. [2021-12-21 18:05:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 137 states have (on average 1.6131386861313868) internal successors, (221), 176 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 221 transitions. [2021-12-21 18:05:31,212 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 221 transitions. Word has length 27 [2021-12-21 18:05:31,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:31,212 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 221 transitions. [2021-12-21 18:05:31,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 221 transitions. [2021-12-21 18:05:31,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 18:05:31,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:31,215 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:31,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 18:05:31,215 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:31,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:31,215 INFO L85 PathProgramCache]: Analyzing trace with hash 237551634, now seen corresponding path program 1 times [2021-12-21 18:05:31,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:31,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535416489] [2021-12-21 18:05:31,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:31,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:31,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:31,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535416489] [2021-12-21 18:05:31,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535416489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:31,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:31,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 18:05:31,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576957057] [2021-12-21 18:05:31,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:31,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 18:05:31,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:31,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 18:05:31,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:05:31,310 INFO L87 Difference]: Start difference. First operand 177 states and 221 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:31,540 INFO L93 Difference]: Finished difference Result 229 states and 275 transitions. [2021-12-21 18:05:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:05:31,541 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-21 18:05:31,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:31,541 INFO L225 Difference]: With dead ends: 229 [2021-12-21 18:05:31,541 INFO L226 Difference]: Without dead ends: 229 [2021-12-21 18:05:31,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-21 18:05:31,542 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 172 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:31,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 569 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:05:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-21 18:05:31,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 179. [2021-12-21 18:05:31,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 139 states have (on average 1.60431654676259) internal successors, (223), 178 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) [2021-12-21 18:05:31,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 223 transitions. [2021-12-21 18:05:31,545 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 223 transitions. Word has length 28 [2021-12-21 18:05:31,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:31,545 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 223 transitions. [2021-12-21 18:05:31,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 223 transitions. [2021-12-21 18:05:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 18:05:31,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:31,545 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:31,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 18:05:31,545 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:31,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:31,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1225833714, now seen corresponding path program 1 times [2021-12-21 18:05:31,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:31,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749414859] [2021-12-21 18:05:31,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:31,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:31,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:31,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749414859] [2021-12-21 18:05:31,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749414859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:31,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:31,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 18:05:31,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128712128] [2021-12-21 18:05:31,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:31,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 18:05:31,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:31,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 18:05:31,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:05:31,632 INFO L87 Difference]: Start difference. First operand 179 states and 223 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:31,846 INFO L93 Difference]: Finished difference Result 200 states and 244 transitions. [2021-12-21 18:05:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:05:31,846 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-21 18:05:31,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:31,847 INFO L225 Difference]: With dead ends: 200 [2021-12-21 18:05:31,847 INFO L226 Difference]: Without dead ends: 200 [2021-12-21 18:05:31,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:05:31,848 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 56 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:31,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 481 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:05:31,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-21 18:05:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 180. [2021-12-21 18:05:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 140 states have (on average 1.6) internal successors, (224), 179 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 224 transitions. [2021-12-21 18:05:31,850 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 224 transitions. Word has length 29 [2021-12-21 18:05:31,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:31,850 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 224 transitions. [2021-12-21 18:05:31,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 224 transitions. [2021-12-21 18:05:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 18:05:31,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:31,851 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:31,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 18:05:31,851 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:31,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:31,851 INFO L85 PathProgramCache]: Analyzing trace with hash 653860756, now seen corresponding path program 1 times [2021-12-21 18:05:31,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:31,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956728443] [2021-12-21 18:05:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:31,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 18:05:31,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:31,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956728443] [2021-12-21 18:05:31,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956728443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:31,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:31,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:05:31,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726080875] [2021-12-21 18:05:31,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:31,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:05:31,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:31,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:05:31,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:05:31,881 INFO L87 Difference]: Start difference. First operand 180 states and 224 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:31,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:31,990 INFO L93 Difference]: Finished difference Result 251 states and 315 transitions. [2021-12-21 18:05:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:05:31,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-21 18:05:31,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:31,992 INFO L225 Difference]: With dead ends: 251 [2021-12-21 18:05:31,992 INFO L226 Difference]: Without dead ends: 251 [2021-12-21 18:05:31,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:05:31,992 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 77 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:31,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 230 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-21 18:05:31,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 184. [2021-12-21 18:05:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 146 states have (on average 1.6095890410958904) internal successors, (235), 183 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 235 transitions. [2021-12-21 18:05:31,996 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 235 transitions. Word has length 30 [2021-12-21 18:05:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:31,996 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 235 transitions. [2021-12-21 18:05:31,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 235 transitions. [2021-12-21 18:05:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 18:05:31,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:31,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:31,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 18:05:31,997 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr56REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:31,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1294968215, now seen corresponding path program 1 times [2021-12-21 18:05:31,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:31,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254451828] [2021-12-21 18:05:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:31,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:32,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:32,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254451828] [2021-12-21 18:05:32,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254451828] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:32,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134735946] [2021-12-21 18:05:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:32,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:32,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:32,303 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) [2021-12-21 18:05:32,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 18:05:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:32,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-21 18:05:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:32,479 INFO L387 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 [2021-12-21 18:05:32,489 INFO L387 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 [2021-12-21 18:05:32,520 INFO L387 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 19 treesize of output 18 [2021-12-21 18:05:32,524 INFO L387 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 19 treesize of output 18 [2021-12-21 18:05:32,597 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:05:32,598 INFO L387 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 [2021-12-21 18:05:32,614 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:05:32,615 INFO L387 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 [2021-12-21 18:05:32,681 INFO L387 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 23 treesize of output 22 [2021-12-21 18:05:32,691 INFO L353 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-21 18:05:32,691 INFO L387 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 26 treesize of output 36 [2021-12-21 18:05:32,995 INFO L387 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 [2021-12-21 18:05:33,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:05:33,401 INFO L353 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-12-21 18:05:33,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 48 [2021-12-21 18:05:33,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:05:33,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-21 18:05:33,419 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:05:33,419 INFO L387 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 [2021-12-21 18:05:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:33,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:33,710 INFO L387 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 [2021-12-21 18:05:34,246 INFO L353 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-12-21 18:05:34,246 INFO L387 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 72 [2021-12-21 18:05:34,430 INFO L387 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 57 treesize of output 53 [2021-12-21 18:05:34,606 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~lItem~0#1.base| Int)) (let ((.cse0 (select v_arrayElimArr_1 4))) (or (not (= (select v_arrayElimArr_1 (+ 4 |c_ULTIMATE.start_main_~lItem~0#1.offset|)) |c_ULTIMATE.start_main_~item~0#1.base|)) (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~lItem~0#1.base| v_arrayElimArr_1) .cse0) 0) 0) (= |ULTIMATE.start_main_~lItem~0#1.base| .cse0)))) (forall ((|ULTIMATE.start_main_~lItem~0#1.base| Int) (v_arrayElimCell_16 Int) (v_ArrVal_422 (Array Int Int))) (let ((.cse1 (= (+ 4 |c_ULTIMATE.start_main_~lItem~0#1.offset|) 4))) (let ((.cse3 (not .cse1)) (.cse2 (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~lItem~0#1.base| v_ArrVal_422))) (or (and (= |ULTIMATE.start_main_~lItem~0#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) .cse1) (and (= (select (select .cse2 |c_ULTIMATE.start_main_~item~0#1.base|) 0) 0) .cse1) (and (= |ULTIMATE.start_main_~lItem~0#1.base| v_arrayElimCell_16) .cse3) (and .cse3 (= (select (select .cse2 v_arrayElimCell_16) 0) 0))))))) is different from false [2021-12-21 18:05:34,832 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~lItem~0#1.base| Int)) (let ((.cse0 (select v_arrayElimArr_1 4))) (or (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~lItem~0#1.base| v_arrayElimArr_1) .cse0) 0) 0) (not (= .cse0 |c_ULTIMATE.start_main_~item~0#1.base|)) (= |ULTIMATE.start_main_~lItem~0#1.base| .cse0)))) (forall ((|ULTIMATE.start_main_~lItem~0#1.base| Int) (v_ArrVal_422 (Array Int Int))) (or (= |ULTIMATE.start_main_~lItem~0#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) (= (select (select (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~lItem~0#1.base| v_ArrVal_422) |c_ULTIMATE.start_main_~item~0#1.base|) 0) 0)))) is different from false [2021-12-21 18:05:34,857 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~lItem~0#1.base| Int) (v_ArrVal_418 Int)) (let ((.cse0 (select v_arrayElimArr_1 4))) (or (not (= .cse0 |c_ULTIMATE.start_main_~item~0#1.base|)) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) (+ |c_ULTIMATE.start_main_~item~0#1.offset| 4) v_ArrVal_418)) |ULTIMATE.start_main_~lItem~0#1.base| v_arrayElimArr_1) .cse0) 0) 0) (= |ULTIMATE.start_main_~lItem~0#1.base| .cse0)))) (forall ((|ULTIMATE.start_main_~lItem~0#1.base| Int) (v_ArrVal_415 Int) (v_ArrVal_422 (Array Int Int))) (or (= |ULTIMATE.start_main_~lItem~0#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base|) (+ |c_ULTIMATE.start_main_~item~0#1.offset| 4) v_ArrVal_415)) |ULTIMATE.start_main_~lItem~0#1.base| v_ArrVal_422) |c_ULTIMATE.start_main_~item~0#1.base|) 0) 0)))) is different from false [2021-12-21 18:05:34,909 INFO L353 Elim1Store]: treesize reduction 23, result has 50.0 percent of original size [2021-12-21 18:05:34,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-12-21 18:05:34,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:05:34,915 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:05:34,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 11 [2021-12-21 18:05:34,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:05:34,920 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-12-21 18:05:34,921 INFO L387 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 2 case distinctions, treesize of input 23 treesize of output 1 [2021-12-21 18:05:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:34,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134735946] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:05:34,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:05:34,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 41 [2021-12-21 18:05:34,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921784278] [2021-12-21 18:05:34,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:34,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-21 18:05:34,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-21 18:05:34,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1253, Unknown=8, NotChecked=222, Total=1640 [2021-12-21 18:05:34,928 INFO L87 Difference]: Start difference. First operand 184 states and 235 transitions. Second operand has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:34,953 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) 0) (forall ((v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~lItem~0#1.base| Int) (v_ArrVal_418 Int)) (let ((.cse0 (select v_arrayElimArr_1 4))) (or (not (= .cse0 |c_ULTIMATE.start_main_~item~0#1.base|)) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) (+ |c_ULTIMATE.start_main_~item~0#1.offset| 4) v_ArrVal_418)) |ULTIMATE.start_main_~lItem~0#1.base| v_arrayElimArr_1) .cse0) 0) 0) (= |ULTIMATE.start_main_~lItem~0#1.base| .cse0)))) (forall ((|ULTIMATE.start_main_~lItem~0#1.base| Int) (v_ArrVal_415 Int) (v_ArrVal_422 (Array Int Int))) (or (= |ULTIMATE.start_main_~lItem~0#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base|) (+ |c_ULTIMATE.start_main_~item~0#1.offset| 4) v_ArrVal_415)) |ULTIMATE.start_main_~lItem~0#1.base| v_ArrVal_422) |c_ULTIMATE.start_main_~item~0#1.base|) 0) 0))) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~item~0#1.offset| 0)) is different from false [2021-12-21 18:05:34,956 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) 0) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~item~0#1.offset| 0) (forall ((v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~lItem~0#1.base| Int)) (let ((.cse0 (select v_arrayElimArr_1 4))) (or (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~lItem~0#1.base| v_arrayElimArr_1) .cse0) 0) 0) (not (= .cse0 |c_ULTIMATE.start_main_~item~0#1.base|)) (= |ULTIMATE.start_main_~lItem~0#1.base| .cse0)))) (forall ((|ULTIMATE.start_main_~lItem~0#1.base| Int) (v_ArrVal_422 (Array Int Int))) (or (= |ULTIMATE.start_main_~lItem~0#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) (= (select (select (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~lItem~0#1.base| v_ArrVal_422) |c_ULTIMATE.start_main_~item~0#1.base|) 0) 0)))) is different from false [2021-12-21 18:05:34,959 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base|)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|))) (and (= (select .cse0 0) 0) (= |c_ULTIMATE.start_main_~lItem~0#1.offset| 0) (forall ((v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~lItem~0#1.base| Int)) (let ((.cse1 (select v_arrayElimArr_1 4))) (or (not (= (select v_arrayElimArr_1 (+ 4 |c_ULTIMATE.start_main_~lItem~0#1.offset|)) |c_ULTIMATE.start_main_~item~0#1.base|)) (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~lItem~0#1.base| v_arrayElimArr_1) .cse1) 0) 0) (= |ULTIMATE.start_main_~lItem~0#1.base| .cse1)))) (= 0 (select .cse2 0)) (= |c_ULTIMATE.start_main_~item~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~lItem~0#1.base| Int) (v_arrayElimCell_16 Int) (v_ArrVal_422 (Array Int Int))) (let ((.cse3 (= (+ 4 |c_ULTIMATE.start_main_~lItem~0#1.offset|) 4))) (let ((.cse5 (not .cse3)) (.cse4 (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~lItem~0#1.base| v_ArrVal_422))) (or (and (= |ULTIMATE.start_main_~lItem~0#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) .cse3) (and (= (select (select .cse4 |c_ULTIMATE.start_main_~item~0#1.base|) 0) 0) .cse3) (and (= |ULTIMATE.start_main_~lItem~0#1.base| v_arrayElimCell_16) .cse5) (and .cse5 (= (select (select .cse4 v_arrayElimCell_16) 0) 0)))))) (or (= |c_ULTIMATE.start_main_~lItem~0#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) (and (= (select .cse0 |c_ULTIMATE.start_main_~item~0#1.offset|) 0) (= (select .cse2 |c_ULTIMATE.start_main_~item~0#1.offset|) 0))))) is different from false [2021-12-21 18:05:35,087 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) 0)) (.cse2 (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) 0)) (.cse0 (= |c_ULTIMATE.start_main_~item~0#1.offset| 0))) (and (or (= |c_ULTIMATE.start_main_~item~0#1.base| |c_ULTIMATE.start_main_~data~0#1.base|) (not .cse0) (and .cse1 .cse2)) .cse1 (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) (+ |c_ULTIMATE.start_main_~data~0#1.offset| 4)))) (or (= .cse3 |c_ULTIMATE.start_main_~data~0#1.base|) (and (= (select (select |c_#memory_$Pointer$.offset| .cse3) 0) 0) (= (select (select |c_#memory_$Pointer$.base| .cse3) 0) 0)))) (= |c_ULTIMATE.start_main_~data~0#1.offset| 0) (forall ((v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~lItem~0#1.base| Int) (v_ArrVal_418 Int)) (let ((.cse4 (select v_arrayElimArr_1 4))) (or (not (= .cse4 |c_ULTIMATE.start_main_~item~0#1.base|)) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) (+ |c_ULTIMATE.start_main_~item~0#1.offset| 4) v_ArrVal_418)) |ULTIMATE.start_main_~lItem~0#1.base| v_arrayElimArr_1) .cse4) 0) 0) (= |ULTIMATE.start_main_~lItem~0#1.base| .cse4)))) (forall ((|ULTIMATE.start_main_~lItem~0#1.base| Int) (v_ArrVal_415 Int) (v_ArrVal_422 (Array Int Int))) (or (= |ULTIMATE.start_main_~lItem~0#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base|) (+ |c_ULTIMATE.start_main_~item~0#1.offset| 4) v_ArrVal_415)) |ULTIMATE.start_main_~lItem~0#1.base| v_ArrVal_422) |c_ULTIMATE.start_main_~item~0#1.base|) 0) 0))) .cse2 .cse0)) is different from false [2021-12-21 18:05:35,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:35,622 INFO L93 Difference]: Finished difference Result 209 states and 261 transitions. [2021-12-21 18:05:35,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 18:05:35,623 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-21 18:05:35,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:35,623 INFO L225 Difference]: With dead ends: 209 [2021-12-21 18:05:35,623 INFO L226 Difference]: Without dead ends: 209 [2021-12-21 18:05:35,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=284, Invalid=1988, Unknown=12, NotChecked=686, Total=2970 [2021-12-21 18:05:35,624 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 236 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 825 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:35,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 1436 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 899 Invalid, 0 Unknown, 825 Unchecked, 0.4s Time] [2021-12-21 18:05:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-21 18:05:35,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 186. [2021-12-21 18:05:35,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 148 states have (on average 1.6013513513513513) internal successors, (237), 185 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 237 transitions. [2021-12-21 18:05:35,627 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 237 transitions. Word has length 32 [2021-12-21 18:05:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:35,627 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 237 transitions. [2021-12-21 18:05:35,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:35,627 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 237 transitions. [2021-12-21 18:05:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 18:05:35,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:35,628 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:35,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:35,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:35,829 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:35,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1489307653, now seen corresponding path program 1 times [2021-12-21 18:05:35,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:35,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091124716] [2021-12-21 18:05:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:35,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:36,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:36,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091124716] [2021-12-21 18:05:36,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091124716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:36,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19456887] [2021-12-21 18:05:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:36,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:36,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:36,064 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) [2021-12-21 18:05:36,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 18:05:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:36,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-21 18:05:36,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:36,284 INFO L387 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 [2021-12-21 18:05:36,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:05:36,389 INFO L387 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 44 treesize of output 36 [2021-12-21 18:05:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:36,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:37,020 INFO L387 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 108 treesize of output 96 [2021-12-21 18:05:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:39,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19456887] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:05:39,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:05:39,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 35 [2021-12-21 18:05:39,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128288217] [2021-12-21 18:05:39,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:39,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 18:05:39,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:39,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 18:05:39,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 18:05:39,877 INFO L87 Difference]: Start difference. First operand 186 states and 237 transitions. Second operand has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:40,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:40,335 INFO L93 Difference]: Finished difference Result 188 states and 238 transitions. [2021-12-21 18:05:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 18:05:40,336 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-21 18:05:40,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:40,336 INFO L225 Difference]: With dead ends: 188 [2021-12-21 18:05:40,337 INFO L226 Difference]: Without dead ends: 171 [2021-12-21 18:05:40,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2021-12-21 18:05:40,337 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 23 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 582 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:40,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 938 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 483 Invalid, 0 Unknown, 582 Unchecked, 0.2s Time] [2021-12-21 18:05:40,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-21 18:05:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-12-21 18:05:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 133 states have (on average 1.6616541353383458) internal successors, (221), 170 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:40,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 221 transitions. [2021-12-21 18:05:40,340 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 221 transitions. Word has length 33 [2021-12-21 18:05:40,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:40,340 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 221 transitions. [2021-12-21 18:05:40,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:40,340 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 221 transitions. [2021-12-21 18:05:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 18:05:40,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:40,340 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:40,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:40,551 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,SelfDestructingSolverStorable19 [2021-12-21 18:05:40,552 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:40,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:40,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1756679628, now seen corresponding path program 1 times [2021-12-21 18:05:40,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:40,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682865474] [2021-12-21 18:05:40,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:40,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:40,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:40,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682865474] [2021-12-21 18:05:40,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682865474] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:40,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978833960] [2021-12-21 18:05:40,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:40,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:40,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:40,637 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) [2021-12-21 18:05:40,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 18:05:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:40,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 18:05:40,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:40,817 INFO L387 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 [2021-12-21 18:05:40,823 INFO L387 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 [2021-12-21 18:05:40,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:40,851 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 52 [2021-12-21 18:05:40,860 INFO L353 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-21 18:05:40,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2021-12-21 18:05:41,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:05:41,012 INFO L387 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 25 treesize of output 13 [2021-12-21 18:05:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:41,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:05:41,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978833960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:41,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:41,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 17 [2021-12-21 18:05:41,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167990061] [2021-12-21 18:05:41,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:41,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 18:05:41,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:41,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 18:05:41,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:05:41,031 INFO L87 Difference]: Start difference. First operand 171 states and 221 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:41,301 INFO L93 Difference]: Finished difference Result 210 states and 237 transitions. [2021-12-21 18:05:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 18:05:41,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-21 18:05:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:41,302 INFO L225 Difference]: With dead ends: 210 [2021-12-21 18:05:41,302 INFO L226 Difference]: Without dead ends: 210 [2021-12-21 18:05:41,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-12-21 18:05:41,303 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 269 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:41,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 479 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:05:41,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-21 18:05:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 171. [2021-12-21 18:05:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 133 states have (on average 1.6541353383458646) internal successors, (220), 170 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 220 transitions. [2021-12-21 18:05:41,306 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 220 transitions. Word has length 37 [2021-12-21 18:05:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:41,306 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 220 transitions. [2021-12-21 18:05:41,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 220 transitions. [2021-12-21 18:05:41,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 18:05:41,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:41,306 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:41,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:41,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:41,507 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:41,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:41,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1756679629, now seen corresponding path program 1 times [2021-12-21 18:05:41,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:41,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771780956] [2021-12-21 18:05:41,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:41,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:41,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:41,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771780956] [2021-12-21 18:05:41,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771780956] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:41,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190476731] [2021-12-21 18:05:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:41,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:41,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:41,593 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) [2021-12-21 18:05:41,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 18:05:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:41,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 18:05:41,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:41,743 INFO L387 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 [2021-12-21 18:05:41,794 INFO L387 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 [2021-12-21 18:05:41,801 INFO L387 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 [2021-12-21 18:05:41,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:41,837 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 46 [2021-12-21 18:05:41,846 INFO L353 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-21 18:05:41,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-12-21 18:05:41,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:05:41,960 INFO L387 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 25 treesize of output 13 [2021-12-21 18:05:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:41,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:05:41,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190476731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:41,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:41,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2021-12-21 18:05:41,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948281639] [2021-12-21 18:05:41,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:41,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 18:05:41,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 18:05:41,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:05:41,964 INFO L87 Difference]: Start difference. First operand 171 states and 220 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:42,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:42,253 INFO L93 Difference]: Finished difference Result 196 states and 223 transitions. [2021-12-21 18:05:42,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 18:05:42,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-21 18:05:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:42,254 INFO L225 Difference]: With dead ends: 196 [2021-12-21 18:05:42,254 INFO L226 Difference]: Without dead ends: 196 [2021-12-21 18:05:42,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-12-21 18:05:42,256 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 268 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:42,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 424 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:05:42,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-21 18:05:42,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 171. [2021-12-21 18:05:42,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 133 states have (on average 1.6466165413533835) internal successors, (219), 170 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 219 transitions. [2021-12-21 18:05:42,259 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 219 transitions. Word has length 37 [2021-12-21 18:05:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:42,259 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 219 transitions. [2021-12-21 18:05:42,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 219 transitions. [2021-12-21 18:05:42,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-21 18:05:42,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:42,260 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:42,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-21 18:05:42,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:42,475 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr56REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:42,476 INFO L85 PathProgramCache]: Analyzing trace with hash 507133380, now seen corresponding path program 1 times [2021-12-21 18:05:42,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:42,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100402055] [2021-12-21 18:05:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:42,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:42,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:42,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100402055] [2021-12-21 18:05:42,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100402055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:42,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86819470] [2021-12-21 18:05:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:42,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:42,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:42,549 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) [2021-12-21 18:05:42,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 18:05:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:42,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 18:05:42,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:42,655 INFO L387 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 [2021-12-21 18:05:42,675 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:42,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-21 18:05:42,687 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:05:42,688 INFO L387 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 [2021-12-21 18:05:42,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:05:42,707 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:05:42,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-12-21 18:05:42,718 INFO L387 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 16 treesize of output 8 [2021-12-21 18:05:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:42,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:42,746 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_887 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~lItem~0#1.base| v_ArrVal_887) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.base|))) is different from false [2021-12-21 18:05:42,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:05:42,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2021-12-21 18:05:42,752 INFO L387 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 33 treesize of output 25 [2021-12-21 18:05:42,754 INFO L387 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 6 treesize of output 4 [2021-12-21 18:05:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-21 18:05:42,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86819470] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:05:42,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:05:42,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-12-21 18:05:42,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613016266] [2021-12-21 18:05:42,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:42,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:05:42,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:42,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:05:42,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2021-12-21 18:05:42,809 INFO L87 Difference]: Start difference. First operand 171 states and 219 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:43,014 INFO L93 Difference]: Finished difference Result 171 states and 216 transitions. [2021-12-21 18:05:43,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:05:43,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-21 18:05:43,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:43,015 INFO L225 Difference]: With dead ends: 171 [2021-12-21 18:05:43,015 INFO L226 Difference]: Without dead ends: 171 [2021-12-21 18:05:43,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=251, Unknown=1, NotChecked=34, Total=380 [2021-12-21 18:05:43,015 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 89 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:43,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 496 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 356 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2021-12-21 18:05:43,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-21 18:05:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2021-12-21 18:05:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 129 states have (on average 1.6589147286821706) internal successors, (214), 166 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 214 transitions. [2021-12-21 18:05:43,018 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 214 transitions. Word has length 40 [2021-12-21 18:05:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:43,018 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 214 transitions. [2021-12-21 18:05:43,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 214 transitions. [2021-12-21 18:05:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 18:05:43,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:43,018 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:43,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:43,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-21 18:05:43,231 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:43,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:43,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1119299147, now seen corresponding path program 1 times [2021-12-21 18:05:43,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:43,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212363229] [2021-12-21 18:05:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:43,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 18:05:43,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:43,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212363229] [2021-12-21 18:05:43,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212363229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:43,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:43,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:05:43,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142740724] [2021-12-21 18:05:43,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:43,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:05:43,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:43,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:05:43,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:05:43,275 INFO L87 Difference]: Start difference. First operand 167 states and 214 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:43,405 INFO L93 Difference]: Finished difference Result 166 states and 212 transitions. [2021-12-21 18:05:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:05:43,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-12-21 18:05:43,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:43,406 INFO L225 Difference]: With dead ends: 166 [2021-12-21 18:05:43,406 INFO L226 Difference]: Without dead ends: 166 [2021-12-21 18:05:43,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:05:43,406 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 25 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:43,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 305 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:43,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-21 18:05:43,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-12-21 18:05:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 129 states have (on average 1.6434108527131783) internal successors, (212), 165 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 212 transitions. [2021-12-21 18:05:43,409 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 212 transitions. Word has length 41 [2021-12-21 18:05:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:43,410 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 212 transitions. [2021-12-21 18:05:43,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 212 transitions. [2021-12-21 18:05:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 18:05:43,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:43,410 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:43,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 18:05:43,410 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:43,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:43,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1119299146, now seen corresponding path program 1 times [2021-12-21 18:05:43,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:43,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394178284] [2021-12-21 18:05:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:43,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:43,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:43,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394178284] [2021-12-21 18:05:43,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394178284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:43,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084825952] [2021-12-21 18:05:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:43,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:43,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:43,592 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) [2021-12-21 18:05:43,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 18:05:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:43,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 18:05:43,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:43,833 INFO L387 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 [2021-12-21 18:05:43,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:43,864 INFO L387 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 19 treesize of output 18 [2021-12-21 18:05:44,013 INFO L387 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 23 treesize of output 15 [2021-12-21 18:05:44,016 INFO L387 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 26 treesize of output 14 [2021-12-21 18:05:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:44,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:05:44,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084825952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:44,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:44,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 21 [2021-12-21 18:05:44,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616426733] [2021-12-21 18:05:44,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:44,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:05:44,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:44,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:05:44,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-21 18:05:44,054 INFO L87 Difference]: Start difference. First operand 166 states and 212 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:44,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:44,354 INFO L93 Difference]: Finished difference Result 226 states and 253 transitions. [2021-12-21 18:05:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 18:05:44,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2021-12-21 18:05:44,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:44,355 INFO L225 Difference]: With dead ends: 226 [2021-12-21 18:05:44,355 INFO L226 Difference]: Without dead ends: 226 [2021-12-21 18:05:44,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-12-21 18:05:44,356 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 375 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:44,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 391 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:05:44,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-21 18:05:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 166. [2021-12-21 18:05:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 129 states have (on average 1.627906976744186) internal successors, (210), 165 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 210 transitions. [2021-12-21 18:05:44,358 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 210 transitions. Word has length 41 [2021-12-21 18:05:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:44,358 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 210 transitions. [2021-12-21 18:05:44,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:44,358 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 210 transitions. [2021-12-21 18:05:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 18:05:44,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:44,359 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:44,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:44,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:44,571 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:44,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:44,571 INFO L85 PathProgramCache]: Analyzing trace with hash -716785192, now seen corresponding path program 1 times [2021-12-21 18:05:44,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:44,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215401525] [2021-12-21 18:05:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:44,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:44,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:44,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215401525] [2021-12-21 18:05:44,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215401525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:44,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721492243] [2021-12-21 18:05:44,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:44,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:44,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:44,668 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) [2021-12-21 18:05:44,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 18:05:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:05:44,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:44,917 INFO L387 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 [2021-12-21 18:05:44,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:44,952 INFO L387 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 21 treesize of output 20 [2021-12-21 18:05:45,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:05:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:45,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:45,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721492243] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:05:45,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:05:45,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2021-12-21 18:05:45,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631299124] [2021-12-21 18:05:45,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:45,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 18:05:45,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:45,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 18:05:45,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-21 18:05:45,202 INFO L87 Difference]: Start difference. First operand 166 states and 210 transitions. Second operand has 19 states, 18 states have (on average 5.277777777777778) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:45,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:45,701 INFO L93 Difference]: Finished difference Result 186 states and 212 transitions. [2021-12-21 18:05:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 18:05:45,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.277777777777778) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-21 18:05:45,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:45,703 INFO L225 Difference]: With dead ends: 186 [2021-12-21 18:05:45,703 INFO L226 Difference]: Without dead ends: 186 [2021-12-21 18:05:45,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=373, Invalid=1267, Unknown=0, NotChecked=0, Total=1640 [2021-12-21 18:05:45,704 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 474 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:45,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 659 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 490 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2021-12-21 18:05:45,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-21 18:05:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 166. [2021-12-21 18:05:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 129 states have (on average 1.62015503875969) internal successors, (209), 165 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 209 transitions. [2021-12-21 18:05:45,706 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 209 transitions. Word has length 45 [2021-12-21 18:05:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:45,707 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 209 transitions. [2021-12-21 18:05:45,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.277777777777778) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:05:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 209 transitions. [2021-12-21 18:05:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 18:05:45,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:45,709 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:45,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-21 18:05:45,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:45,915 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 58 more)] === [2021-12-21 18:05:45,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:45,916 INFO L85 PathProgramCache]: Analyzing trace with hash 829868235, now seen corresponding path program 1 times [2021-12-21 18:05:45,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:45,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104041409] [2021-12-21 18:05:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:45,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:46,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:46,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104041409] [2021-12-21 18:05:46,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104041409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:46,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279486507] [2021-12-21 18:05:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:46,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:46,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:46,200 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) [2021-12-21 18:05:46,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 18:05:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:46,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-21 18:05:46,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:46,340 INFO L387 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 [2021-12-21 18:05:46,354 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:05:46,354 INFO L387 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 14 [2021-12-21 18:05:46,414 INFO L387 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 [2021-12-21 18:05:46,463 INFO L353 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-12-21 18:05:46,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 41 [2021-12-21 18:05:46,507 INFO L387 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 24 treesize of output 24 [2021-12-21 18:05:46,536 INFO L387 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 24 treesize of output 24 [2021-12-21 18:05:46,602 INFO L353 Elim1Store]: treesize reduction 78, result has 31.6 percent of original size [2021-12-21 18:05:46,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 31 treesize of output 53 [2021-12-21 18:05:46,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-12-21 18:05:46,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:46,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2021-12-21 18:05:46,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:46,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:46,878 INFO L353 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-21 18:05:46,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 48 [2021-12-21 18:05:47,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:05:47,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:47,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 28 [2021-12-21 18:05:47,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-21 18:05:47,609 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-21 18:05:47,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 30 [2021-12-21 18:05:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:05:47,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:47,985 INFO L387 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 32 treesize of output 20 [2021-12-21 18:05:48,423 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1364 (Array Int Int)) (v_ArrVal_1369 Int) (v_ArrVal_1368 Int)) (let ((.cse1 (select (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~lItem~0#1.base| v_ArrVal_1364))) (store .cse3 |c_ULTIMATE.start_main_~data~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset| |c_ULTIMATE.start_main_~lItem~0#1.base|))))) (store .cse2 |c_ULTIMATE.start_main_~lItem~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~lItem~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~lItem~0#1.offset|) v_ArrVal_1368))) |c_ULTIMATE.start_main_~data~0#1.base|))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_main_~data~0#1.offset|))) (or (= (select (store |c_#valid| .cse0 v_ArrVal_1369) (select .cse1 (+ |c_ULTIMATE.start_main_~data~0#1.offset| 4))) 1) (and (= .cse0 |c_ULTIMATE.start_main_~data~0#1.base|) (<= 0 |c_ULTIMATE.start_main_~data~0#1.offset|) (<= |c_ULTIMATE.start_main_~data~0#1.offset| 0)))))) is different from false [2021-12-21 18:05:52,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:05:52,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 306 treesize of output 196 [2021-12-21 18:05:52,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:05:52,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:05:52,806 INFO L387 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 1358 treesize of output 1344 [2021-12-21 18:05:52,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:05:52,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:05:52,818 INFO L387 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 0 case distinctions, treesize of input 2144 treesize of output 1984 [2021-12-21 18:05:52,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:05:52,834 INFO L387 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 1189 treesize of output 1157