./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:54:52,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:54:52,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:54:52,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:54:52,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:54:52,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:54:52,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:54:52,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:54:52,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:54:52,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:54:52,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:54:52,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:54:52,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:54:52,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:54:52,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:54:52,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:54:52,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:54:52,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:54:52,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:54:52,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:54:52,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:54:52,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:54:52,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:54:52,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:54:52,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:54:52,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:54:52,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:54:52,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:54:52,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:54:52,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:54:52,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:54:52,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:54:52,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:54:52,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:54:52,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:54:52,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:54:52,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:54:52,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:54:52,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:54:52,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:54:52,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:54:52,391 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 05:54:52,408 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:54:52,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:54:52,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:54:52,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:54:52,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:54:52,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:54:52,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:54:52,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:54:52,411 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:54:52,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:54:52,412 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:54:52,412 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:54:52,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:54:52,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:54:52,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:54:52,412 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:54:52,412 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:54:52,413 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:54:52,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:54:52,413 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:54:52,413 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:54:52,413 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:54:52,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:54:52,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:54:52,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:54:52,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:54:52,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:54:52,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:54:52,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:54:52,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:54:52,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:54:52,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 [2021-12-16 05:54:52,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:54:52,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:54:52,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:54:52,655 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:54:52,656 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:54:52,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2021-12-16 05:54:52,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bd582ae8/d183924dac55476ab6d1bf32fb27d444/FLAGcfe11c74b [2021-12-16 05:54:53,055 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:54:53,056 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2021-12-16 05:54:53,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bd582ae8/d183924dac55476ab6d1bf32fb27d444/FLAGcfe11c74b [2021-12-16 05:54:53,075 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bd582ae8/d183924dac55476ab6d1bf32fb27d444 [2021-12-16 05:54:53,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:54:53,079 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:54:53,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:54:53,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:54:53,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:54:53,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:54:53" (1/1) ... [2021-12-16 05:54:53,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55209096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:53, skipping insertion in model container [2021-12-16 05:54:53,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:54:53" (1/1) ... [2021-12-16 05:54:53,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:54:53,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:54:53,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:54:53,260 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:54:53,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:54:53,288 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:54:53,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:53 WrapperNode [2021-12-16 05:54:53,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:54:53,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:54:53,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:54:53,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:54:53,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:53" (1/1) ... [2021-12-16 05:54:53,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:53" (1/1) ... [2021-12-16 05:54:53,323 INFO L137 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2021-12-16 05:54:53,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:54:53,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:54:53,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:54:53,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:54:53,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:53" (1/1) ... [2021-12-16 05:54:53,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:53" (1/1) ... [2021-12-16 05:54:53,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:53" (1/1) ... [2021-12-16 05:54:53,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:53" (1/1) ... [2021-12-16 05:54:53,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:53" (1/1) ... [2021-12-16 05:54:53,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:53" (1/1) ... [2021-12-16 05:54:53,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:53" (1/1) ... [2021-12-16 05:54:53,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:54:53,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:54:53,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:54:53,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:54:53,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:53" (1/1) ... [2021-12-16 05:54:53,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:54:53,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:53,378 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 05:54:53,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 05:54:53,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 05:54:53,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:54:53,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:54:53,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 05:54:53,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 05:54:53,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:54:53,446 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:54:53,447 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:54:53,572 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:54:53,576 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:54:53,580 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 05:54:53,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:54:53 BoogieIcfgContainer [2021-12-16 05:54:53,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:54:53,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:54:53,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:54:53,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:54:53,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:54:53" (1/3) ... [2021-12-16 05:54:53,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71914a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:54:53, skipping insertion in model container [2021-12-16 05:54:53,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:53" (2/3) ... [2021-12-16 05:54:53,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71914a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:54:53, skipping insertion in model container [2021-12-16 05:54:53,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:54:53" (3/3) ... [2021-12-16 05:54:53,599 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2.c [2021-12-16 05:54:53,602 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:54:53,603 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-12-16 05:54:53,643 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:54:53,654 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 05:54:53,654 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-12-16 05:54:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-16 05:54:53,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:53,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-16 05:54:53,695 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:54:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:53,698 INFO L85 PathProgramCache]: Analyzing trace with hash 28698921, now seen corresponding path program 1 times [2021-12-16 05:54:53,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:53,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944723152] [2021-12-16 05:54:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:53,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:53,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:53,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944723152] [2021-12-16 05:54:53,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944723152] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:53,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:53,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:54:53,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94922175] [2021-12-16 05:54:53,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:53,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:54:53,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:53,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:54:53,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:54:53,904 INFO L87 Difference]: Start difference. First operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:53,982 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-12-16 05:54:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:54:53,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-16 05:54:53,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:53,990 INFO L225 Difference]: With dead ends: 69 [2021-12-16 05:54:53,990 INFO L226 Difference]: Without dead ends: 65 [2021-12-16 05:54:53,992 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 [2021-12-16 05:54:53,997 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 69 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:53,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 84 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:54:54,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-16 05:54:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2021-12-16 05:54:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-12-16 05:54:54,022 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 5 [2021-12-16 05:54:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:54,022 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-12-16 05:54:54,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-12-16 05:54:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:54:54,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:54,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:54,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 05:54:54,024 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:54:54,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:54,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1809811544, now seen corresponding path program 1 times [2021-12-16 05:54:54,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:54,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956759722] [2021-12-16 05:54:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:54,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:54,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:54,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956759722] [2021-12-16 05:54:54,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956759722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:54,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:54,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:54:54,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391207408] [2021-12-16 05:54:54,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:54,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:54:54,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:54,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:54:54,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:54:54,109 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:54,184 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-12-16 05:54:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:54:54,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 05:54:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:54,188 INFO L225 Difference]: With dead ends: 70 [2021-12-16 05:54:54,188 INFO L226 Difference]: Without dead ends: 70 [2021-12-16 05:54:54,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:54:54,192 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:54,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 116 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:54:54,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-16 05:54:54,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2021-12-16 05:54:54,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-12-16 05:54:54,200 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 7 [2021-12-16 05:54:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:54,201 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-12-16 05:54:54,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-12-16 05:54:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:54:54,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:54,201 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:54,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 05:54:54,202 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:54:54,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:54,204 INFO L85 PathProgramCache]: Analyzing trace with hash -489510905, now seen corresponding path program 1 times [2021-12-16 05:54:54,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:54,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636532590] [2021-12-16 05:54:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:54,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:54,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:54,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636532590] [2021-12-16 05:54:54,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636532590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:54,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:54,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:54:54,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558587242] [2021-12-16 05:54:54,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:54,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:54:54,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:54,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:54:54,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:54:54,254 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:54,308 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-12-16 05:54:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:54:54,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 05:54:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:54,310 INFO L225 Difference]: With dead ends: 75 [2021-12-16 05:54:54,310 INFO L226 Difference]: Without dead ends: 75 [2021-12-16 05:54:54,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:54:54,314 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 61 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:54,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 152 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:54:54,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-16 05:54:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2021-12-16 05:54:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-12-16 05:54:54,323 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 11 [2021-12-16 05:54:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:54,324 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-12-16 05:54:54,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-12-16 05:54:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:54:54,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:54,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:54,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 05:54:54,325 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:54:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:54,325 INFO L85 PathProgramCache]: Analyzing trace with hash -489508983, now seen corresponding path program 1 times [2021-12-16 05:54:54,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:54,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413145725] [2021-12-16 05:54:54,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:54,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:54,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:54,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413145725] [2021-12-16 05:54:54,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413145725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:54,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:54,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:54:54,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796592032] [2021-12-16 05:54:54,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:54,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:54:54,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:54,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:54:54,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:54:54,398 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:54,427 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-16 05:54:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:54:54,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 05:54:54,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:54,430 INFO L225 Difference]: With dead ends: 43 [2021-12-16 05:54:54,430 INFO L226 Difference]: Without dead ends: 43 [2021-12-16 05:54:54,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:54:54,435 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:54,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 31 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:54:54,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-16 05:54:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-16 05:54:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-12-16 05:54:54,448 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2021-12-16 05:54:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:54,448 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-12-16 05:54:54,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-12-16 05:54:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:54:54,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:54,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:54,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 05:54:54,449 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:54:54,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:54,450 INFO L85 PathProgramCache]: Analyzing trace with hash -489508982, now seen corresponding path program 1 times [2021-12-16 05:54:54,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:54,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240598142] [2021-12-16 05:54:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:54,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:54,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:54,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240598142] [2021-12-16 05:54:54,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240598142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:54,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:54,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:54:54,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810656473] [2021-12-16 05:54:54,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:54,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:54:54,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:54,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:54:54,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:54:54,516 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:54,556 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-12-16 05:54:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:54:54,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 05:54:54,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:54,557 INFO L225 Difference]: With dead ends: 50 [2021-12-16 05:54:54,557 INFO L226 Difference]: Without dead ends: 50 [2021-12-16 05:54:54,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:54:54,558 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:54,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:54:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-16 05:54:54,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-12-16 05:54:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-12-16 05:54:54,561 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 11 [2021-12-16 05:54:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:54,561 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-12-16 05:54:54,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,562 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-12-16 05:54:54,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 05:54:54,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:54,562 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:54,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 05:54:54,563 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:54:54,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:54,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839934, now seen corresponding path program 1 times [2021-12-16 05:54:54,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:54,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246869014] [2021-12-16 05:54:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:54,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:54,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:54,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246869014] [2021-12-16 05:54:54,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246869014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:54:54,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:54:54,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:54:54,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273194818] [2021-12-16 05:54:54,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:54:54,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:54:54,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:54,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:54:54,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:54:54,597 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:54:54,622 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-12-16 05:54:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:54:54,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-16 05:54:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:54:54,623 INFO L225 Difference]: With dead ends: 47 [2021-12-16 05:54:54,623 INFO L226 Difference]: Without dead ends: 47 [2021-12-16 05:54:54,624 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 [2021-12-16 05:54:54,624 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:54:54,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:54:54,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-16 05:54:54,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-16 05:54:54,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-12-16 05:54:54,627 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 16 [2021-12-16 05:54:54,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:54:54,627 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-12-16 05:54:54,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:54:54,627 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-12-16 05:54:54,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 05:54:54,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:54:54,628 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:54:54,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 05:54:54,628 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:54:54,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:54:54,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839933, now seen corresponding path program 1 times [2021-12-16 05:54:54,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:54:54,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778954422] [2021-12-16 05:54:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:54,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:54:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:54,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:54:54,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778954422] [2021-12-16 05:54:54,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778954422] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:54:54,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008670269] [2021-12-16 05:54:54,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:54:54,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:54:54,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:54:54,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:54:54,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 05:54:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:54:54,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 05:54:54,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:54:55,008 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:54:55,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-16 05:54:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:54:55,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:54:57,281 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~n#1_3| Int) (v_ArrVal_51 Int)) (or (< |v_ULTIMATE.start_foo_~n#1_3| |c_ULTIMATE.start_main_~i~2#1|) (< v_ArrVal_51 (* 4 |v_ULTIMATE.start_foo_~n#1_3|)) (and (<= 0 |c_ULTIMATE.start_main_~#b~0#1.offset|) (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_11| Int)) (<= (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4) (select (store |c_#length| |v_ULTIMATE.start_foo_~#a~0#1.base_11| v_ArrVal_51) |c_ULTIMATE.start_main_~#b~0#1.base|)))))) is different from false [2021-12-16 05:54:58,016 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~n#1_3| Int) (v_ArrVal_51 Int)) (or (< v_ArrVal_51 (* 4 |v_ULTIMATE.start_foo_~n#1_3|)) (< |v_ULTIMATE.start_foo_~n#1_3| (+ |c_ULTIMATE.start_main_~i~2#1| 1)) (and (<= 0 |c_ULTIMATE.start_main_~#b~0#1.offset|) (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_11| Int)) (<= (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4) (select (store |c_#length| |v_ULTIMATE.start_foo_~#a~0#1.base_11| v_ArrVal_51) |c_ULTIMATE.start_main_~#b~0#1.base|)))))) is different from false [2021-12-16 05:54:58,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-12-16 05:54:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-16 05:54:58,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008670269] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:54:58,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:54:58,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-16 05:54:58,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514809298] [2021-12-16 05:54:58,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:54:58,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 05:54:58,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:54:58,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 05:54:58,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=80, Unknown=2, NotChecked=38, Total=156 [2021-12-16 05:54:58,195 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:06,382 WARN L227 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 44 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 05:55:11,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:11,819 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-12-16 05:55:11,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 05:55:11,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-16 05:55:11,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:11,820 INFO L225 Difference]: With dead ends: 76 [2021-12-16 05:55:11,820 INFO L226 Difference]: Without dead ends: 76 [2021-12-16 05:55:11,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=101, Invalid=211, Unknown=2, NotChecked=66, Total=380 [2021-12-16 05:55:11,821 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:11,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 103 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 94 Invalid, 0 Unknown, 123 Unchecked, 0.1s Time] [2021-12-16 05:55:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-16 05:55:11,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 49. [2021-12-16 05:55:11,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:11,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-12-16 05:55:11,823 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 16 [2021-12-16 05:55:11,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:11,824 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-12-16 05:55:11,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:11,824 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-12-16 05:55:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:55:11,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:11,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:11,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 05:55:12,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:12,031 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:12,032 INFO L85 PathProgramCache]: Analyzing trace with hash -411440119, now seen corresponding path program 1 times [2021-12-16 05:55:12,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:12,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917842657] [2021-12-16 05:55:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:12,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:12,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:12,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917842657] [2021-12-16 05:55:12,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917842657] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:12,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356583298] [2021-12-16 05:55:12,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:12,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:12,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:12,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:12,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 05:55:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:12,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 05:55:12,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:12,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:12,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356583298] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:12,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:12,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-16 05:55:12,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639046335] [2021-12-16 05:55:12,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:12,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:55:12,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:12,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:55:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:55:12,166 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:12,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:12,193 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2021-12-16 05:55:12,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:55:12,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 05:55:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:12,194 INFO L225 Difference]: With dead ends: 112 [2021-12-16 05:55:12,194 INFO L226 Difference]: Without dead ends: 112 [2021-12-16 05:55:12,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:55:12,194 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 138 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:12,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 123 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:12,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-16 05:55:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2021-12-16 05:55:12,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 92 states have (on average 1.391304347826087) internal successors, (128), 99 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2021-12-16 05:55:12,207 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 17 [2021-12-16 05:55:12,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:12,207 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2021-12-16 05:55:12,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:12,207 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2021-12-16 05:55:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:55:12,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:12,208 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:12,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:12,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-16 05:55:12,425 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:12,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:12,425 INFO L85 PathProgramCache]: Analyzing trace with hash -411430410, now seen corresponding path program 1 times [2021-12-16 05:55:12,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:12,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61947494] [2021-12-16 05:55:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:12,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:55:12,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:12,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61947494] [2021-12-16 05:55:12,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61947494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:12,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:55:12,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:55:12,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226590841] [2021-12-16 05:55:12,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:12,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:55:12,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:12,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:55:12,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:55:12,450 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:12,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:12,463 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2021-12-16 05:55:12,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:55:12,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 05:55:12,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:12,464 INFO L225 Difference]: With dead ends: 99 [2021-12-16 05:55:12,464 INFO L226 Difference]: Without dead ends: 99 [2021-12-16 05:55:12,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:55:12,464 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:12,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:12,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-16 05:55:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-12-16 05:55:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 92 states have (on average 1.358695652173913) internal successors, (125), 98 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2021-12-16 05:55:12,484 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 17 [2021-12-16 05:55:12,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:12,484 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2021-12-16 05:55:12,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2021-12-16 05:55:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:55:12,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:12,485 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:12,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 05:55:12,486 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:12,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:12,488 INFO L85 PathProgramCache]: Analyzing trace with hash -411430409, now seen corresponding path program 1 times [2021-12-16 05:55:12,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:12,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150770142] [2021-12-16 05:55:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:12,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:12,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:12,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150770142] [2021-12-16 05:55:12,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150770142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:12,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253483590] [2021-12-16 05:55:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:12,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:12,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:12,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:12,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 05:55:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:12,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 05:55:12,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:12,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:55:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:12,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:12,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253483590] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:12,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:12,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-16 05:55:12,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067645179] [2021-12-16 05:55:12,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:12,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:55:12,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:12,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:55:12,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:55:12,677 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:12,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:12,739 INFO L93 Difference]: Finished difference Result 146 states and 185 transitions. [2021-12-16 05:55:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:55:12,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 05:55:12,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:12,741 INFO L225 Difference]: With dead ends: 146 [2021-12-16 05:55:12,741 INFO L226 Difference]: Without dead ends: 146 [2021-12-16 05:55:12,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:55:12,742 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 81 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:12,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 68 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:12,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-16 05:55:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2021-12-16 05:55:12,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 95 states have (on average 1.3473684210526315) internal successors, (128), 101 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 128 transitions. [2021-12-16 05:55:12,745 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 128 transitions. Word has length 17 [2021-12-16 05:55:12,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:12,745 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 128 transitions. [2021-12-16 05:55:12,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:12,746 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 128 transitions. [2021-12-16 05:55:12,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 05:55:12,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:12,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:12,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:12,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:12,963 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:12,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:12,963 INFO L85 PathProgramCache]: Analyzing trace with hash 130511665, now seen corresponding path program 1 times [2021-12-16 05:55:12,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:12,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252777716] [2021-12-16 05:55:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:12,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:55:12,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:12,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252777716] [2021-12-16 05:55:12,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252777716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:12,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:55:12,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:55:12,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280919320] [2021-12-16 05:55:12,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:12,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:55:12,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:12,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:55:12,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:55:12,989 INFO L87 Difference]: Start difference. First operand 102 states and 128 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:13,008 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2021-12-16 05:55:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:55:13,008 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 [2021-12-16 05:55:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:13,010 INFO L225 Difference]: With dead ends: 101 [2021-12-16 05:55:13,010 INFO L226 Difference]: Without dead ends: 101 [2021-12-16 05:55:13,010 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 [2021-12-16 05:55:13,011 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:13,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 53 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:13,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-16 05:55:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-16 05:55:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 100 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2021-12-16 05:55:13,014 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 18 [2021-12-16 05:55:13,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:13,015 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2021-12-16 05:55:13,015 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) [2021-12-16 05:55:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2021-12-16 05:55:13,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 05:55:13,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:13,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:13,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 05:55:13,016 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:13,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash 130511666, now seen corresponding path program 1 times [2021-12-16 05:55:13,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:13,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851949016] [2021-12-16 05:55:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:13,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:13,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:13,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851949016] [2021-12-16 05:55:13,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851949016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:13,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056559213] [2021-12-16 05:55:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:13,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:13,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:13,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:13,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 05:55:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:13,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 05:55:13,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:13,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:13,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056559213] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:13,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:13,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-16 05:55:13,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557012823] [2021-12-16 05:55:13,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:13,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:55:13,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:13,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:55:13,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:55:13,265 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:13,341 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2021-12-16 05:55:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:55:13,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-16 05:55:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:13,342 INFO L225 Difference]: With dead ends: 107 [2021-12-16 05:55:13,342 INFO L226 Difference]: Without dead ends: 107 [2021-12-16 05:55:13,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:55:13,343 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 62 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:13,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 117 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-16 05:55:13,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2021-12-16 05:55:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.2842105263157895) internal successors, (122), 100 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2021-12-16 05:55:13,345 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 18 [2021-12-16 05:55:13,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:13,345 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2021-12-16 05:55:13,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2021-12-16 05:55:13,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 05:55:13,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:13,346 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:13,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:13,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:13,555 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:13,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1752050598, now seen corresponding path program 1 times [2021-12-16 05:55:13,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:13,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747961859] [2021-12-16 05:55:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:13,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:13,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:13,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747961859] [2021-12-16 05:55:13,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747961859] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:13,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790363668] [2021-12-16 05:55:13,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:13,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:13,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:13,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:13,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 05:55:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:13,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 05:55:13,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:13,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:13,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790363668] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:13,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:13,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-16 05:55:13,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608825335] [2021-12-16 05:55:13,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:13,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:55:13,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:13,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:55:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:55:13,780 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:13,868 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2021-12-16 05:55:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:55:13,869 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-16 05:55:13,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:13,869 INFO L225 Difference]: With dead ends: 101 [2021-12-16 05:55:13,869 INFO L226 Difference]: Without dead ends: 101 [2021-12-16 05:55:13,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:55:13,870 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 119 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:13,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 116 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-16 05:55:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-12-16 05:55:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 98 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2021-12-16 05:55:13,872 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 21 [2021-12-16 05:55:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:13,872 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2021-12-16 05:55:13,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:13,872 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2021-12-16 05:55:13,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 05:55:13,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:13,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:13,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:14,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 05:55:14,073 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:14,073 INFO L85 PathProgramCache]: Analyzing trace with hash -93493367, now seen corresponding path program 1 times [2021-12-16 05:55:14,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:14,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119023345] [2021-12-16 05:55:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:14,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:55:14,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:14,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119023345] [2021-12-16 05:55:14,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119023345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:14,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081635307] [2021-12-16 05:55:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:14,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:14,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:14,140 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:14,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 05:55:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:14,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 05:55:14,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:14,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:55:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:55:14,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:55:14,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081635307] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:14,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:14,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-16 05:55:14,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932325155] [2021-12-16 05:55:14,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:14,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:55:14,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:14,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:55:14,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:55:14,366 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:14,540 INFO L93 Difference]: Finished difference Result 160 states and 185 transitions. [2021-12-16 05:55:14,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 05:55:14,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-16 05:55:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:14,541 INFO L225 Difference]: With dead ends: 160 [2021-12-16 05:55:14,542 INFO L226 Difference]: Without dead ends: 160 [2021-12-16 05:55:14,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-12-16 05:55:14,542 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 146 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:14,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 82 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-16 05:55:14,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 102. [2021-12-16 05:55:14,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.25) internal successors, (120), 101 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:14,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2021-12-16 05:55:14,547 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 23 [2021-12-16 05:55:14,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:14,548 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2021-12-16 05:55:14,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:14,548 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2021-12-16 05:55:14,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 05:55:14,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:14,550 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:14,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:14,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:14,767 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:14,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:14,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1409452358, now seen corresponding path program 1 times [2021-12-16 05:55:14,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:14,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008697004] [2021-12-16 05:55:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:14,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:55:14,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:14,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008697004] [2021-12-16 05:55:14,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008697004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:14,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402599138] [2021-12-16 05:55:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:14,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:14,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:14,824 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:14,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 05:55:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:14,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:55:14,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:55:14,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:55:14,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402599138] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:14,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:14,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2021-12-16 05:55:14,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044605888] [2021-12-16 05:55:14,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:14,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 05:55:14,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:15,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 05:55:15,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:55:15,000 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:15,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:15,062 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2021-12-16 05:55:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:55:15,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-16 05:55:15,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:15,063 INFO L225 Difference]: With dead ends: 99 [2021-12-16 05:55:15,063 INFO L226 Difference]: Without dead ends: 99 [2021-12-16 05:55:15,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:55:15,063 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:15,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 103 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:15,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-16 05:55:15,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2021-12-16 05:55:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 92 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2021-12-16 05:55:15,065 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 27 [2021-12-16 05:55:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:15,065 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2021-12-16 05:55:15,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:15,065 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2021-12-16 05:55:15,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 05:55:15,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:15,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:15,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:15,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:15,266 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:15,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:15,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1360755252, now seen corresponding path program 1 times [2021-12-16 05:55:15,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:15,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243119898] [2021-12-16 05:55:15,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:15,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:55:15,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:15,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243119898] [2021-12-16 05:55:15,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243119898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:15,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658396484] [2021-12-16 05:55:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:15,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:15,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:15,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:15,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 05:55:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:15,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 05:55:15,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:55:15,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:55:15,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658396484] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:15,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:15,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-16 05:55:15,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500292588] [2021-12-16 05:55:15,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:15,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 05:55:15,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:15,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 05:55:15,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:55:15,466 INFO L87 Difference]: Start difference. First operand 93 states and 108 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:15,568 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2021-12-16 05:55:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 05:55:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-16 05:55:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:15,569 INFO L225 Difference]: With dead ends: 95 [2021-12-16 05:55:15,569 INFO L226 Difference]: Without dead ends: 95 [2021-12-16 05:55:15,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:55:15,570 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 174 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:15,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 165 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:15,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-16 05:55:15,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-12-16 05:55:15,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 91 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2021-12-16 05:55:15,572 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 27 [2021-12-16 05:55:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:15,572 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2021-12-16 05:55:15,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2021-12-16 05:55:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 05:55:15,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:15,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:15,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-16 05:55:15,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 05:55:15,779 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:15,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:15,780 INFO L85 PathProgramCache]: Analyzing trace with hash -144329733, now seen corresponding path program 1 times [2021-12-16 05:55:15,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:15,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961600882] [2021-12-16 05:55:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:15,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:55:15,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:15,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961600882] [2021-12-16 05:55:15,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961600882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:15,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078226888] [2021-12-16 05:55:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:15,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:15,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:15,968 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:15,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 05:55:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:16,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-16 05:55:16,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:16,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:55:16,200 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-16 05:55:16,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-12-16 05:55:16,284 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 05:55:16,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-16 05:55:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:16,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:29,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-16 05:55:29,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-16 05:55:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:29,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078226888] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:29,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:29,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 15] total 32 [2021-12-16 05:55:29,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470578244] [2021-12-16 05:55:29,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:29,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-16 05:55:29,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:29,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-16 05:55:29,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=893, Unknown=2, NotChecked=0, Total=992 [2021-12-16 05:55:29,191 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:29,883 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2021-12-16 05:55:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 05:55:29,884 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-16 05:55:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:29,884 INFO L225 Difference]: With dead ends: 92 [2021-12-16 05:55:29,884 INFO L226 Difference]: Without dead ends: 92 [2021-12-16 05:55:29,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=341, Invalid=2309, Unknown=2, NotChecked=0, Total=2652 [2021-12-16 05:55:29,885 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:29,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 339 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 420 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2021-12-16 05:55:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-16 05:55:29,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-16 05:55:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.197674418604651) internal successors, (103), 91 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2021-12-16 05:55:29,887 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 31 [2021-12-16 05:55:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:29,887 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2021-12-16 05:55:29,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2021-12-16 05:55:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 05:55:29,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:29,888 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:29,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:30,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 05:55:30,095 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:30,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:30,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2032716941, now seen corresponding path program 1 times [2021-12-16 05:55:30,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:30,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728502313] [2021-12-16 05:55:30,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:30,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:55:30,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:30,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728502313] [2021-12-16 05:55:30,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728502313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558604876] [2021-12-16 05:55:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:30,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:30,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:30,223 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:30,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 05:55:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 05:55:30,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:30,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:30,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-16 05:55:30,521 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:55:30,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 05:55:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:55:30,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:30,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:55:30,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-16 05:55:30,757 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:55:30,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-16 05:55:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:55:30,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558604876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:30,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:30,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2021-12-16 05:55:30,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606148492] [2021-12-16 05:55:30,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:30,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 05:55:30,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:30,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 05:55:30,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-16 05:55:30,917 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:31,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:31,226 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2021-12-16 05:55:31,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 05:55:31,227 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-16 05:55:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:31,228 INFO L225 Difference]: With dead ends: 145 [2021-12-16 05:55:31,228 INFO L226 Difference]: Without dead ends: 145 [2021-12-16 05:55:31,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-12-16 05:55:31,228 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 158 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:31,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 235 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 241 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2021-12-16 05:55:31,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-16 05:55:31,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 99. [2021-12-16 05:55:31,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1914893617021276) internal successors, (112), 98 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:31,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2021-12-16 05:55:31,232 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 41 [2021-12-16 05:55:31,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:31,233 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2021-12-16 05:55:31,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2021-12-16 05:55:31,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 05:55:31,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:31,233 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:31,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:31,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 05:55:31,451 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1410284307, now seen corresponding path program 1 times [2021-12-16 05:55:31,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:31,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875159303] [2021-12-16 05:55:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:31,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:55:31,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:31,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875159303] [2021-12-16 05:55:31,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875159303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:31,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738686353] [2021-12-16 05:55:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:31,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:31,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:31,532 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:31,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 05:55:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:31,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 05:55:31,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:31,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:55:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:55:31,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:55:31,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738686353] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:31,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:31,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-16 05:55:31,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545223910] [2021-12-16 05:55:31,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:31,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 05:55:31,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:31,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 05:55:31,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:55:31,858 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:32,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:32,039 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2021-12-16 05:55:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:55:32,040 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-16 05:55:32,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:32,040 INFO L225 Difference]: With dead ends: 126 [2021-12-16 05:55:32,040 INFO L226 Difference]: Without dead ends: 126 [2021-12-16 05:55:32,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:55:32,041 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 95 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:32,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 167 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-16 05:55:32,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2021-12-16 05:55:32,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.1875) internal successors, (114), 100 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:32,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2021-12-16 05:55:32,043 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 42 [2021-12-16 05:55:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:32,044 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2021-12-16 05:55:32,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:32,044 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2021-12-16 05:55:32,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-16 05:55:32,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:32,045 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:32,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:32,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:32,262 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:32,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:32,262 INFO L85 PathProgramCache]: Analyzing trace with hash 183114832, now seen corresponding path program 2 times [2021-12-16 05:55:32,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:32,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427065648] [2021-12-16 05:55:32,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:32,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:55:32,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:32,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427065648] [2021-12-16 05:55:32,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427065648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:32,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782662728] [2021-12-16 05:55:32,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:55:32,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:32,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:32,324 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:32,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 05:55:32,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:55:32,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:32,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 05:55:32,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:55:32,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:55:32,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782662728] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:32,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:32,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-16 05:55:32,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499315855] [2021-12-16 05:55:32,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:32,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 05:55:32,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:32,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 05:55:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:55:32,605 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:32,776 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2021-12-16 05:55:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 05:55:32,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-16 05:55:32,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:32,777 INFO L225 Difference]: With dead ends: 118 [2021-12-16 05:55:32,777 INFO L226 Difference]: Without dead ends: 118 [2021-12-16 05:55:32,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:55:32,778 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 214 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:32,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 193 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-16 05:55:32,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2021-12-16 05:55:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 98 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-12-16 05:55:32,779 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 46 [2021-12-16 05:55:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:32,780 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-12-16 05:55:32,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-12-16 05:55:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 05:55:32,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:32,780 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-12-16 05:55:32,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:32,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:32,981 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:32,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:32,981 INFO L85 PathProgramCache]: Analyzing trace with hash 457132991, now seen corresponding path program 2 times [2021-12-16 05:55:32,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:32,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782217651] [2021-12-16 05:55:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:32,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:55:33,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:33,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782217651] [2021-12-16 05:55:33,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782217651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:33,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832178104] [2021-12-16 05:55:33,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:55:33,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:33,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:33,051 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:33,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 05:55:33,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:55:33,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:33,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:55:33,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:55:33,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:55:33,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832178104] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:33,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:33,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-16 05:55:33,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005536616] [2021-12-16 05:55:33,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:33,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 05:55:33,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:33,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 05:55:33,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:55:33,272 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:33,364 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2021-12-16 05:55:33,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:55:33,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-16 05:55:33,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:33,365 INFO L225 Difference]: With dead ends: 101 [2021-12-16 05:55:33,365 INFO L226 Difference]: Without dead ends: 101 [2021-12-16 05:55:33,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:55:33,367 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 73 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:33,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 156 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-16 05:55:33,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-12-16 05:55:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 98 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2021-12-16 05:55:33,371 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 47 [2021-12-16 05:55:33,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:33,371 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2021-12-16 05:55:33,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:33,372 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2021-12-16 05:55:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 05:55:33,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:33,372 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-12-16 05:55:33,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:33,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-16 05:55:33,586 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:33,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:33,587 INFO L85 PathProgramCache]: Analyzing trace with hash -269976254, now seen corresponding path program 3 times [2021-12-16 05:55:33,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:33,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386737331] [2021-12-16 05:55:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:33,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 05:55:33,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:33,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386737331] [2021-12-16 05:55:33,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386737331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:33,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114401570] [2021-12-16 05:55:33,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:55:33,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:33,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:33,705 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:33,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 05:55:33,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 05:55:33,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:33,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 05:55:33,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:33,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:55:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 05:55:33,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 05:55:34,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114401570] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:34,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:34,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 17 [2021-12-16 05:55:34,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261142162] [2021-12-16 05:55:34,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:34,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 05:55:34,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:34,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 05:55:34,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-16 05:55:34,260 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:34,853 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-12-16 05:55:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 05:55:34,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-16 05:55:34,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:34,855 INFO L225 Difference]: With dead ends: 128 [2021-12-16 05:55:34,855 INFO L226 Difference]: Without dead ends: 128 [2021-12-16 05:55:34,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 05:55:34,856 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 226 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:34,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 203 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:55:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-16 05:55:34,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2021-12-16 05:55:34,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 95 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2021-12-16 05:55:34,858 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 52 [2021-12-16 05:55:34,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:34,858 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2021-12-16 05:55:34,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2021-12-16 05:55:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-16 05:55:34,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:34,858 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-16 05:55:34,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:35,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:35,069 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:35,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1642790799, now seen corresponding path program 2 times [2021-12-16 05:55:35,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:35,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581504326] [2021-12-16 05:55:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:35,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 05:55:35,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:35,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581504326] [2021-12-16 05:55:35,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581504326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:35,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496757301] [2021-12-16 05:55:35,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:55:35,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:35,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:35,147 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:35,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 05:55:35,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:55:35,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:35,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 05:55:35,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 05:55:35,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 05:55:35,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496757301] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:35,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:35,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-16 05:55:35,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675419034] [2021-12-16 05:55:35,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:35,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 05:55:35,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:35,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 05:55:35,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:55:35,449 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:35,600 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2021-12-16 05:55:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:55:35,600 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-16 05:55:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:35,601 INFO L225 Difference]: With dead ends: 110 [2021-12-16 05:55:35,601 INFO L226 Difference]: Without dead ends: 110 [2021-12-16 05:55:35,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:55:35,601 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 97 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:35,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 294 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:35,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-16 05:55:35,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2021-12-16 05:55:35,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.11) internal successors, (111), 103 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2021-12-16 05:55:35,603 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 56 [2021-12-16 05:55:35,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:35,603 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2021-12-16 05:55:35,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:35,603 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2021-12-16 05:55:35,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-16 05:55:35,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:35,603 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-16 05:55:35,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:35,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:35,804 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:35,805 INFO L85 PathProgramCache]: Analyzing trace with hash 74449076, now seen corresponding path program 3 times [2021-12-16 05:55:35,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:35,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838392529] [2021-12-16 05:55:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:35,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 05:55:35,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:35,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838392529] [2021-12-16 05:55:35,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838392529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:35,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997887920] [2021-12-16 05:55:35,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:55:35,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:35,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:35,994 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:35,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 05:55:36,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 05:55:36,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:36,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 05:55:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:36,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:55:36,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:55:36,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:36,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 05:55:36,123 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:55:36,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 05:55:36,230 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:55:36,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 05:55:36,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 05:55:36,437 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:55:36,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-16 05:55:36,455 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:55:36,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 05:55:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 05:55:36,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:37,122 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:55:37,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-16 05:55:38,271 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:55:38,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-16 05:55:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 05:55:40,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997887920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:40,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:40,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 28 [2021-12-16 05:55:40,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182243603] [2021-12-16 05:55:40,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:40,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 05:55:40,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:40,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 05:55:40,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-12-16 05:55:40,822 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:41,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:41,393 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2021-12-16 05:55:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 05:55:41,394 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-16 05:55:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:41,394 INFO L225 Difference]: With dead ends: 169 [2021-12-16 05:55:41,394 INFO L226 Difference]: Without dead ends: 169 [2021-12-16 05:55:41,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=384, Invalid=1508, Unknown=0, NotChecked=0, Total=1892 [2021-12-16 05:55:41,395 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 273 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:41,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 228 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 193 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2021-12-16 05:55:41,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-16 05:55:41,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 163. [2021-12-16 05:55:41,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 159 states have (on average 1.1320754716981132) internal successors, (180), 162 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 180 transitions. [2021-12-16 05:55:41,397 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 180 transitions. Word has length 60 [2021-12-16 05:55:41,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:41,397 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 180 transitions. [2021-12-16 05:55:41,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 180 transitions. [2021-12-16 05:55:41,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-16 05:55:41,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:41,398 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-12-16 05:55:41,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:41,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-16 05:55:41,599 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:41,599 INFO L85 PathProgramCache]: Analyzing trace with hash -809246151, now seen corresponding path program 1 times [2021-12-16 05:55:41,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:41,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874769445] [2021-12-16 05:55:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:41,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 33 proven. 92 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 05:55:41,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:41,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874769445] [2021-12-16 05:55:41,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874769445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:41,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815020493] [2021-12-16 05:55:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:41,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:41,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:41,742 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:41,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 05:55:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:41,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 05:55:41,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:42,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:42,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-16 05:55:42,016 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:55:42,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 05:55:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 05:55:42,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:42,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:55:42,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-16 05:55:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 05:55:42,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815020493] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:42,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:42,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2021-12-16 05:55:42,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647365475] [2021-12-16 05:55:42,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:42,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 05:55:42,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:42,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 05:55:42,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-12-16 05:55:42,356 INFO L87 Difference]: Start difference. First operand 163 states and 180 transitions. Second operand has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:42,721 INFO L93 Difference]: Finished difference Result 244 states and 274 transitions. [2021-12-16 05:55:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 05:55:42,721 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-16 05:55:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:42,722 INFO L225 Difference]: With dead ends: 244 [2021-12-16 05:55:42,722 INFO L226 Difference]: Without dead ends: 244 [2021-12-16 05:55:42,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=1109, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 05:55:42,723 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 240 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:42,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 481 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 491 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2021-12-16 05:55:42,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-16 05:55:42,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 175. [2021-12-16 05:55:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 171 states have (on average 1.1403508771929824) internal successors, (195), 174 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 195 transitions. [2021-12-16 05:55:42,737 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 195 transitions. Word has length 75 [2021-12-16 05:55:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:42,737 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 195 transitions. [2021-12-16 05:55:42,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:42,738 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 195 transitions. [2021-12-16 05:55:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-16 05:55:42,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:42,738 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-12-16 05:55:42,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:42,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:42,955 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:42,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:42,956 INFO L85 PathProgramCache]: Analyzing trace with hash 683173057, now seen corresponding path program 1 times [2021-12-16 05:55:42,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:42,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222302914] [2021-12-16 05:55:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:42,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 88 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 05:55:43,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222302914] [2021-12-16 05:55:43,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222302914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876152434] [2021-12-16 05:55:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:43,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:43,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:43,051 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:43,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 05:55:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:43,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 05:55:43,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:43,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:55:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 05:55:43,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 05:55:43,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876152434] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:43,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:43,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2021-12-16 05:55:43,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574090797] [2021-12-16 05:55:43,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:43,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 05:55:43,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:43,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 05:55:43,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:55:43,548 INFO L87 Difference]: Start difference. First operand 175 states and 195 transitions. Second operand has 15 states, 14 states have (on average 7.285714285714286) internal successors, (102), 15 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:43,775 INFO L93 Difference]: Finished difference Result 223 states and 249 transitions. [2021-12-16 05:55:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 05:55:43,776 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 7.285714285714286) internal successors, (102), 15 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-16 05:55:43,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:43,776 INFO L225 Difference]: With dead ends: 223 [2021-12-16 05:55:43,776 INFO L226 Difference]: Without dead ends: 223 [2021-12-16 05:55:43,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-12-16 05:55:43,777 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 81 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:43,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 292 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:55:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-16 05:55:43,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 178. [2021-12-16 05:55:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 174 states have (on average 1.1379310344827587) internal successors, (198), 177 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 198 transitions. [2021-12-16 05:55:43,779 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 198 transitions. Word has length 76 [2021-12-16 05:55:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:43,780 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 198 transitions. [2021-12-16 05:55:43,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 7.285714285714286) internal successors, (102), 15 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:43,780 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 198 transitions. [2021-12-16 05:55:43,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-16 05:55:43,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:43,780 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-12-16 05:55:43,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:44,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:44,002 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:44,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:44,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1737117148, now seen corresponding path program 2 times [2021-12-16 05:55:44,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:44,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657089310] [2021-12-16 05:55:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:44,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 13 proven. 137 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 05:55:44,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:44,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657089310] [2021-12-16 05:55:44,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657089310] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:44,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789062528] [2021-12-16 05:55:44,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:55:44,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:44,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:44,077 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:44,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 05:55:44,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:55:44,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:44,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 05:55:44,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 05:55:44,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 05:55:44,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789062528] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:44,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:44,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2021-12-16 05:55:44,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237294371] [2021-12-16 05:55:44,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:44,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 05:55:44,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:44,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 05:55:44,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-16 05:55:44,411 INFO L87 Difference]: Start difference. First operand 178 states and 198 transitions. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:44,642 INFO L93 Difference]: Finished difference Result 208 states and 228 transitions. [2021-12-16 05:55:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 05:55:44,643 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-16 05:55:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:44,643 INFO L225 Difference]: With dead ends: 208 [2021-12-16 05:55:44,643 INFO L226 Difference]: Without dead ends: 208 [2021-12-16 05:55:44,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 05:55:44,644 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 343 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:44,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 269 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:44,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-16 05:55:44,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 176. [2021-12-16 05:55:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.122093023255814) internal successors, (193), 175 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 193 transitions. [2021-12-16 05:55:44,647 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 193 transitions. Word has length 80 [2021-12-16 05:55:44,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:44,647 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 193 transitions. [2021-12-16 05:55:44,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:44,647 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 193 transitions. [2021-12-16 05:55:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-16 05:55:44,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:44,647 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:44,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:44,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:44,866 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:44,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1014039297, now seen corresponding path program 1 times [2021-12-16 05:55:44,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:44,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550700884] [2021-12-16 05:55:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:44,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 101 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 05:55:44,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:44,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550700884] [2021-12-16 05:55:44,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550700884] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:44,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517812105] [2021-12-16 05:55:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:44,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:44,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:44,941 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:44,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 05:55:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:45,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 05:55:45,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 130 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 05:55:45,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 130 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 05:55:45,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517812105] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:45,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:45,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-16 05:55:45,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220953615] [2021-12-16 05:55:45,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:45,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 05:55:45,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:45,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 05:55:45,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-16 05:55:45,366 INFO L87 Difference]: Start difference. First operand 176 states and 193 transitions. Second operand has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:45,470 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2021-12-16 05:55:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 05:55:45,470 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-16 05:55:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:45,471 INFO L225 Difference]: With dead ends: 180 [2021-12-16 05:55:45,471 INFO L226 Difference]: Without dead ends: 180 [2021-12-16 05:55:45,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-12-16 05:55:45,472 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 73 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:45,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 307 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-16 05:55:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2021-12-16 05:55:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.1046511627906976) internal successors, (190), 175 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 190 transitions. [2021-12-16 05:55:45,476 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 190 transitions. Word has length 98 [2021-12-16 05:55:45,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:45,476 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 190 transitions. [2021-12-16 05:55:45,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 190 transitions. [2021-12-16 05:55:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-16 05:55:45,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:45,477 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:45,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:45,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-16 05:55:45,697 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:45,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:45,697 INFO L85 PathProgramCache]: Analyzing trace with hash -728466762, now seen corresponding path program 2 times [2021-12-16 05:55:45,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:45,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338743331] [2021-12-16 05:55:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:45,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 05:55:45,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:45,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338743331] [2021-12-16 05:55:45,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338743331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:45,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131153765] [2021-12-16 05:55:45,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:55:45,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:45,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:45,750 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:45,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 05:55:45,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:55:45,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:45,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 05:55:45,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 05:55:46,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 05:55:46,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131153765] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:46,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:46,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 18 [2021-12-16 05:55:46,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116931169] [2021-12-16 05:55:46,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:46,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 05:55:46,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 05:55:46,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-16 05:55:46,256 INFO L87 Difference]: Start difference. First operand 176 states and 190 transitions. Second operand has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:46,571 INFO L93 Difference]: Finished difference Result 201 states and 212 transitions. [2021-12-16 05:55:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 05:55:46,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-16 05:55:46,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:46,572 INFO L225 Difference]: With dead ends: 201 [2021-12-16 05:55:46,572 INFO L226 Difference]: Without dead ends: 201 [2021-12-16 05:55:46,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 05:55:46,573 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 408 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:46,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 360 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:46,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-16 05:55:46,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 188. [2021-12-16 05:55:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.0923913043478262) internal successors, (201), 187 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 201 transitions. [2021-12-16 05:55:46,575 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 201 transitions. Word has length 103 [2021-12-16 05:55:46,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:46,575 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 201 transitions. [2021-12-16 05:55:46,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:46,575 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 201 transitions. [2021-12-16 05:55:46,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-16 05:55:46,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:46,576 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1] [2021-12-16 05:55:46,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:46,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-16 05:55:46,784 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:46,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:46,784 INFO L85 PathProgramCache]: Analyzing trace with hash 141914171, now seen corresponding path program 3 times [2021-12-16 05:55:46,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:46,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626989314] [2021-12-16 05:55:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:46,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 152 proven. 201 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 05:55:46,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:46,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626989314] [2021-12-16 05:55:46,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626989314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:46,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3764603] [2021-12-16 05:55:46,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:55:46,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:46,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:46,990 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:46,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 05:55:47,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 05:55:47,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:47,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 05:55:47,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:47,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:47,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-16 05:55:47,254 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:55:47,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 05:55:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 137 proven. 3 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-12-16 05:55:47,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 128 proven. 12 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-12-16 05:55:48,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3764603] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:48,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:48,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2021-12-16 05:55:48,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127646946] [2021-12-16 05:55:48,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:48,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 05:55:48,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:48,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 05:55:48,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-12-16 05:55:48,053 INFO L87 Difference]: Start difference. First operand 188 states and 201 transitions. Second operand has 24 states, 23 states have (on average 6.391304347826087) internal successors, (147), 24 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:49,051 INFO L93 Difference]: Finished difference Result 251 states and 271 transitions. [2021-12-16 05:55:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-16 05:55:49,052 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.391304347826087) internal successors, (147), 24 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-12-16 05:55:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:49,053 INFO L225 Difference]: With dead ends: 251 [2021-12-16 05:55:49,053 INFO L226 Difference]: Without dead ends: 251 [2021-12-16 05:55:49,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=643, Invalid=2327, Unknown=0, NotChecked=0, Total=2970 [2021-12-16 05:55:49,054 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 323 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:49,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 487 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 600 Invalid, 0 Unknown, 143 Unchecked, 0.3s Time] [2021-12-16 05:55:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-16 05:55:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 187. [2021-12-16 05:55:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 184 states have (on average 1.0815217391304348) internal successors, (199), 186 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 199 transitions. [2021-12-16 05:55:49,057 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 199 transitions. Word has length 118 [2021-12-16 05:55:49,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:49,057 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 199 transitions. [2021-12-16 05:55:49,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.391304347826087) internal successors, (147), 24 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:49,058 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 199 transitions. [2021-12-16 05:55:49,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-16 05:55:49,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:49,058 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1] [2021-12-16 05:55:49,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:49,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:49,273 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:49,274 INFO L85 PathProgramCache]: Analyzing trace with hash 104371967, now seen corresponding path program 2 times [2021-12-16 05:55:49,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:49,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101146711] [2021-12-16 05:55:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:49,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 159 proven. 194 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-16 05:55:49,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:49,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101146711] [2021-12-16 05:55:49,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101146711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:49,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063145385] [2021-12-16 05:55:49,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:55:49,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:49,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:49,393 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:49,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-16 05:55:49,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 05:55:49,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:49,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 05:55:49,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:49,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:55:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-12-16 05:55:49,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-12-16 05:55:50,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063145385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:50,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:50,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 18 [2021-12-16 05:55:50,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835061121] [2021-12-16 05:55:50,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:50,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 05:55:50,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 05:55:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:55:50,057 INFO L87 Difference]: Start difference. First operand 187 states and 199 transitions. Second operand has 19 states, 18 states have (on average 8.555555555555555) internal successors, (154), 19 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:50,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:50,449 INFO L93 Difference]: Finished difference Result 234 states and 251 transitions. [2021-12-16 05:55:50,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 05:55:50,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 8.555555555555555) internal successors, (154), 19 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-16 05:55:50,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:50,450 INFO L225 Difference]: With dead ends: 234 [2021-12-16 05:55:50,450 INFO L226 Difference]: Without dead ends: 234 [2021-12-16 05:55:50,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=410, Invalid=1150, Unknown=0, NotChecked=0, Total=1560 [2021-12-16 05:55:50,451 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 98 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:50,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 314 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:50,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-16 05:55:50,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 182. [2021-12-16 05:55:50,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 180 states have (on average 1.0722222222222222) internal successors, (193), 181 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 193 transitions. [2021-12-16 05:55:50,473 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 193 transitions. Word has length 119 [2021-12-16 05:55:50,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:50,473 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 193 transitions. [2021-12-16 05:55:50,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 8.555555555555555) internal successors, (154), 19 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 193 transitions. [2021-12-16 05:55:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-16 05:55:50,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:50,475 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:50,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:50,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:50,691 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:50,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:50,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1334266660, now seen corresponding path program 3 times [2021-12-16 05:55:50,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:50,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039370440] [2021-12-16 05:55:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:50,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 290 proven. 176 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-16 05:55:50,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:50,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039370440] [2021-12-16 05:55:50,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039370440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:50,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180832493] [2021-12-16 05:55:50,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:55:50,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:50,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:50,814 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:50,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-16 05:55:50,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-16 05:55:50,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:50,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 05:55:50,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-12-16 05:55:51,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-12-16 05:55:51,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180832493] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:51,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:51,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2021-12-16 05:55:51,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155476098] [2021-12-16 05:55:51,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:51,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 05:55:51,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:51,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 05:55:51,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:55:51,454 INFO L87 Difference]: Start difference. First operand 182 states and 193 transitions. Second operand has 23 states, 23 states have (on average 8.434782608695652) internal successors, (194), 23 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:52,216 INFO L93 Difference]: Finished difference Result 267 states and 285 transitions. [2021-12-16 05:55:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-16 05:55:52,217 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 8.434782608695652) internal successors, (194), 23 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-12-16 05:55:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:52,217 INFO L225 Difference]: With dead ends: 267 [2021-12-16 05:55:52,217 INFO L226 Difference]: Without dead ends: 267 [2021-12-16 05:55:52,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=986, Invalid=2920, Unknown=0, NotChecked=0, Total=3906 [2021-12-16 05:55:52,218 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 786 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:52,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 315 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:55:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-16 05:55:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 258. [2021-12-16 05:55:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 256 states have (on average 1.08203125) internal successors, (277), 257 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 277 transitions. [2021-12-16 05:55:52,221 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 277 transitions. Word has length 145 [2021-12-16 05:55:52,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:52,221 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 277 transitions. [2021-12-16 05:55:52,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.434782608695652) internal successors, (194), 23 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:52,221 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 277 transitions. [2021-12-16 05:55:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-16 05:55:52,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:52,222 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 1, 1, 1] [2021-12-16 05:55:52,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:52,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:52,432 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:52,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:52,433 INFO L85 PathProgramCache]: Analyzing trace with hash -573618805, now seen corresponding path program 4 times [2021-12-16 05:55:52,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:52,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159992272] [2021-12-16 05:55:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:52,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 589 proven. 305 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-16 05:55:52,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:52,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159992272] [2021-12-16 05:55:52,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159992272] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:52,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7346416] [2021-12-16 05:55:52,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:55:52,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:52,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:52,568 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:52,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-16 05:55:54,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:55:54,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:54,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 05:55:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 692 proven. 31 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-12-16 05:55:54,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 692 proven. 31 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-12-16 05:55:54,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7346416] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:54,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:54,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2021-12-16 05:55:54,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459712689] [2021-12-16 05:55:54,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:54,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 05:55:54,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:54,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 05:55:54,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-12-16 05:55:54,618 INFO L87 Difference]: Start difference. First operand 258 states and 277 transitions. Second operand has 24 states, 24 states have (on average 7.583333333333333) internal successors, (182), 24 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:55,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:55,257 INFO L93 Difference]: Finished difference Result 279 states and 298 transitions. [2021-12-16 05:55:55,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-16 05:55:55,257 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.583333333333333) internal successors, (182), 24 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-12-16 05:55:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:55,258 INFO L225 Difference]: With dead ends: 279 [2021-12-16 05:55:55,258 INFO L226 Difference]: Without dead ends: 279 [2021-12-16 05:55:55,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 355 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=1741, Unknown=0, NotChecked=0, Total=2256 [2021-12-16 05:55:55,259 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 202 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:55,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 513 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 05:55:55,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-16 05:55:55,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 270. [2021-12-16 05:55:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 268 states have (on average 1.078358208955224) internal successors, (289), 269 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 289 transitions. [2021-12-16 05:55:55,262 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 289 transitions. Word has length 184 [2021-12-16 05:55:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:55,262 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 289 transitions. [2021-12-16 05:55:55,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.583333333333333) internal successors, (182), 24 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 289 transitions. [2021-12-16 05:55:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-16 05:55:55,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:55,263 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 1, 1, 1] [2021-12-16 05:55:55,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:55,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-16 05:55:55,463 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:55,463 INFO L85 PathProgramCache]: Analyzing trace with hash 170824235, now seen corresponding path program 5 times [2021-12-16 05:55:55,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:55,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288105825] [2021-12-16 05:55:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:55,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 670 proven. 334 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-16 05:55:55,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:55,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288105825] [2021-12-16 05:55:55,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288105825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:55,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325405512] [2021-12-16 05:55:55,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 05:55:55,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:55,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:55,597 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:55,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-16 05:55:57,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-16 05:55:57,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:57,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 05:55:57,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 727 proven. 277 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-16 05:55:57,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 740 proven. 264 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-16 05:55:57,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325405512] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:57,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:57,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2021-12-16 05:55:57,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361580226] [2021-12-16 05:55:57,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:57,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 05:55:57,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:57,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 05:55:57,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-12-16 05:55:57,757 INFO L87 Difference]: Start difference. First operand 270 states and 289 transitions. Second operand has 21 states, 21 states have (on average 8.095238095238095) internal successors, (170), 21 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:58,241 INFO L93 Difference]: Finished difference Result 279 states and 297 transitions. [2021-12-16 05:55:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 05:55:58,242 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.095238095238095) internal successors, (170), 21 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-12-16 05:55:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:58,243 INFO L225 Difference]: With dead ends: 279 [2021-12-16 05:55:58,243 INFO L226 Difference]: Without dead ends: 279 [2021-12-16 05:55:58,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 384 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=485, Invalid=1321, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 05:55:58,243 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 133 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:58,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 453 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:55:58,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-16 05:55:58,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 275. [2021-12-16 05:55:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 273 states have (on average 1.0732600732600732) internal successors, (293), 274 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 293 transitions. [2021-12-16 05:55:58,246 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 293 transitions. Word has length 192 [2021-12-16 05:55:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:58,247 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 293 transitions. [2021-12-16 05:55:58,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.095238095238095) internal successors, (170), 21 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 293 transitions. [2021-12-16 05:55:58,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-16 05:55:58,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:58,247 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 1, 1, 1] [2021-12-16 05:55:58,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:58,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-16 05:55:58,448 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:55:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:58,448 INFO L85 PathProgramCache]: Analyzing trace with hash 961774662, now seen corresponding path program 6 times [2021-12-16 05:55:58,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:58,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593198311] [2021-12-16 05:55:58,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:58,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 470 proven. 583 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-16 05:55:58,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:58,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593198311] [2021-12-16 05:55:58,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593198311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:58,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263052648] [2021-12-16 05:55:58,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 05:55:58,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:58,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:58,621 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:55:58,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-16 05:55:59,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-16 05:55:59,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:59,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 05:55:59,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 651 proven. 225 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-16 05:55:59,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 664 proven. 212 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-16 05:55:59,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263052648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:59,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:59,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2021-12-16 05:55:59,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881483598] [2021-12-16 05:55:59,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:59,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 05:55:59,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:59,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 05:55:59,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 05:55:59,865 INFO L87 Difference]: Start difference. First operand 275 states and 293 transitions. Second operand has 34 states, 34 states have (on average 6.5588235294117645) internal successors, (223), 34 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:56:00,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:56:00,748 INFO L93 Difference]: Finished difference Result 457 states and 486 transitions. [2021-12-16 05:56:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-16 05:56:00,749 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.5588235294117645) internal successors, (223), 34 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-12-16 05:56:00,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:56:00,750 INFO L225 Difference]: With dead ends: 457 [2021-12-16 05:56:00,750 INFO L226 Difference]: Without dead ends: 457 [2021-12-16 05:56:00,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 373 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1123, Invalid=4133, Unknown=0, NotChecked=0, Total=5256 [2021-12-16 05:56:00,751 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 261 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:56:00,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 402 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:56:00,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-12-16 05:56:00,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 396. [2021-12-16 05:56:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 394 states have (on average 1.0685279187817258) internal successors, (421), 395 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:56:00,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 421 transitions. [2021-12-16 05:56:00,755 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 421 transitions. Word has length 197 [2021-12-16 05:56:00,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:56:00,755 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 421 transitions. [2021-12-16 05:56:00,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.5588235294117645) internal successors, (223), 34 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:56:00,755 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 421 transitions. [2021-12-16 05:56:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-16 05:56:00,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:56:00,756 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 1, 1, 1] [2021-12-16 05:56:00,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-16 05:56:00,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-16 05:56:00,967 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-16 05:56:00,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:56:00,968 INFO L85 PathProgramCache]: Analyzing trace with hash 309236233, now seen corresponding path program 7 times [2021-12-16 05:56:00,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:56:00,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793380225] [2021-12-16 05:56:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:56:00,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:56:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:56:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 1115 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-16 05:56:01,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:56:01,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793380225] [2021-12-16 05:56:01,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793380225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:56:01,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267563392] [2021-12-16 05:56:01,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 05:56:01,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:56:01,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:56:01,708 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:56:01,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-16 05:56:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:56:01,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-16 05:56:01,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:56:01,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:56:01,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:56:01,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:56:01,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 05:56:01,953 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:56:01,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 05:56:02,044 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:56:02,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-16 05:56:02,054 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:56:02,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 05:56:02,199 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:56:02,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 05:56:02,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 05:56:02,388 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:56:02,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-16 05:56:02,400 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:56:02,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 05:56:02,637 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:56:02,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-16 05:56:02,661 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:56:02,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 05:56:02,930 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:56:02,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-16 05:56:02,940 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:56:02,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 05:56:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 1070 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-16 05:56:03,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:56:03,448 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:56:03,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-16 05:56:04,663 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:56:04,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12