./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/960521-1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/960521-1-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4591ef5e575ce80e216cc4837705a7c6f141a943d9af6ca1eb606ab877abd06b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:49:49,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:49:49,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:49:49,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:49:49,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:49:49,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:49:49,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:49:49,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:49:49,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:49:49,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:49:49,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:49:49,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:49:49,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:49:49,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:49:49,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:49:49,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:49:49,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:49:49,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:49:49,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:49:49,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:49:49,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:49:49,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:49:49,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:49:49,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:49:49,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:49:49,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:49:49,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:49:49,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:49:49,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:49:49,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:49:49,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:49:49,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:49:49,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:49:49,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:49:49,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:49:49,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:49:49,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:49:49,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:49:49,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:49:49,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:49:49,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:49:49,447 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 05:49:49,478 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:49:49,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:49:49,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:49:49,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:49:49,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:49:49,480 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:49:49,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:49:49,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:49:49,481 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:49:49,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:49:49,482 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:49:49,482 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:49:49,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:49:49,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:49:49,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:49:49,483 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:49:49,483 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:49:49,483 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:49:49,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:49:49,483 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:49:49,484 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:49:49,484 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:49:49,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:49:49,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:49:49,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:49:49,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:49:49,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:49:49,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:49:49,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:49:49,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:49:49,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:49:49,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4591ef5e575ce80e216cc4837705a7c6f141a943d9af6ca1eb606ab877abd06b [2021-12-16 05:49:49,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:49:49,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:49:49,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:49:49,732 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:49:49,732 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:49:49,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-1.i [2021-12-16 05:49:49,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f1f6c614/b238de3890dc4cb396d0de55e22fa6ab/FLAG2de9c6db0 [2021-12-16 05:49:50,279 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:49:50,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-1.i [2021-12-16 05:49:50,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f1f6c614/b238de3890dc4cb396d0de55e22fa6ab/FLAG2de9c6db0 [2021-12-16 05:49:50,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f1f6c614/b238de3890dc4cb396d0de55e22fa6ab [2021-12-16 05:49:50,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:49:50,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:49:50,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:49:50,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:49:50,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:49:50,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:49:50" (1/1) ... [2021-12-16 05:49:50,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@605d4f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:50, skipping insertion in model container [2021-12-16 05:49:50,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:49:50" (1/1) ... [2021-12-16 05:49:50,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:49:50,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:49:51,117 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:49:51,126 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:49:51,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:49:51,206 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:49:51,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:51 WrapperNode [2021-12-16 05:49:51,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:49:51,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:49:51,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:49:51,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:49:51,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:51" (1/1) ... [2021-12-16 05:49:51,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:51" (1/1) ... [2021-12-16 05:49:51,268 INFO L137 Inliner]: procedures = 121, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2021-12-16 05:49:51,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:49:51,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:49:51,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:49:51,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:49:51,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:51" (1/1) ... [2021-12-16 05:49:51,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:51" (1/1) ... [2021-12-16 05:49:51,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:51" (1/1) ... [2021-12-16 05:49:51,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:51" (1/1) ... [2021-12-16 05:49:51,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:51" (1/1) ... [2021-12-16 05:49:51,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:51" (1/1) ... [2021-12-16 05:49:51,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:51" (1/1) ... [2021-12-16 05:49:51,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:49:51,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:49:51,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:49:51,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:49:51,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:51" (1/1) ... [2021-12-16 05:49:51,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:49:51,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:51,349 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 05:49:51,380 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 05:49:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 05:49:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 05:49:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 05:49:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 05:49:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:49:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 05:49:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:49:51,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:49:51,492 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:49:51,493 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:49:51,658 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:49:51,664 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:49:51,679 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 05:49:51,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:49:51 BoogieIcfgContainer [2021-12-16 05:49:51,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:49:51,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:49:51,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:49:51,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:49:51,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:49:50" (1/3) ... [2021-12-16 05:49:51,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a5a0f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:49:51, skipping insertion in model container [2021-12-16 05:49:51,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:49:51" (2/3) ... [2021-12-16 05:49:51,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a5a0f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:49:51, skipping insertion in model container [2021-12-16 05:49:51,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:49:51" (3/3) ... [2021-12-16 05:49:51,689 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1-1.i [2021-12-16 05:49:51,693 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:49:51,694 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-12-16 05:49:51,750 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:49:51,759 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 05:49:51,760 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-12-16 05:49:51,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 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 05:49:51,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 05:49:51,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:51,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 05:49:51,798 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:49:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:51,803 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-16 05:49:51,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:51,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127023494] [2021-12-16 05:49:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:51,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:52,026 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 05:49:52,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:52,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127023494] [2021-12-16 05:49:52,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127023494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:52,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:52,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:49:52,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775030220] [2021-12-16 05:49:52,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:52,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:49:52,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:52,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:49:52,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:49:52,066 INFO L87 Difference]: Start difference. First operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 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) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 05:49:52,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:52,125 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-12-16 05:49:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:49:52,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-16 05:49:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:52,135 INFO L225 Difference]: With dead ends: 50 [2021-12-16 05:49:52,135 INFO L226 Difference]: Without dead ends: 48 [2021-12-16 05:49:52,138 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 05:49:52,141 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:52,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:49:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-16 05:49:52,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-16 05:49:52,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 47 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 05:49:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-12-16 05:49:52,172 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 3 [2021-12-16 05:49:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:52,173 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-12-16 05:49:52,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 05:49:52,173 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-12-16 05:49:52,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-16 05:49:52,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:52,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-16 05:49:52,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 05:49:52,175 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:49:52,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:52,175 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-16 05:49:52,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:52,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606849845] [2021-12-16 05:49:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:52,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:52,226 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 05:49:52,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:52,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606849845] [2021-12-16 05:49:52,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606849845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:52,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:52,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:49:52,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102065916] [2021-12-16 05:49:52,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:52,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:49:52,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:52,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:49:52,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:49:52,231 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 05:49:52,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:52,256 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-12-16 05:49:52,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:49:52,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-16 05:49:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:52,258 INFO L225 Difference]: With dead ends: 47 [2021-12-16 05:49:52,259 INFO L226 Difference]: Without dead ends: 47 [2021-12-16 05:49:52,259 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 05:49:52,261 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:52,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 87 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:49:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-16 05:49:52,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-16 05:49:52,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.75) internal successors, (49), 46 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 05:49:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-12-16 05:49:52,274 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2021-12-16 05:49:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:52,275 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-12-16 05:49:52,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 05:49:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-12-16 05:49:52,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 05:49:52,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:52,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 05:49:52,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 05:49:52,279 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:49:52,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:52,280 INFO L85 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2021-12-16 05:49:52,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:52,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598529944] [2021-12-16 05:49:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:52,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:52,341 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 05:49:52,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:52,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598529944] [2021-12-16 05:49:52,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598529944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:52,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:52,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:49:52,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131907719] [2021-12-16 05:49:52,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:52,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:49:52,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:52,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:49:52,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:49:52,344 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:52,379 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-12-16 05:49:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:49:52,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 05:49:52,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:52,381 INFO L225 Difference]: With dead ends: 44 [2021-12-16 05:49:52,381 INFO L226 Difference]: Without dead ends: 44 [2021-12-16 05:49:52,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:49:52,382 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:52,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:49:52,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-16 05:49:52,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-16 05:49:52,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 43 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 05:49:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-12-16 05:49:52,388 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2021-12-16 05:49:52,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:52,388 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-12-16 05:49:52,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-12-16 05:49:52,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 05:49:52,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:52,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 05:49:52,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 05:49:52,390 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:49:52,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2021-12-16 05:49:52,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:52,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558133060] [2021-12-16 05:49:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:52,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:52,479 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 05:49:52,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:52,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558133060] [2021-12-16 05:49:52,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558133060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:52,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:52,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:49:52,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126540380] [2021-12-16 05:49:52,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:52,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:49:52,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:52,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:49:52,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:49:52,482 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:52,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:52,577 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2021-12-16 05:49:52,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:49:52,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 05:49:52,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:52,578 INFO L225 Difference]: With dead ends: 51 [2021-12-16 05:49:52,578 INFO L226 Difference]: Without dead ends: 51 [2021-12-16 05:49:52,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:49:52,580 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 56 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:52,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 64 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:49:52,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-16 05:49:52,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-12-16 05:49:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 44 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 05:49:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-12-16 05:49:52,585 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 6 [2021-12-16 05:49:52,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:52,585 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-12-16 05:49:52,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:52,586 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-12-16 05:49:52,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 05:49:52,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:52,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:52,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 05:49:52,587 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:49:52,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:52,588 INFO L85 PathProgramCache]: Analyzing trace with hash 59362067, now seen corresponding path program 1 times [2021-12-16 05:49:52,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:52,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456338647] [2021-12-16 05:49:52,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:52,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:52,625 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 05:49:52,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:52,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456338647] [2021-12-16 05:49:52,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456338647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:52,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:52,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:49:52,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863822545] [2021-12-16 05:49:52,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:52,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:49:52,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:52,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:49:52,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:49:52,633 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:52,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:52,686 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-12-16 05:49:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:49:52,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-16 05:49:52,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:52,687 INFO L225 Difference]: With dead ends: 50 [2021-12-16 05:49:52,687 INFO L226 Difference]: Without dead ends: 50 [2021-12-16 05:49:52,687 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 05:49:52,688 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 53 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:52,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 66 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:49:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-16 05:49:52,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-12-16 05:49:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-12-16 05:49:52,708 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 8 [2021-12-16 05:49:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:52,708 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-12-16 05:49:52,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-12-16 05:49:52,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 05:49:52,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:52,710 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:52,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 05:49:52,710 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:49:52,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2021-12-16 05:49:52,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:52,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279363674] [2021-12-16 05:49:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:52,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:52,900 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 05:49:52,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279363674] [2021-12-16 05:49:52,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279363674] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779639160] [2021-12-16 05:49:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:52,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:52,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:52,907 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 05:49:52,914 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 05:49:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:52,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 05:49:52,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:53,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:49:53,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-16 05:49:53,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 05:49:53,179 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 05:49:53,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:53,319 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 05:49:53,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779639160] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:53,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:53,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2021-12-16 05:49:53,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925632984] [2021-12-16 05:49:53,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:53,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 05:49:53,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:53,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 05:49:53,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:49:53,324 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:53,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:53,575 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2021-12-16 05:49:53,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:49:53,576 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-16 05:49:53,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:53,577 INFO L225 Difference]: With dead ends: 92 [2021-12-16 05:49:53,577 INFO L226 Difference]: Without dead ends: 92 [2021-12-16 05:49:53,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:49:53,578 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 292 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:53,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 137 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:49:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-16 05:49:53,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 57. [2021-12-16 05:49:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 56 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 05:49:53,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-12-16 05:49:53,597 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 9 [2021-12-16 05:49:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:53,598 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-12-16 05:49:53,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:53,598 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-12-16 05:49:53,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 05:49:53,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:53,598 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2021-12-16 05:49:53,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:53,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 05:49:53,808 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:49:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:53,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1941957673, now seen corresponding path program 2 times [2021-12-16 05:49:53,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:53,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982026738] [2021-12-16 05:49:53,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:53,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:54,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:54,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982026738] [2021-12-16 05:49:54,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982026738] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:54,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176683793] [2021-12-16 05:49:54,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:49:54,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:54,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:54,044 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 05:49:54,045 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 05:49:54,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:49:54,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:49:54,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 05:49:54,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:54,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:49:54,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-16 05:49:54,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 05:49:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:54,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:54,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176683793] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:54,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:54,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2021-12-16 05:49:54,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097858059] [2021-12-16 05:49:54,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:54,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 05:49:54,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:54,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 05:49:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-12-16 05:49:54,582 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 21 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 05:49:55,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:55,244 INFO L93 Difference]: Finished difference Result 224 states and 230 transitions. [2021-12-16 05:49:55,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 05:49:55,245 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 21 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) Word has length 18 [2021-12-16 05:49:55,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:55,247 INFO L225 Difference]: With dead ends: 224 [2021-12-16 05:49:55,247 INFO L226 Difference]: Without dead ends: 224 [2021-12-16 05:49:55,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2021-12-16 05:49:55,248 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 766 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:55,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 300 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 05:49:55,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-16 05:49:55,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 84. [2021-12-16 05:49:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 70 states have (on average 1.3428571428571427) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 05:49:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-12-16 05:49:55,257 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 18 [2021-12-16 05:49:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:55,257 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-12-16 05:49:55,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 21 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 05:49:55,258 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-12-16 05:49:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-16 05:49:55,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:55,259 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1] [2021-12-16 05:49:55,286 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 05:49:55,486 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,SelfDestructingSolverStorable6 [2021-12-16 05:49:55,487 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:49:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash 820795113, now seen corresponding path program 3 times [2021-12-16 05:49:55,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:55,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981318748] [2021-12-16 05:49:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:55,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:55,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:55,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981318748] [2021-12-16 05:49:55,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981318748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:55,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582737420] [2021-12-16 05:49:55,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:49:55,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:55,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:55,908 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 05:49:55,936 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 05:49:55,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 05:49:55,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:49:55,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 05:49:55,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:55,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:49:55,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-16 05:49:56,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 05:49:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-16 05:49:56,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-16 05:49:56,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582737420] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:56,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:56,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 22 [2021-12-16 05:49:56,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282760334] [2021-12-16 05:49:56,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:56,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 05:49:56,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:56,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 05:49:56,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:49:56,637 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:57,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:57,430 INFO L93 Difference]: Finished difference Result 327 states and 336 transitions. [2021-12-16 05:49:57,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 05:49:57,431 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-16 05:49:57,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:57,432 INFO L225 Difference]: With dead ends: 327 [2021-12-16 05:49:57,432 INFO L226 Difference]: Without dead ends: 327 [2021-12-16 05:49:57,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2021-12-16 05:49:57,434 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1788 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1788 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:57,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1788 Valid, 368 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 05:49:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-16 05:49:57,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 88. [2021-12-16 05:49:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 75 states have (on average 1.3066666666666666) internal successors, (98), 87 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 05:49:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-12-16 05:49:57,443 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 36 [2021-12-16 05:49:57,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:57,443 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-12-16 05:49:57,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-12-16 05:49:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 05:49:57,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:57,445 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:57,466 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 05:49:57,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:57,660 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:49:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:57,660 INFO L85 PathProgramCache]: Analyzing trace with hash 15618195, now seen corresponding path program 1 times [2021-12-16 05:49:57,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:57,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009999779] [2021-12-16 05:49:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:57,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-16 05:49:57,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:57,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009999779] [2021-12-16 05:49:57,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009999779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:57,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:57,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:49:57,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293930163] [2021-12-16 05:49:57,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:57,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:49:57,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:57,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:49:57,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:49:57,716 INFO L87 Difference]: Start difference. First operand 88 states and 98 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 05:49:57,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:57,751 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2021-12-16 05:49:57,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:49:57,751 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 44 [2021-12-16 05:49:57,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:57,753 INFO L225 Difference]: With dead ends: 86 [2021-12-16 05:49:57,753 INFO L226 Difference]: Without dead ends: 86 [2021-12-16 05:49:57,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:49:57,754 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:57,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 59 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:49:57,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-16 05:49:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-16 05:49:57,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 85 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 05:49:57,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2021-12-16 05:49:57,760 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 44 [2021-12-16 05:49:57,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:57,761 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2021-12-16 05:49:57,761 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 05:49:57,761 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2021-12-16 05:49:57,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 05:49:57,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:57,762 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:57,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 05:49:57,762 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:49:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:57,763 INFO L85 PathProgramCache]: Analyzing trace with hash 15618196, now seen corresponding path program 1 times [2021-12-16 05:49:57,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:57,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240149262] [2021-12-16 05:49:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:57,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:57,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:57,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240149262] [2021-12-16 05:49:57,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240149262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:57,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926689038] [2021-12-16 05:49:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:57,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:57,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:57,944 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 05:49:57,970 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 05:49:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:58,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 05:49:58,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:58,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:58,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926689038] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:58,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:58,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2021-12-16 05:49:58,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508457716] [2021-12-16 05:49:58,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:58,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-16 05:49:58,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:58,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-16 05:49:58,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=1019, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 05:49:58,700 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 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 05:49:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:59,221 INFO L93 Difference]: Finished difference Result 536 states and 550 transitions. [2021-12-16 05:49:59,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 05:49:59,222 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 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) Word has length 44 [2021-12-16 05:49:59,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:59,224 INFO L225 Difference]: With dead ends: 536 [2021-12-16 05:49:59,225 INFO L226 Difference]: Without dead ends: 536 [2021-12-16 05:49:59,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1190, Invalid=1890, Unknown=0, NotChecked=0, Total=3080 [2021-12-16 05:49:59,226 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1606 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1606 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:59,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1606 Valid, 415 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:49:59,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-12-16 05:49:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 152. [2021-12-16 05:49:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 141 states have (on average 1.177304964539007) internal successors, (166), 151 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 05:49:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2021-12-16 05:49:59,235 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 44 [2021-12-16 05:49:59,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:59,235 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2021-12-16 05:49:59,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 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 05:49:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2021-12-16 05:49:59,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-16 05:49:59,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:59,238 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:59,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-16 05:49:59,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:59,456 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:49:59,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:59,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1639898028, now seen corresponding path program 2 times [2021-12-16 05:49:59,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:59,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129883958] [2021-12-16 05:49:59,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:59,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:59,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:59,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129883958] [2021-12-16 05:49:59,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129883958] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:59,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260454499] [2021-12-16 05:49:59,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:49:59,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:59,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:59,928 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 05:49:59,929 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 05:50:00,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 05:50:00,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:50:00,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 05:50:00,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:50:00,040 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:50:00,040 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-16 05:50:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2021-12-16 05:50:00,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:50:00,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260454499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:50:00,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:50:00,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [30] total 32 [2021-12-16 05:50:00,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436501955] [2021-12-16 05:50:00,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:50:00,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:50:00,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:50:00,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:50:00,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2021-12-16 05:50:00,434 INFO L87 Difference]: Start difference. First operand 152 states and 166 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 05:50:00,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:50:00,467 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2021-12-16 05:50:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:50:00,468 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 86 [2021-12-16 05:50:00,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:50:00,471 INFO L225 Difference]: With dead ends: 140 [2021-12-16 05:50:00,471 INFO L226 Difference]: Without dead ends: 140 [2021-12-16 05:50:00,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2021-12-16 05:50:00,473 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:50:00,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:50:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-16 05:50:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-12-16 05:50:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.125925925925926) internal successors, (152), 139 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 05:50:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2021-12-16 05:50:00,484 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 86 [2021-12-16 05:50:00,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:50:00,486 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2021-12-16 05:50:00,486 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 05:50:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2021-12-16 05:50:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-16 05:50:00,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:50:00,490 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:50:00,515 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 05:50:00,711 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,SelfDestructingSolverStorable10 [2021-12-16 05:50:00,711 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:50:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:50:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1050815861, now seen corresponding path program 1 times [2021-12-16 05:50:00,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:50:00,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596774154] [2021-12-16 05:50:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:50:00,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:50:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:50:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:50:01,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:50:01,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596774154] [2021-12-16 05:50:01,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596774154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:50:01,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527800259] [2021-12-16 05:50:01,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:50:01,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:50:01,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:50:01,150 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 05:50:01,159 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 05:50:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:50:01,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 05:50:01,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:50:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:50:02,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:50:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:50:03,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527800259] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:50:03,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:50:03,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 85 [2021-12-16 05:50:03,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146646824] [2021-12-16 05:50:03,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:50:03,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-16 05:50:03,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:50:03,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-16 05:50:03,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3139, Invalid=4001, Unknown=0, NotChecked=0, Total=7140 [2021-12-16 05:50:03,104 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 85 states, 85 states have (on average 2.9411764705882355) internal successors, (250), 85 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 05:50:04,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:50:04,776 INFO L93 Difference]: Finished difference Result 785 states and 786 transitions. [2021-12-16 05:50:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-16 05:50:04,776 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.9411764705882355) internal successors, (250), 85 states have internal predecessors, (250), 0 states have call successors, (0), 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 89 [2021-12-16 05:50:04,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:50:04,779 INFO L225 Difference]: With dead ends: 785 [2021-12-16 05:50:04,779 INFO L226 Difference]: Without dead ends: 785 [2021-12-16 05:50:04,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4425 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4732, Invalid=7700, Unknown=0, NotChecked=0, Total=12432 [2021-12-16 05:50:04,784 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 2408 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2408 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:50:04,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2408 Valid, 473 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 05:50:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-12-16 05:50:04,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 266. [2021-12-16 05:50:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.1187739463601531) internal successors, (292), 265 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 05:50:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 292 transitions. [2021-12-16 05:50:04,792 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 292 transitions. Word has length 89 [2021-12-16 05:50:04,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:50:04,793 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 292 transitions. [2021-12-16 05:50:04,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.9411764705882355) internal successors, (250), 85 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 05:50:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 292 transitions. [2021-12-16 05:50:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-16 05:50:04,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:50:04,795 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:50:04,827 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 05:50:05,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:50:05,015 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:50:05,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:50:05,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1332910603, now seen corresponding path program 2 times [2021-12-16 05:50:05,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:50:05,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336148452] [2021-12-16 05:50:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:50:05,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:50:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:50:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4349 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:50:06,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:50:06,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336148452] [2021-12-16 05:50:06,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336148452] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:50:06,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380391792] [2021-12-16 05:50:06,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:50:06,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:50:06,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:50:06,456 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 05:50:06,458 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 05:50:06,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:50:06,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:50:06,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-16 05:50:06,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:50:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4349 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:50:08,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:50:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4349 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:50:11,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380391792] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:50:11,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:50:11,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 169 [2021-12-16 05:50:11,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137662196] [2021-12-16 05:50:11,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:50:11,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2021-12-16 05:50:11,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:50:11,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2021-12-16 05:50:11,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12547, Invalid=15845, Unknown=0, NotChecked=0, Total=28392 [2021-12-16 05:50:11,858 INFO L87 Difference]: Start difference. First operand 266 states and 292 transitions. Second operand has 169 states, 169 states have (on average 2.970414201183432) internal successors, (502), 169 states have internal predecessors, (502), 0 states have call successors, (0), 0 states 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 05:50:18,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:50:18,746 INFO L93 Difference]: Finished difference Result 1597 states and 1598 transitions. [2021-12-16 05:50:18,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-12-16 05:50:18,747 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.970414201183432) internal successors, (502), 169 states have internal predecessors, (502), 0 states have call successors, (0), 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 173 [2021-12-16 05:50:18,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:50:18,753 INFO L225 Difference]: With dead ends: 1597 [2021-12-16 05:50:18,753 INFO L226 Difference]: Without dead ends: 1597 [2021-12-16 05:50:18,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18257 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=18872, Invalid=31080, Unknown=0, NotChecked=0, Total=49952 [2021-12-16 05:50:18,764 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 6664 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6664 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:50:18,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6664 Valid, 819 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [847 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-16 05:50:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-12-16 05:50:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 518. [2021-12-16 05:50:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 513 states have (on average 1.115009746588694) internal successors, (572), 517 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 05:50:18,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 572 transitions. [2021-12-16 05:50:18,777 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 572 transitions. Word has length 173 [2021-12-16 05:50:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:50:18,778 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 572 transitions. [2021-12-16 05:50:18,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.970414201183432) internal successors, (502), 169 states have internal predecessors, (502), 0 states have call successors, (0), 0 states 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 05:50:18,778 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 572 transitions. [2021-12-16 05:50:18,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-12-16 05:50:18,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:50:18,781 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:50:18,805 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 05:50:18,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:50:18,995 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:50:18,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:50:18,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1249634571, now seen corresponding path program 3 times [2021-12-16 05:50:18,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:50:18,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059598821] [2021-12-16 05:50:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:50:18,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:50:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:50:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18097 backedges. 0 proven. 18095 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:50:23,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:50:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059598821] [2021-12-16 05:50:23,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059598821] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:50:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999112234] [2021-12-16 05:50:23,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:50:23,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:50:23,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:50:23,681 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 05:50:23,682 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 05:50:23,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 05:50:23,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:50:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 05:50:23,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:50:23,857 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:50:23,857 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-16 05:50:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18097 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18095 trivial. 0 not checked. [2021-12-16 05:50:25,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:50:25,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999112234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:50:25,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:50:25,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [114] total 118 [2021-12-16 05:50:25,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204288797] [2021-12-16 05:50:25,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:50:25,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:50:25,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:50:25,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:50:25,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6345, Invalid=7461, Unknown=0, NotChecked=0, Total=13806 [2021-12-16 05:50:25,654 INFO L87 Difference]: Start difference. First operand 518 states and 572 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:50:25,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:50:25,694 INFO L93 Difference]: Finished difference Result 517 states and 518 transitions. [2021-12-16 05:50:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:50:25,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 341 [2021-12-16 05:50:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:50:25,696 INFO L225 Difference]: With dead ends: 517 [2021-12-16 05:50:25,697 INFO L226 Difference]: Without dead ends: 517 [2021-12-16 05:50:25,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6345, Invalid=7461, Unknown=0, NotChecked=0, Total=13806 [2021-12-16 05:50:25,698 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 26 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 05:50:25,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 26 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:50:25,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-12-16 05:50:25,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2021-12-16 05:50:25,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 513 states have (on average 1.0097465886939572) internal successors, (518), 516 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 05:50:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 518 transitions. [2021-12-16 05:50:25,706 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 518 transitions. Word has length 341 [2021-12-16 05:50:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:50:25,707 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 518 transitions. [2021-12-16 05:50:25,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:50:25,707 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 518 transitions. [2021-12-16 05:50:25,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-12-16 05:50:25,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:50:25,714 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:50:25,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 05:50:25,936 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,SelfDestructingSolverStorable13 [2021-12-16 05:50:25,937 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:50:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:50:25,937 INFO L85 PathProgramCache]: Analyzing trace with hash 459933265, now seen corresponding path program 1 times [2021-12-16 05:50:25,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:50:25,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181795986] [2021-12-16 05:50:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:50:25,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:50:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:50:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 22605 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22605 trivial. 0 not checked. [2021-12-16 05:50:26,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:50:26,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181795986] [2021-12-16 05:50:26,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181795986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:50:26,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:50:26,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:50:26,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681115026] [2021-12-16 05:50:26,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:50:26,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:50:26,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:50:26,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:50:26,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:50:26,206 INFO L87 Difference]: Start difference. First operand 517 states and 518 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 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 05:50:26,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:50:26,215 INFO L93 Difference]: Finished difference Result 515 states and 516 transitions. [2021-12-16 05:50:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:50:26,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 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 507 [2021-12-16 05:50:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:50:26,217 INFO L225 Difference]: With dead ends: 515 [2021-12-16 05:50:26,217 INFO L226 Difference]: Without dead ends: 515 [2021-12-16 05:50:26,219 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 05:50:26,220 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:50:26,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:50:26,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-12-16 05:50:26,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2021-12-16 05:50:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 513 states have (on average 1.0058479532163742) internal successors, (516), 514 states have internal predecessors, (516), 0 states have call successors, (0), 0 states 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 05:50:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 516 transitions. [2021-12-16 05:50:26,228 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 516 transitions. Word has length 507 [2021-12-16 05:50:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:50:26,228 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 516 transitions. [2021-12-16 05:50:26,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 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 05:50:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 516 transitions. [2021-12-16 05:50:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2021-12-16 05:50:26,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:50:26,237 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:50:26,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 05:50:26,237 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:50:26,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:50:26,238 INFO L85 PathProgramCache]: Analyzing trace with hash -385760749, now seen corresponding path program 1 times [2021-12-16 05:50:26,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:50:26,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533148349] [2021-12-16 05:50:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:50:26,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:50:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:50:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 22605 backedges. 0 proven. 18095 refuted. 0 times theorem prover too weak. 4510 trivial. 0 not checked. [2021-12-16 05:50:30,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:50:30,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533148349] [2021-12-16 05:50:30,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533148349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:50:30,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747947843] [2021-12-16 05:50:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:50:30,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:50:30,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:50:30,916 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 05:50:30,939 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 05:50:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:50:31,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1908 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-16 05:50:31,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:50:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 22605 backedges. 0 proven. 18095 refuted. 0 times theorem prover too weak. 4510 trivial. 0 not checked. [2021-12-16 05:50:37,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:50:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 22605 backedges. 0 proven. 18095 refuted. 0 times theorem prover too weak. 4510 trivial. 0 not checked. [2021-12-16 05:50:39,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747947843] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:50:39,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:50:39,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114, 114] total 243 [2021-12-16 05:50:39,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798599106] [2021-12-16 05:50:39,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:50:39,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 243 states [2021-12-16 05:50:39,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:50:39,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2021-12-16 05:50:39,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23154, Invalid=35652, Unknown=0, NotChecked=0, Total=58806 [2021-12-16 05:50:39,710 INFO L87 Difference]: Start difference. First operand 515 states and 516 transitions. Second operand has 243 states, 243 states have (on average 3.0205761316872426) internal successors, (734), 243 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 05:50:47,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:50:47,522 INFO L93 Difference]: Finished difference Result 993 states and 994 transitions. [2021-12-16 05:50:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-12-16 05:50:47,528 INFO L78 Accepts]: Start accepts. Automaton has has 243 states, 243 states have (on average 3.0205761316872426) internal successors, (734), 243 states have internal predecessors, (734), 0 states have call successors, (0), 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 509 [2021-12-16 05:50:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:50:47,532 INFO L225 Difference]: With dead ends: 993 [2021-12-16 05:50:47,532 INFO L226 Difference]: Without dead ends: 993 [2021-12-16 05:50:47,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1147 GetRequests, 888 SyntacticMatches, 1 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30957 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=25415, Invalid=41925, Unknown=0, NotChecked=0, Total=67340 [2021-12-16 05:50:47,536 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2570 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 952 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2570 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:50:47,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2570 Valid, 274 Invalid, 2131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [952 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 05:50:47,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-12-16 05:50:47,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 737. [2021-12-16 05:50:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 735 states have (on average 1.0040816326530613) internal successors, (738), 736 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 05:50:47,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 738 transitions. [2021-12-16 05:50:47,551 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 738 transitions. Word has length 509 [2021-12-16 05:50:47,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:50:47,552 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 738 transitions. [2021-12-16 05:50:47,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 243 states, 243 states have (on average 3.0205761316872426) internal successors, (734), 243 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 05:50:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 738 transitions. [2021-12-16 05:50:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2021-12-16 05:50:47,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:50:47,568 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:50:47,597 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 05:50:47,783 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,SelfDestructingSolverStorable15 [2021-12-16 05:50:47,784 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-16 05:50:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:50:47,784 INFO L85 PathProgramCache]: Analyzing trace with hash -908632237, now seen corresponding path program 2 times [2021-12-16 05:50:47,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:50:47,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760492191] [2021-12-16 05:50:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:50:47,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:50:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat