/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 17:25:57,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 17:25:57,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 17:25:57,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-08 17:25:57,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-08 17:25:57,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-08 17:25:57,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-08 17:25:57,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-08 17:25:57,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-08 17:25:57,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-08 17:25:57,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-08 17:25:57,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-08 17:25:57,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-08 17:25:57,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-08 17:25:57,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-08 17:25:57,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-08 17:25:57,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-08 17:25:57,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-08 17:25:57,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-08 17:25:57,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-08 17:25:57,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-08 17:25:57,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-08 17:25:57,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-08 17:25:57,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-08 17:25:57,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-08 17:25:57,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-08 17:25:57,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-08 17:25:57,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-08 17:25:57,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-08 17:25:57,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-08 17:25:57,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-08 17:25:57,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-08 17:25:57,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-08 17:25:57,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 17:25:57,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 17:25:57,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 17:25:57,802 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-08 17:25:57,835 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 17:25:57,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 17:25:57,835 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 17:25:57,836 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 17:25:57,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 17:25:57,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 17:25:57,837 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 17:25:57,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 17:25:57,838 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 17:25:57,838 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-08 17:25:57,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 17:25:57,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 17:25:57,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 17:25:57,840 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-08 17:25:57,840 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-08 17:25:57,840 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-08 17:25:57,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 17:25:57,841 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-08 17:25:57,841 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-08 17:25:57,841 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-08 17:25:57,841 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 17:25:57,842 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 17:25:57,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 17:25:57,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 17:25:57,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 17:25:57,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 17:25:57,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 17:25:57,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 17:25:57,843 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-08 17:25:57,844 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-08 17:25:57,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 17:25:57,844 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-08 17:25:57,844 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-08 17:25:58,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 17:25:58,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 17:25:58,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 17:25:58,275 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 17:25:58,276 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 17:25:58,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2021-10-08 17:25:58,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca48250b0/a64744a64f33476e9d78c049a225a7c6/FLAGdb82b60ec [2021-10-08 17:25:59,168 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 17:25:59,171 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2021-10-08 17:25:59,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca48250b0/a64744a64f33476e9d78c049a225a7c6/FLAGdb82b60ec [2021-10-08 17:25:59,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca48250b0/a64744a64f33476e9d78c049a225a7c6 [2021-10-08 17:25:59,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 17:25:59,509 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-08 17:25:59,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 17:25:59,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 17:25:59,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 17:25:59,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 05:25:59" (1/1) ... [2021-10-08 17:25:59,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4784518f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:25:59, skipping insertion in model container [2021-10-08 17:25:59,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 05:25:59" (1/1) ... [2021-10-08 17:25:59,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 17:25:59,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 17:25:59,750 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3936,3949] [2021-10-08 17:25:59,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:25:59,783 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-08 17:25:59,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 17:25:59,860 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3936,3949] [2021-10-08 17:25:59,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:25:59,878 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 17:25:59,919 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3936,3949] [2021-10-08 17:25:59,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:25:59,962 INFO L208 MainTranslator]: Completed translation [2021-10-08 17:25:59,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:25:59 WrapperNode [2021-10-08 17:25:59,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 17:25:59,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 17:25:59,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 17:25:59,966 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 17:25:59,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:25:59" (1/1) ... [2021-10-08 17:26:00,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:25:59" (1/1) ... [2021-10-08 17:26:00,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 17:26:00,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 17:26:00,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 17:26:00,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 17:26:00,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:25:59" (1/1) ... [2021-10-08 17:26:00,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:25:59" (1/1) ... [2021-10-08 17:26:00,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:25:59" (1/1) ... [2021-10-08 17:26:00,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:25:59" (1/1) ... [2021-10-08 17:26:00,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:25:59" (1/1) ... [2021-10-08 17:26:00,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:25:59" (1/1) ... [2021-10-08 17:26:00,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:25:59" (1/1) ... [2021-10-08 17:26:00,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 17:26:00,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 17:26:00,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 17:26:00,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 17:26:00,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:25:59" (1/1) ... [2021-10-08 17:26:00,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 17:26:00,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 17:26:00,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-08 17:26:00,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-08 17:26:00,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-08 17:26:00,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 17:26:00,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-08 17:26:00,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 17:26:00,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 17:26:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 17:26:00,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 17:26:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-08 17:26:00,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-08 17:26:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 17:26:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 17:26:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-08 17:26:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 17:26:00,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 17:26:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 17:26:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-08 17:26:00,290 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 17:26:02,477 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 17:26:02,477 INFO L299 CfgBuilder]: Removed 46 assume(true) statements. [2021-10-08 17:26:02,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 05:26:02 BoogieIcfgContainer [2021-10-08 17:26:02,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 17:26:02,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 17:26:02,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 17:26:02,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 17:26:02,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 05:25:59" (1/3) ... [2021-10-08 17:26:02,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7578fca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 05:26:02, skipping insertion in model container [2021-10-08 17:26:02,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:25:59" (2/3) ... [2021-10-08 17:26:02,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7578fca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 05:26:02, skipping insertion in model container [2021-10-08 17:26:02,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 05:26:02" (3/3) ... [2021-10-08 17:26:02,491 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2021-10-08 17:26:02,498 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 17:26:02,499 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2021-10-08 17:26:02,499 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 17:26:02,545 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,545 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,546 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,546 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,546 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,546 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,546 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,547 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,547 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,547 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,547 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,548 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,548 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,548 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,548 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,549 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,549 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,549 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,550 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,550 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,550 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,550 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,551 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,551 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,552 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,552 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,552 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,552 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,553 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,554 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,555 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,555 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,555 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,556 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,556 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,556 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,556 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,557 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,557 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,557 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,557 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,557 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,558 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,558 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,559 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,559 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,559 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,559 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,560 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,560 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,560 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,560 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,561 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,561 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,561 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,561 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,561 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,562 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,562 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,562 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,562 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,563 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~s~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,563 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~s~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,563 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,563 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,564 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,564 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,564 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,564 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,565 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,565 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,565 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,565 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,565 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,566 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,566 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,566 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,566 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,567 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,567 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,567 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,567 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,568 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,568 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,568 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,568 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,568 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,569 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~short15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,569 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~short15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,569 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~short15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~short15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,570 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,571 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,571 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,571 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~short15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,572 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,572 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,572 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,572 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,572 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,572 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~short15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,573 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,573 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~s~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,574 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~s~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,574 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,574 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~s~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,574 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~s~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,574 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,575 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,575 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,575 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,575 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,576 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,576 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,576 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,576 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,577 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,577 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,577 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,577 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,577 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,578 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,578 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,578 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,578 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,578 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,579 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,579 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,579 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,579 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,579 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,580 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,580 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,580 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,580 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,580 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,580 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,581 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,581 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,581 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,582 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,582 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,582 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,582 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,582 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,583 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,583 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,583 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,584 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,584 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,584 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,584 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,584 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,585 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,585 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,586 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,586 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,586 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,586 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,586 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,587 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,587 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,587 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,587 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,587 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,591 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,591 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,592 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,592 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,592 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,592 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,593 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,593 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,593 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,593 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,593 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,594 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,594 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,594 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,594 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,597 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,597 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,597 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,597 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,598 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,598 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,598 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,598 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,599 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,599 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,599 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,601 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,601 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,602 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~s~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,602 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,602 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,602 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,602 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,603 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,603 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,603 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~short15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,603 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:26:02,609 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-08 17:26:02,666 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 17:26:02,674 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, mConcurrency=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 [2021-10-08 17:26:02,674 INFO L340 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2021-10-08 17:26:02,698 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 17:26:02,712 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 255 places, 267 transitions, 558 flow [2021-10-08 17:26:02,715 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 255 places, 267 transitions, 558 flow [2021-10-08 17:26:02,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 255 places, 267 transitions, 558 flow [2021-10-08 17:26:02,925 INFO L129 PetriNetUnfolder]: 22/264 cut-off events. [2021-10-08 17:26:02,928 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-08 17:26:02,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 264 events. 22/264 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 304 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 214. Up to 3 conditions per place. [2021-10-08 17:26:02,946 INFO L116 LiptonReduction]: Number of co-enabled transitions 3794 [2021-10-08 17:27:01,450 INFO L131 LiptonReduction]: Checked pairs total: 6767 [2021-10-08 17:27:01,450 INFO L133 LiptonReduction]: Total number of compositions: 291 [2021-10-08 17:27:01,468 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 68 transitions, 160 flow [2021-10-08 17:27:01,633 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2868 states, 2190 states have (on average 4.810502283105023) internal successors, (10535), 2867 states have internal predecessors, (10535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:27:01,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 2868 states, 2190 states have (on average 4.810502283105023) internal successors, (10535), 2867 states have internal predecessors, (10535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:27:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 17:27:01,663 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:27:01,664 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 17:27:01,665 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:27:01,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:27:01,673 INFO L82 PathProgramCache]: Analyzing trace with hash 40129, now seen corresponding path program 1 times [2021-10-08 17:27:01,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:27:01,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134187606] [2021-10-08 17:27:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:27:01,689 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:27:01,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:27:01,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:27:01,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-08 17:27:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:27:01,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 17:27:01,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:27:01,975 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-08 17:27:01,976 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 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-08 17:27:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:27:02,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:27:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:27:02,034 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:27:02,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134187606] [2021-10-08 17:27:02,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134187606] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:27:02,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:27:02,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 17:27:02,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782618701] [2021-10-08 17:27:02,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 17:27:02,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:27:02,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 17:27:02,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:27:02,075 INFO L87 Difference]: Start difference. First operand has 2868 states, 2190 states have (on average 4.810502283105023) internal successors, (10535), 2867 states have internal predecessors, (10535), 0 states have call successors, (0), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:27:02,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:27:02,511 INFO L93 Difference]: Finished difference Result 2864 states and 10183 transitions. [2021-10-08 17:27:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:27:02,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2021-10-08 17:27:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:27:02,581 INFO L225 Difference]: With dead ends: 2864 [2021-10-08 17:27:02,581 INFO L226 Difference]: Without dead ends: 2864 [2021-10-08 17:27:02,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:27:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-10-08 17:27:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2864. [2021-10-08 17:27:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2190 states have (on average 4.649771689497717) internal successors, (10183), 2863 states have internal predecessors, (10183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:27:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 10183 transitions. [2021-10-08 17:27:02,860 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 10183 transitions. Word has length 2 [2021-10-08 17:27:02,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:27:02,861 INFO L470 AbstractCegarLoop]: Abstraction has 2864 states and 10183 transitions. [2021-10-08 17:27:02,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:27:02,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 10183 transitions. [2021-10-08 17:27:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 17:27:02,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:27:02,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 17:27:02,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-08 17:27:03,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:27:03,074 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:27:03,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:27:03,075 INFO L82 PathProgramCache]: Analyzing trace with hash 40130, now seen corresponding path program 1 times [2021-10-08 17:27:03,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:27:03,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170553327] [2021-10-08 17:27:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:27:03,080 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:27:03,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:27:03,081 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:27:03,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-08 17:27:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:27:03,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 17:27:03,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:27:03,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:27:03,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:27:03,592 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:27:03,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 17:27:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:27:03,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:27:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:27:03,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:27:03,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170553327] [2021-10-08 17:27:03,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170553327] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:27:03,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:27:03,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:27:03,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764769646] [2021-10-08 17:27:03,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:27:03,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:27:03,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:27:03,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:27:03,819 INFO L87 Difference]: Start difference. First operand 2864 states and 10183 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:27:05,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:27:05,106 INFO L93 Difference]: Finished difference Result 5727 states and 20370 transitions. [2021-10-08 17:27:05,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:27:05,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 2 [2021-10-08 17:27:05,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:27:05,173 INFO L225 Difference]: With dead ends: 5727 [2021-10-08 17:27:05,173 INFO L226 Difference]: Without dead ends: 5727 [2021-10-08 17:27:05,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:27:05,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5727 states. [2021-10-08 17:27:05,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5727 to 2870. [2021-10-08 17:27:05,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2196 states have (on average 4.644353369763206) internal successors, (10199), 2869 states have internal predecessors, (10199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:27:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 10199 transitions. [2021-10-08 17:27:05,436 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 10199 transitions. Word has length 2 [2021-10-08 17:27:05,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:27:05,438 INFO L470 AbstractCegarLoop]: Abstraction has 2870 states and 10199 transitions. [2021-10-08 17:27:05,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:27:05,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 10199 transitions. [2021-10-08 17:27:05,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 17:27:05,439 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:27:05,439 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 17:27:05,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-08 17:27:05,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:27:05,657 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:27:05,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:27:05,658 INFO L82 PathProgramCache]: Analyzing trace with hash 38786805, now seen corresponding path program 1 times [2021-10-08 17:27:05,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:27:05,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503409474] [2021-10-08 17:27:05,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:27:05,661 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:27:05,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:27:05,662 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:27:05,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-08 17:27:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:27:05,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:27:05,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:27:05,886 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-10-08 17:27:05,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 52 [2021-10-08 17:27:06,202 INFO L354 Elim1Store]: treesize reduction 92, result has 26.4 percent of original size [2021-10-08 17:27:06,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 88 [2021-10-08 17:27:06,680 INFO L354 Elim1Store]: treesize reduction 135, result has 23.3 percent of original size [2021-10-08 17:27:06,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 139 [2021-10-08 17:27:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:27:07,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:27:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:27:07,651 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:27:07,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503409474] [2021-10-08 17:27:07,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503409474] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:27:07,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:27:07,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-08 17:27:07,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927622964] [2021-10-08 17:27:07,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:27:07,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:27:07,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:27:07,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:27:07,654 INFO L87 Difference]: Start difference. First operand 2870 states and 10199 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-10-08 17:27:08,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:27:08,269 INFO L93 Difference]: Finished difference Result 2309 states and 7956 transitions. [2021-10-08 17:27:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:27:08,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 4 [2021-10-08 17:27:08,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:27:08,294 INFO L225 Difference]: With dead ends: 2309 [2021-10-08 17:27:08,294 INFO L226 Difference]: Without dead ends: 2309 [2021-10-08 17:27:08,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 871.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:27:08,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-10-08 17:27:08,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2309. [2021-10-08 17:27:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 1811 states have (on average 4.393152954168968) internal successors, (7956), 2308 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:27:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 7956 transitions. [2021-10-08 17:27:08,417 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 7956 transitions. Word has length 4 [2021-10-08 17:27:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:27:08,418 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 7956 transitions. [2021-10-08 17:27:08,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-10-08 17:27:08,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 7956 transitions. [2021-10-08 17:27:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 17:27:08,420 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:27:08,420 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 17:27:08,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-08 17:27:08,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:27:08,634 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:27:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:27:08,636 INFO L82 PathProgramCache]: Analyzing trace with hash 38786806, now seen corresponding path program 1 times [2021-10-08 17:27:08,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:27:08,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092212309] [2021-10-08 17:27:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:27:08,638 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:27:08,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:27:08,639 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:27:08,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-08 17:27:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:27:08,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 17:27:08,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:27:09,178 INFO L354 Elim1Store]: treesize reduction 233, result has 21.3 percent of original size [2021-10-08 17:27:09,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 93 [2021-10-08 17:27:09,190 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-08 17:27:09,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 92 [2021-10-08 17:27:11,034 INFO L354 Elim1Store]: treesize reduction 84, result has 36.8 percent of original size [2021-10-08 17:27:11,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 96 [2021-10-08 17:27:17,741 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:27:17,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092212309] [2021-10-08 17:27:17,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 17:27:17,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2059096676] [2021-10-08 17:27:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:27:17,743 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-08 17:27:17,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-08 17:27:17,747 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-08 17:27:17,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-08 17:27:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:27:18,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 17:27:18,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:27:18,351 INFO L354 Elim1Store]: treesize reduction 233, result has 21.3 percent of original size [2021-10-08 17:27:18,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 93 [2021-10-08 17:27:18,363 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-08 17:27:18,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 92 [2021-10-08 17:27:19,988 INFO L354 Elim1Store]: treesize reduction 84, result has 36.8 percent of original size [2021-10-08 17:27:19,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 96 [2021-10-08 17:27:32,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 17:27:32,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545999606] [2021-10-08 17:27:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:27:32,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 17:27:32,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 17:27:32,136 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 17:27:32,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-08 17:27:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:27:32,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-08 17:27:32,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:27:32,625 INFO L354 Elim1Store]: treesize reduction 241, result has 18.6 percent of original size [2021-10-08 17:27:32,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 111 [2021-10-08 17:27:32,714 INFO L354 Elim1Store]: treesize reduction 108, result has 18.8 percent of original size [2021-10-08 17:27:32,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 117 treesize of output 125 [2021-10-08 17:27:33,285 INFO L354 Elim1Store]: treesize reduction 112, result has 15.8 percent of original size [2021-10-08 17:27:33,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 115 [2021-10-08 17:27:33,387 INFO L354 Elim1Store]: treesize reduction 108, result has 31.2 percent of original size [2021-10-08 17:27:33,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 103 treesize of output 140 [2021-10-08 17:27:34,138 INFO L354 Elim1Store]: treesize reduction 160, result has 14.0 percent of original size [2021-10-08 17:27:34,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 151 treesize of output 165 [2021-10-08 17:27:34,237 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-10-08 17:27:34,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 150 treesize of output 158 [2021-10-08 17:27:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:27:38,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:27:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:27:41,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545999606] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:27:41,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:27:41,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-08 17:27:41,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049796665] [2021-10-08 17:27:41,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:27:41,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:27:41,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:27:41,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=72, Unknown=5, NotChecked=0, Total=110 [2021-10-08 17:27:41,373 INFO L87 Difference]: Start difference. First operand 2309 states and 7956 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-10-08 17:27:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:27:54,982 INFO L93 Difference]: Finished difference Result 3490 states and 11418 transitions. [2021-10-08 17:27:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 17:27:54,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 4 [2021-10-08 17:27:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:27:55,018 INFO L225 Difference]: With dead ends: 3490 [2021-10-08 17:27:55,018 INFO L226 Difference]: Without dead ends: 3490 [2021-10-08 17:27:55,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 12923.1ms TimeCoverageRelationStatistics Valid=49, Invalid=102, Unknown=5, NotChecked=0, Total=156 [2021-10-08 17:27:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-10-08 17:27:55,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 1748. [2021-10-08 17:27:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1426 states have (on average 4.006311360448808) internal successors, (5713), 1747 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:27:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 5713 transitions. [2021-10-08 17:27:55,128 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 5713 transitions. Word has length 4 [2021-10-08 17:27:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:27:55,129 INFO L470 AbstractCegarLoop]: Abstraction has 1748 states and 5713 transitions. [2021-10-08 17:27:55,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-10-08 17:27:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 5713 transitions. [2021-10-08 17:27:55,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 17:27:55,131 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:27:55,131 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-08 17:27:55,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-10-08 17:27:55,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-08 17:27:55,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-08 17:27:55,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 17:27:55,738 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:27:55,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:27:55,739 INFO L82 PathProgramCache]: Analyzing trace with hash 38708290, now seen corresponding path program 1 times [2021-10-08 17:27:55,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:27:55,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308332886] [2021-10-08 17:27:55,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:27:55,740 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:27:55,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:27:55,741 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:27:55,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-08 17:27:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:27:55,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 17:27:55,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:27:55,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:27:55,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:27:56,118 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:27:56,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 17:27:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:27:56,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:27:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:27:56,664 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:27:56,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308332886] [2021-10-08 17:27:56,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308332886] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:27:56,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:27:56,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 17:27:56,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575792662] [2021-10-08 17:27:56,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:27:56,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:27:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:27:56,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:27:56,666 INFO L87 Difference]: Start difference. First operand 1748 states and 5713 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-10-08 17:28:06,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:28:06,435 INFO L93 Difference]: Finished difference Result 10435 states and 34192 transitions. [2021-10-08 17:28:06,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 17:28:06,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 4 [2021-10-08 17:28:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:28:06,503 INFO L225 Difference]: With dead ends: 10435 [2021-10-08 17:28:06,503 INFO L226 Difference]: Without dead ends: 10435 [2021-10-08 17:28:06,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 832.7ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:28:06,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-10-08 17:28:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 1760. [2021-10-08 17:28:06,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1438 states have (on average 3.989568845618915) internal successors, (5737), 1759 states have internal predecessors, (5737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:28:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 5737 transitions. [2021-10-08 17:28:06,728 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 5737 transitions. Word has length 4 [2021-10-08 17:28:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:28:06,728 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 5737 transitions. [2021-10-08 17:28:06,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-10-08 17:28:06,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 5737 transitions. [2021-10-08 17:28:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 17:28:06,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:28:06,730 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-08 17:28:06,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-08 17:28:06,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:28:06,947 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:28:06,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:28:06,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1380554086, now seen corresponding path program 1 times [2021-10-08 17:28:06,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:28:06,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964648445] [2021-10-08 17:28:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:28:06,952 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:28:06,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:28:06,953 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:28:06,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-08 17:28:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:28:07,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 17:28:07,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:28:07,174 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-08 17:28:07,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 44 [2021-10-08 17:28:07,321 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-08 17:28:07,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 45 [2021-10-08 17:28:07,514 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-10-08 17:28:07,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 69 [2021-10-08 17:28:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:28:07,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:28:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:28:07,819 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:28:07,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964648445] [2021-10-08 17:28:07,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964648445] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:28:07,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:28:07,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-08 17:28:07,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450240741] [2021-10-08 17:28:07,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:28:07,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:28:07,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:28:07,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:28:07,822 INFO L87 Difference]: Start difference. First operand 1760 states and 5737 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:28:08,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:28:08,272 INFO L93 Difference]: Finished difference Result 1694 states and 5549 transitions. [2021-10-08 17:28:08,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:28:08,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2021-10-08 17:28:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:28:08,282 INFO L225 Difference]: With dead ends: 1694 [2021-10-08 17:28:08,282 INFO L226 Difference]: Without dead ends: 1694 [2021-10-08 17:28:08,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:28:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-10-08 17:28:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1694. [2021-10-08 17:28:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1404 states have (on average 3.952279202279202) internal successors, (5549), 1693 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:28:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 5549 transitions. [2021-10-08 17:28:08,409 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 5549 transitions. Word has length 6 [2021-10-08 17:28:08,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:28:08,410 INFO L470 AbstractCegarLoop]: Abstraction has 1694 states and 5549 transitions. [2021-10-08 17:28:08,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:28:08,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 5549 transitions. [2021-10-08 17:28:08,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 17:28:08,411 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:28:08,411 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-08 17:28:08,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-08 17:28:08,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:28:08,613 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:28:08,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:28:08,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1380554085, now seen corresponding path program 1 times [2021-10-08 17:28:08,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:28:08,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307676964] [2021-10-08 17:28:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:28:08,615 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:28:08,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:28:08,616 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:28:08,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-08 17:28:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:28:08,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 17:28:08,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:28:09,103 INFO L354 Elim1Store]: treesize reduction 233, result has 21.3 percent of original size [2021-10-08 17:28:09,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 84 [2021-10-08 17:28:09,110 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 86 treesize of output 84 [2021-10-08 17:28:10,342 INFO L354 Elim1Store]: treesize reduction 84, result has 36.8 percent of original size [2021-10-08 17:28:10,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 92 [2021-10-08 17:28:18,000 INFO L354 Elim1Store]: treesize reduction 84, result has 36.8 percent of original size [2021-10-08 17:28:18,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 95 [2021-10-08 17:28:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:28:37,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:28:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:28:37,979 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:28:37,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307676964] [2021-10-08 17:28:37,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307676964] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:28:37,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:28:37,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-08 17:28:37,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192952908] [2021-10-08 17:28:37,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:28:37,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:28:37,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:28:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=17, Unknown=1, NotChecked=0, Total=30 [2021-10-08 17:28:37,981 INFO L87 Difference]: Start difference. First operand 1694 states and 5549 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:28:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:28:53,477 INFO L93 Difference]: Finished difference Result 1628 states and 5361 transitions. [2021-10-08 17:28:53,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:28:53,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2021-10-08 17:28:53,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:28:53,487 INFO L225 Difference]: With dead ends: 1628 [2021-10-08 17:28:53,487 INFO L226 Difference]: Without dead ends: 1628 [2021-10-08 17:28:53,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 5003.2ms TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-10-08 17:28:53,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-10-08 17:28:53,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1628. [2021-10-08 17:28:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1370 states have (on average 3.913138686131387) internal successors, (5361), 1627 states have internal predecessors, (5361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:28:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 5361 transitions. [2021-10-08 17:28:53,544 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 5361 transitions. Word has length 6 [2021-10-08 17:28:53,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:28:53,544 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 5361 transitions. [2021-10-08 17:28:53,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:28:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 5361 transitions. [2021-10-08 17:28:53,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 17:28:53,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:28:53,545 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:28:53,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-08 17:28:53,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:28:53,746 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:28:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:28:53,746 INFO L82 PathProgramCache]: Analyzing trace with hash 152496279, now seen corresponding path program 1 times [2021-10-08 17:28:53,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:28:53,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882306741] [2021-10-08 17:28:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:28:53,747 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:28:53,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:28:53,749 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:28:53,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-08 17:28:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:28:53,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:28:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:28:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:28:53,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:28:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:28:54,005 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:28:54,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882306741] [2021-10-08 17:28:54,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882306741] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:28:54,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:28:54,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-08 17:28:54,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215316906] [2021-10-08 17:28:54,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:28:54,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:28:54,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:28:54,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:28:54,007 INFO L87 Difference]: Start difference. First operand 1628 states and 5361 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-10-08 17:28:54,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:28:54,401 INFO L93 Difference]: Finished difference Result 1721 states and 5570 transitions. [2021-10-08 17:28:54,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 17:28:54,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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 7 [2021-10-08 17:28:54,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:28:54,411 INFO L225 Difference]: With dead ends: 1721 [2021-10-08 17:28:54,411 INFO L226 Difference]: Without dead ends: 1713 [2021-10-08 17:28:54,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:28:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-10-08 17:28:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1711. [2021-10-08 17:28:54,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1447 states have (on average 3.8355217691776087) internal successors, (5550), 1710 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:28:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 5550 transitions. [2021-10-08 17:28:54,473 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 5550 transitions. Word has length 7 [2021-10-08 17:28:54,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:28:54,473 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 5550 transitions. [2021-10-08 17:28:54,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-10-08 17:28:54,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 5550 transitions. [2021-10-08 17:28:54,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 17:28:54,476 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:28:54,476 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:28:54,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-08 17:28:54,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:28:54,689 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:28:54,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:28:54,690 INFO L82 PathProgramCache]: Analyzing trace with hash 432447053, now seen corresponding path program 1 times [2021-10-08 17:28:54,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:28:54,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034201820] [2021-10-08 17:28:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:28:54,691 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:28:54,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:28:54,693 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:28:54,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-08 17:28:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:28:54,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:28:54,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:28:55,153 INFO L354 Elim1Store]: treesize reduction 241, result has 18.6 percent of original size [2021-10-08 17:28:55,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 76 [2021-10-08 17:28:55,158 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 79 treesize of output 77 [2021-10-08 17:28:55,635 INFO L354 Elim1Store]: treesize reduction 100, result has 24.8 percent of original size [2021-10-08 17:28:55,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 69 [2021-10-08 17:28:58,011 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:28:58,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034201820] [2021-10-08 17:28:58,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 17:28:58,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [867219991] [2021-10-08 17:28:58,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:28:58,012 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-08 17:28:58,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-08 17:28:58,015 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-08 17:28:58,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-08 17:28:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:28:58,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:28:58,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:28:58,680 INFO L354 Elim1Store]: treesize reduction 233, result has 21.3 percent of original size [2021-10-08 17:28:58,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 73 [2021-10-08 17:28:58,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 17:28:58,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534029629] [2021-10-08 17:28:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:28:58,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 17:28:58,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 17:28:58,803 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 17:28:58,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-08 17:28:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:28:59,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 17:28:59,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:28:59,273 INFO L354 Elim1Store]: treesize reduction 241, result has 18.6 percent of original size [2021-10-08 17:28:59,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 91 [2021-10-08 17:28:59,342 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-08 17:28:59,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 106 [2021-10-08 17:28:59,713 INFO L354 Elim1Store]: treesize reduction 112, result has 15.8 percent of original size [2021-10-08 17:28:59,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 102 [2021-10-08 17:28:59,819 INFO L354 Elim1Store]: treesize reduction 108, result has 31.2 percent of original size [2021-10-08 17:28:59,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 90 treesize of output 127 [2021-10-08 17:29:00,437 INFO L354 Elim1Store]: treesize reduction 160, result has 14.0 percent of original size [2021-10-08 17:29:00,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 143 treesize of output 157 [2021-10-08 17:29:00,524 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-10-08 17:29:00,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 142 treesize of output 150 [2021-10-08 17:29:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:29:13,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:29:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:29:17,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534029629] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:29:17,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:29:17,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-08 17:29:17,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608397168] [2021-10-08 17:29:17,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:29:17,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:29:17,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:29:17,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=55, Unknown=6, NotChecked=0, Total=90 [2021-10-08 17:29:17,822 INFO L87 Difference]: Start difference. First operand 1711 states and 5550 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:29:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:29:33,773 INFO L93 Difference]: Finished difference Result 1529 states and 5026 transitions. [2021-10-08 17:29:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:29:33,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-08 17:29:33,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:29:33,781 INFO L225 Difference]: With dead ends: 1529 [2021-10-08 17:29:33,781 INFO L226 Difference]: Without dead ends: 1529 [2021-10-08 17:29:33,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 16906.7ms TimeCoverageRelationStatistics Valid=37, Invalid=67, Unknown=6, NotChecked=0, Total=110 [2021-10-08 17:29:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-10-08 17:29:33,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1529. [2021-10-08 17:29:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1347 states have (on average 3.731254639940609) internal successors, (5026), 1528 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:29:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5026 transitions. [2021-10-08 17:29:33,845 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5026 transitions. Word has length 8 [2021-10-08 17:29:33,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:29:33,846 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 5026 transitions. [2021-10-08 17:29:33,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:29:33,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5026 transitions. [2021-10-08 17:29:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 17:29:33,847 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:29:33,847 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:29:33,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-08 17:29:34,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-08 17:29:34,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-08 17:29:34,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-10-08 17:29:34,449 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:29:34,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:29:34,450 INFO L82 PathProgramCache]: Analyzing trace with hash -915587621, now seen corresponding path program 1 times [2021-10-08 17:29:34,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:29:34,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683366360] [2021-10-08 17:29:34,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:29:34,452 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:29:34,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:29:34,455 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:29:34,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-08 17:29:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:29:34,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-08 17:29:34,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:29:34,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:29:34,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:29:34,969 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:29:34,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-08 17:29:35,067 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-08 17:29:35,068 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 3 case distinctions, treesize of input 89 treesize of output 103 [2021-10-08 17:29:35,257 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-08 17:29:35,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-10-08 17:29:35,286 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-08 17:29:35,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 42 [2021-10-08 17:29:35,423 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-10-08 17:29:35,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 58 [2021-10-08 17:29:35,451 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-08 17:29:35,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 54 [2021-10-08 17:29:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:29:39,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:29:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:29:45,333 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:29:45,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683366360] [2021-10-08 17:29:45,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683366360] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:29:45,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:29:45,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 17:29:45,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768350003] [2021-10-08 17:29:45,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:29:45,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:29:45,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:29:45,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2021-10-08 17:29:45,335 INFO L87 Difference]: Start difference. First operand 1529 states and 5026 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:30:47,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:30:47,828 INFO L93 Difference]: Finished difference Result 3377 states and 11168 transitions. [2021-10-08 17:30:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-08 17:30:47,830 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-08 17:30:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:30:47,842 INFO L225 Difference]: With dead ends: 3377 [2021-10-08 17:30:47,842 INFO L226 Difference]: Without dead ends: 3377 [2021-10-08 17:30:47,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 36058.7ms TimeCoverageRelationStatistics Valid=126, Invalid=374, Unknown=6, NotChecked=0, Total=506 [2021-10-08 17:30:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-10-08 17:30:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 2309. [2021-10-08 17:30:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2127 states have (on average 3.92054536906441) internal successors, (8339), 2308 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:30:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 8339 transitions. [2021-10-08 17:30:47,949 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 8339 transitions. Word has length 8 [2021-10-08 17:30:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:30:47,950 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 8339 transitions. [2021-10-08 17:30:47,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:30:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 8339 transitions. [2021-10-08 17:30:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 17:30:47,952 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:30:47,952 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:30:47,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-08 17:30:48,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:30:48,165 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:30:48,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:30:48,166 INFO L82 PathProgramCache]: Analyzing trace with hash -915587487, now seen corresponding path program 1 times [2021-10-08 17:30:48,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:30:48,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772640551] [2021-10-08 17:30:48,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:30:48,168 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:30:48,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:30:48,169 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:30:48,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-08 17:30:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:30:48,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:30:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:30:48,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 17:30:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:30:48,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:30:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:30:48,422 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:30:48,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772640551] [2021-10-08 17:30:48,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772640551] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:30:48,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:30:48,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-08 17:30:48,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911710235] [2021-10-08 17:30:48,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:30:48,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:30:48,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:30:48,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:30:48,424 INFO L87 Difference]: Start difference. First operand 2309 states and 8339 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2021-10-08 17:30:48,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:30:48,761 INFO L93 Difference]: Finished difference Result 1873 states and 6620 transitions. [2021-10-08 17:30:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:30:48,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 [2021-10-08 17:30:48,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:30:48,767 INFO L225 Difference]: With dead ends: 1873 [2021-10-08 17:30:48,767 INFO L226 Difference]: Without dead ends: 1873 [2021-10-08 17:30:48,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-08 17:30:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-10-08 17:30:48,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1873. [2021-10-08 17:30:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1747 states have (on average 3.7893531768746422) internal successors, (6620), 1872 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:30:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 6620 transitions. [2021-10-08 17:30:48,826 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 6620 transitions. Word has length 8 [2021-10-08 17:30:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:30:48,826 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 6620 transitions. [2021-10-08 17:30:48,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2021-10-08 17:30:48,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 6620 transitions. [2021-10-08 17:30:48,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 17:30:48,827 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:30:48,828 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:30:48,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-08 17:30:49,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:30:49,041 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:30:49,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:30:49,042 INFO L82 PathProgramCache]: Analyzing trace with hash -915587486, now seen corresponding path program 1 times [2021-10-08 17:30:49,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:30:49,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782781020] [2021-10-08 17:30:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:30:49,044 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:30:49,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:30:49,045 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:30:49,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-08 17:30:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:30:49,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:30:49,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:30:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:30:49,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:30:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:30:49,330 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:30:49,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782781020] [2021-10-08 17:30:49,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782781020] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:30:49,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:30:49,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-08 17:30:49,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649244769] [2021-10-08 17:30:49,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:30:49,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:30:49,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:30:49,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:30:49,332 INFO L87 Difference]: Start difference. First operand 1873 states and 6620 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:30:49,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:30:49,470 INFO L93 Difference]: Finished difference Result 2749 states and 9814 transitions. [2021-10-08 17:30:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:30:49,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2021-10-08 17:30:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:30:49,483 INFO L225 Difference]: With dead ends: 2749 [2021-10-08 17:30:49,484 INFO L226 Difference]: Without dead ends: 2749 [2021-10-08 17:30:49,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:30:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2021-10-08 17:30:49,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2189. [2021-10-08 17:30:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2048 states have (on average 3.98046875) internal successors, (8152), 2188 states have internal predecessors, (8152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:30:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 8152 transitions. [2021-10-08 17:30:49,558 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 8152 transitions. Word has length 8 [2021-10-08 17:30:49,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:30:49,558 INFO L470 AbstractCegarLoop]: Abstraction has 2189 states and 8152 transitions. [2021-10-08 17:30:49,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:30:49,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 8152 transitions. [2021-10-08 17:30:49,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 17:30:49,559 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:30:49,559 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-08 17:30:49,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-08 17:30:49,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:30:49,773 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:30:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:30:49,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1043796802, now seen corresponding path program 2 times [2021-10-08 17:30:49,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:30:49,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343250988] [2021-10-08 17:30:49,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:30:49,776 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:30:49,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:30:49,777 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:30:49,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-08 17:30:49,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:30:49,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:30:49,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 17:30:49,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:30:50,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:30:50,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:30:50,356 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:30:50,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 17:30:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:30:50,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:30:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:30:52,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:30:52,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343250988] [2021-10-08 17:30:52,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343250988] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:30:52,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:30:52,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 17:30:52,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022412652] [2021-10-08 17:30:52,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 17:30:52,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:30:52,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 17:30:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:30:52,910 INFO L87 Difference]: Start difference. First operand 2189 states and 8152 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:31:28,968 INFO L93 Difference]: Finished difference Result 19197 states and 72344 transitions. [2021-10-08 17:31:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-08 17:31:28,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-08 17:31:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:31:29,133 INFO L225 Difference]: With dead ends: 19197 [2021-10-08 17:31:29,134 INFO L226 Difference]: Without dead ends: 19197 [2021-10-08 17:31:29,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 7421.0ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-08 17:31:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19197 states. [2021-10-08 17:31:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19197 to 2221. [2021-10-08 17:31:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2221 states, 2080 states have (on average 3.95) internal successors, (8216), 2220 states have internal predecessors, (8216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 8216 transitions. [2021-10-08 17:31:29,624 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 8216 transitions. Word has length 8 [2021-10-08 17:31:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:31:29,624 INFO L470 AbstractCegarLoop]: Abstraction has 2221 states and 8216 transitions. [2021-10-08 17:31:29,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 8216 transitions. [2021-10-08 17:31:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 17:31:29,633 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:31:29,633 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:31:29,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-08 17:31:29,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:31:29,847 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err4REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:31:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:31:29,848 INFO L82 PathProgramCache]: Analyzing trace with hash 333549924, now seen corresponding path program 1 times [2021-10-08 17:31:29,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:31:29,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726829984] [2021-10-08 17:31:29,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:31:29,849 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:31:29,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:31:29,850 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:31:29,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-08 17:31:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:31:30,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-08 17:31:30,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:31:30,195 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-08 17:31:30,196 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 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-08 17:31:30,347 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-08 17:31:30,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-10-08 17:31:30,440 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-08 17:31:30,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 46 [2021-10-08 17:31:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 17:31:30,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:31:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 17:31:34,713 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:31:34,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726829984] [2021-10-08 17:31:34,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726829984] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:31:34,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:31:34,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-08 17:31:34,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095538114] [2021-10-08 17:31:34,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:31:34,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:31:34,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:31:34,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=17, Unknown=2, NotChecked=0, Total=30 [2021-10-08 17:31:34,714 INFO L87 Difference]: Start difference. First operand 2221 states and 8216 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:31:35,051 INFO L93 Difference]: Finished difference Result 1677 states and 5997 transitions. [2021-10-08 17:31:35,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:31:35,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-08 17:31:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:31:35,057 INFO L225 Difference]: With dead ends: 1677 [2021-10-08 17:31:35,058 INFO L226 Difference]: Without dead ends: 1677 [2021-10-08 17:31:35,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4200.8ms TimeCoverageRelationStatistics Valid=17, Invalid=23, Unknown=2, NotChecked=0, Total=42 [2021-10-08 17:31:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2021-10-08 17:31:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1564. [2021-10-08 17:31:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1482 states have (on average 3.6977058029689607) internal successors, (5480), 1563 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5480 transitions. [2021-10-08 17:31:35,148 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5480 transitions. Word has length 9 [2021-10-08 17:31:35,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:31:35,148 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 5480 transitions. [2021-10-08 17:31:35,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5480 transitions. [2021-10-08 17:31:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 17:31:35,150 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:31:35,150 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:31:35,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-08 17:31:35,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:31:35,352 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:31:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:31:35,353 INFO L82 PathProgramCache]: Analyzing trace with hash 589506834, now seen corresponding path program 1 times [2021-10-08 17:31:35,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:31:35,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258206903] [2021-10-08 17:31:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:31:35,354 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:31:35,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:31:35,357 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:31:35,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-08 17:31:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:31:35,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:31:35,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:31:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:31:35,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:31:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:31:35,696 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:31:35,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258206903] [2021-10-08 17:31:35,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258206903] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:31:35,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:31:35,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-08 17:31:35,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923095625] [2021-10-08 17:31:35,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:31:35,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:31:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:31:35,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:31:35,698 INFO L87 Difference]: Start difference. First operand 1564 states and 5480 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:31:35,923 INFO L93 Difference]: Finished difference Result 1298 states and 4317 transitions. [2021-10-08 17:31:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:31:35,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-08 17:31:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:31:35,929 INFO L225 Difference]: With dead ends: 1298 [2021-10-08 17:31:35,930 INFO L226 Difference]: Without dead ends: 1298 [2021-10-08 17:31:35,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:31:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-10-08 17:31:35,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1298. [2021-10-08 17:31:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1208 states have (on average 3.573675496688742) internal successors, (4317), 1297 states have internal predecessors, (4317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 4317 transitions. [2021-10-08 17:31:35,962 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 4317 transitions. Word has length 10 [2021-10-08 17:31:35,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:31:35,962 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 4317 transitions. [2021-10-08 17:31:35,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:35,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 4317 transitions. [2021-10-08 17:31:35,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 17:31:35,963 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:31:35,964 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:31:35,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-08 17:31:36,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:31:36,178 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err0REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:31:36,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:31:36,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1870744063, now seen corresponding path program 1 times [2021-10-08 17:31:36,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:31:36,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064856712] [2021-10-08 17:31:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:31:36,180 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:31:36,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:31:36,180 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:31:36,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-08 17:31:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:31:36,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:31:36,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:31:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:31:36,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:31:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:31:36,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:31:36,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064856712] [2021-10-08 17:31:36,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064856712] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:31:36,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:31:36,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-08 17:31:36,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817736452] [2021-10-08 17:31:36,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:31:36,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:31:36,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:31:36,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:31:36,526 INFO L87 Difference]: Start difference. First operand 1298 states and 4317 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:31:36,751 INFO L93 Difference]: Finished difference Result 1114 states and 3473 transitions. [2021-10-08 17:31:36,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:31:36,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 17:31:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:31:36,757 INFO L225 Difference]: With dead ends: 1114 [2021-10-08 17:31:36,757 INFO L226 Difference]: Without dead ends: 1085 [2021-10-08 17:31:36,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:31:36,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-10-08 17:31:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1073. [2021-10-08 17:31:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 986 states have (on average 3.4442190669371198) internal successors, (3396), 1072 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3396 transitions. [2021-10-08 17:31:36,783 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3396 transitions. Word has length 11 [2021-10-08 17:31:36,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:31:36,783 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3396 transitions. [2021-10-08 17:31:36,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:36,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3396 transitions. [2021-10-08 17:31:36,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 17:31:36,784 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:31:36,784 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:31:36,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-08 17:31:36,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:31:36,999 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:31:36,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:31:36,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1767630441, now seen corresponding path program 2 times [2021-10-08 17:31:37,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:31:37,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85142158] [2021-10-08 17:31:37,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:31:37,001 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:31:37,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:31:37,003 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:31:37,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-08 17:31:37,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 17:31:37,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:31:37,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 17:31:37,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:31:37,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:31:37,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:31:37,736 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:31:37,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-08 17:31:37,859 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-08 17:31:37,859 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 3 case distinctions, treesize of input 89 treesize of output 103 [2021-10-08 17:31:38,057 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-08 17:31:38,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-10-08 17:31:38,093 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-08 17:31:38,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 43 [2021-10-08 17:31:38,223 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-10-08 17:31:38,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 57 [2021-10-08 17:31:38,262 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-08 17:31:38,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2021-10-08 17:31:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 17:31:42,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:31:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 17:31:49,523 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:31:49,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85142158] [2021-10-08 17:31:49,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85142158] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:31:49,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:31:49,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-08 17:31:49,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122046866] [2021-10-08 17:31:49,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:31:49,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:31:49,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:31:49,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2021-10-08 17:31:49,525 INFO L87 Difference]: Start difference. First operand 1073 states and 3396 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:56,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:31:56,660 INFO L93 Difference]: Finished difference Result 841 states and 2658 transitions. [2021-10-08 17:31:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 17:31:56,664 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 17:31:56,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:31:56,666 INFO L225 Difference]: With dead ends: 841 [2021-10-08 17:31:56,667 INFO L226 Difference]: Without dead ends: 841 [2021-10-08 17:31:56,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 7568.0ms TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2021-10-08 17:31:56,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-10-08 17:31:56,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 526. [2021-10-08 17:31:56,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 486 states have (on average 3.0555555555555554) internal successors, (1485), 525 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1485 transitions. [2021-10-08 17:31:56,678 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1485 transitions. Word has length 11 [2021-10-08 17:31:56,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:31:56,679 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1485 transitions. [2021-10-08 17:31:56,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:31:56,679 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1485 transitions. [2021-10-08 17:31:56,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 17:31:56,679 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:31:56,680 INFO L512 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2021-10-08 17:31:56,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-08 17:31:56,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:31:56,897 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:31:56,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:31:56,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1298471920, now seen corresponding path program 1 times [2021-10-08 17:31:56,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:31:56,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12976571] [2021-10-08 17:31:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:31:56,899 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:31:56,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:31:56,900 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:31:56,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-08 17:31:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:31:57,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-08 17:31:57,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:31:57,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 17:31:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:31:57,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:32:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:32:01,691 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:32:01,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12976571] [2021-10-08 17:32:01,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12976571] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:32:01,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:32:01,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-08 17:32:01,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166249096] [2021-10-08 17:32:01,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-08 17:32:01,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:32:01,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-08 17:32:01,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-10-08 17:32:01,696 INFO L87 Difference]: Start difference. First operand 526 states and 1485 transitions. Second operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:32:11,362 WARN L207 SmtUtils]: Spent 7.11 s on a formula simplification that was a NOOP. DAG size: 113 [2021-10-08 17:33:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:33:12,000 INFO L93 Difference]: Finished difference Result 5691 states and 16707 transitions. [2021-10-08 17:33:12,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-08 17:33:12,003 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 17:33:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:33:12,018 INFO L225 Difference]: With dead ends: 5691 [2021-10-08 17:33:12,018 INFO L226 Difference]: Without dead ends: 5691 [2021-10-08 17:33:12,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 26671.8ms TimeCoverageRelationStatistics Valid=339, Invalid=591, Unknown=0, NotChecked=0, Total=930 [2021-10-08 17:33:12,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5691 states. [2021-10-08 17:33:12,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5691 to 554. [2021-10-08 17:33:12,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 514 states have (on average 2.992217898832685) internal successors, (1538), 553 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:33:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1538 transitions. [2021-10-08 17:33:12,060 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1538 transitions. Word has length 12 [2021-10-08 17:33:12,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:33:12,062 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1538 transitions. [2021-10-08 17:33:12,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:33:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1538 transitions. [2021-10-08 17:33:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 17:33:12,063 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:33:12,063 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:33:12,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-08 17:33:12,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:33:12,277 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:33:12,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:33:12,278 INFO L82 PathProgramCache]: Analyzing trace with hash -238837981, now seen corresponding path program 1 times [2021-10-08 17:33:12,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:33:12,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221939907] [2021-10-08 17:33:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:33:12,279 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:33:12,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:33:12,280 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:33:12,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-08 17:33:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:33:12,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:33:12,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:33:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:33:12,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:33:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:33:12,757 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:33:12,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221939907] [2021-10-08 17:33:12,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221939907] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:33:12,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:33:12,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-08 17:33:12,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770443847] [2021-10-08 17:33:12,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:33:12,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:33:12,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:33:12,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:33:12,760 INFO L87 Difference]: Start difference. First operand 554 states and 1538 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:33:13,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:33:13,074 INFO L93 Difference]: Finished difference Result 662 states and 1752 transitions. [2021-10-08 17:33:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 17:33:13,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 17:33:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:33:13,077 INFO L225 Difference]: With dead ends: 662 [2021-10-08 17:33:13,077 INFO L226 Difference]: Without dead ends: 581 [2021-10-08 17:33:13,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:33:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-10-08 17:33:13,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 554. [2021-10-08 17:33:13,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 514 states have (on average 2.992217898832685) internal successors, (1538), 553 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:33:13,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1538 transitions. [2021-10-08 17:33:13,089 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1538 transitions. Word has length 12 [2021-10-08 17:33:13,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:33:13,090 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1538 transitions. [2021-10-08 17:33:13,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:33:13,090 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1538 transitions. [2021-10-08 17:33:13,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 17:33:13,091 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:33:13,091 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:33:13,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-08 17:33:13,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:33:13,305 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:33:13,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:33:13,306 INFO L82 PathProgramCache]: Analyzing trace with hash -696077693, now seen corresponding path program 1 times [2021-10-08 17:33:13,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:33:13,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871420476] [2021-10-08 17:33:13,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:33:13,307 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:33:13,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:33:13,308 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:33:13,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-08 17:33:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:33:13,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-08 17:33:13,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:33:13,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 17:33:13,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 17:33:13,861 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-08 17:33:13,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-10-08 17:33:13,879 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 17:33:13,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-10-08 17:33:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:33:14,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:33:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:33:16,694 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:33:16,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871420476] [2021-10-08 17:33:16,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871420476] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:33:16,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:33:16,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-08 17:33:16,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226689841] [2021-10-08 17:33:16,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:33:16,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:33:16,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:33:16,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:33:16,696 INFO L87 Difference]: Start difference. First operand 554 states and 1538 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:33:31,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:33:31,065 INFO L93 Difference]: Finished difference Result 1275 states and 3559 transitions. [2021-10-08 17:33:31,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-08 17:33:31,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 13 [2021-10-08 17:33:31,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:33:31,072 INFO L225 Difference]: With dead ends: 1275 [2021-10-08 17:33:31,072 INFO L226 Difference]: Without dead ends: 1275 [2021-10-08 17:33:31,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 8266.5ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-08 17:33:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-10-08 17:33:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 808. [2021-10-08 17:33:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 768 states have (on average 3.1510416666666665) internal successors, (2420), 807 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:33:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2420 transitions. [2021-10-08 17:33:31,088 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2420 transitions. Word has length 13 [2021-10-08 17:33:31,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:33:31,088 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 2420 transitions. [2021-10-08 17:33:31,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:33:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2420 transitions. [2021-10-08 17:33:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 17:33:31,089 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:33:31,089 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:33:31,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-08 17:33:31,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:33:31,303 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:33:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:33:31,303 INFO L82 PathProgramCache]: Analyzing trace with hash -696077692, now seen corresponding path program 1 times [2021-10-08 17:33:31,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:33:31,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879638758] [2021-10-08 17:33:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:33:31,305 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:33:31,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:33:31,306 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:33:31,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-08 17:33:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:33:31,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:33:31,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:33:31,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 17:33:31,758 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-08 17:33:31,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-10-08 17:33:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 17:33:31,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:33:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 17:33:31,944 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:33:31,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879638758] [2021-10-08 17:33:31,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879638758] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:33:31,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:33:31,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-08 17:33:31,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873889156] [2021-10-08 17:33:31,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-08 17:33:31,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:33:31,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-08 17:33:31,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-08 17:33:31,947 INFO L87 Difference]: Start difference. First operand 808 states and 2420 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:33:32,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:33:32,241 INFO L93 Difference]: Finished difference Result 628 states and 1757 transitions. [2021-10-08 17:33:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:33:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-08 17:33:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:33:32,244 INFO L225 Difference]: With dead ends: 628 [2021-10-08 17:33:32,244 INFO L226 Difference]: Without dead ends: 628 [2021-10-08 17:33:32,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:33:32,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-10-08 17:33:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2021-10-08 17:33:32,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 607 states have (on average 2.8945634266886326) internal successors, (1757), 627 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:33:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1757 transitions. [2021-10-08 17:33:32,253 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1757 transitions. Word has length 13 [2021-10-08 17:33:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:33:32,255 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1757 transitions. [2021-10-08 17:33:32,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:33:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1757 transitions. [2021-10-08 17:33:32,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:33:32,256 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:33:32,256 INFO L512 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1] [2021-10-08 17:33:32,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-08 17:33:32,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:33:32,460 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:33:32,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:33:32,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1133471096, now seen corresponding path program 1 times [2021-10-08 17:33:32,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:33:32,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519418607] [2021-10-08 17:33:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:33:32,462 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:33:32,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:33:32,464 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:33:32,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-08 17:33:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:33:32,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-08 17:33:32,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:33:32,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 17:33:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:33:33,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:33:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:33:39,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:33:39,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519418607] [2021-10-08 17:33:39,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519418607] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:33:39,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:33:39,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-08 17:33:39,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442798536] [2021-10-08 17:33:39,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-08 17:33:39,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:33:39,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-08 17:33:39,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2021-10-08 17:33:39,442 INFO L87 Difference]: Start difference. First operand 628 states and 1757 transitions. Second operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:33:53,472 WARN L207 SmtUtils]: Spent 9.60 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-08 17:34:50,955 WARN L207 SmtUtils]: Spent 7.22 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-08 17:35:33,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:35:33,800 INFO L93 Difference]: Finished difference Result 13870 states and 41102 transitions. [2021-10-08 17:35:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-08 17:35:33,802 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-08 17:35:33,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:35:33,843 INFO L225 Difference]: With dead ends: 13870 [2021-10-08 17:35:33,843 INFO L226 Difference]: Without dead ends: 13870 [2021-10-08 17:35:33,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 46027.9ms TimeCoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2021-10-08 17:35:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13870 states. [2021-10-08 17:35:34,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13870 to 670. [2021-10-08 17:35:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 649 states have (on average 2.815100154083205) internal successors, (1827), 669 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:35:34,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1827 transitions. [2021-10-08 17:35:34,018 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1827 transitions. Word has length 16 [2021-10-08 17:35:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:35:34,019 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 1827 transitions. [2021-10-08 17:35:34,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:35:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1827 transitions. [2021-10-08 17:35:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:35:34,020 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:35:34,020 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:35:34,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-08 17:35:34,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:35:34,235 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:35:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:35:34,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1298303197, now seen corresponding path program 2 times [2021-10-08 17:35:34,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:35:34,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037224213] [2021-10-08 17:35:34,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:35:34,237 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:35:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:35:34,239 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:35:34,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-08 17:35:34,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 17:35:34,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:35:34,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 17:35:34,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:35:34,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 17:35:34,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 17:35:34,761 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-08 17:35:34,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-10-08 17:35:34,778 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 17:35:34,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-10-08 17:35:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-08 17:35:37,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:35:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-08 17:35:40,282 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:35:40,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037224213] [2021-10-08 17:35:40,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037224213] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:35:40,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:35:40,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-08 17:35:40,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506598981] [2021-10-08 17:35:40,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:35:40,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:35:40,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:35:40,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:35:40,284 INFO L87 Difference]: Start difference. First operand 670 states and 1827 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:35:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:35:41,087 INFO L93 Difference]: Finished difference Result 560 states and 1495 transitions. [2021-10-08 17:35:41,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:35:41,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-08 17:35:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:35:41,090 INFO L225 Difference]: With dead ends: 560 [2021-10-08 17:35:41,090 INFO L226 Difference]: Without dead ends: 560 [2021-10-08 17:35:41,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2238.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:35:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-10-08 17:35:41,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 338. [2021-10-08 17:35:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 330 states have (on average 2.5393939393939395) internal successors, (838), 337 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:35:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 838 transitions. [2021-10-08 17:35:41,097 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 838 transitions. Word has length 16 [2021-10-08 17:35:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:35:41,097 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 838 transitions. [2021-10-08 17:35:41,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:35:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 838 transitions. [2021-10-08 17:35:41,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:35:41,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:35:41,098 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-08 17:35:41,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-08 17:35:41,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:35:41,311 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:35:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:35:41,312 INFO L82 PathProgramCache]: Analyzing trace with hash -497454782, now seen corresponding path program 3 times [2021-10-08 17:35:41,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:35:41,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202969738] [2021-10-08 17:35:41,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:35:41,313 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:35:41,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:35:41,314 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:35:41,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-08 17:35:41,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-08 17:35:41,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:35:41,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-08 17:35:41,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:35:41,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:35:41,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:35:42,182 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:35:42,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 17:35:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:35:43,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:35:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:35:50,797 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:35:50,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202969738] [2021-10-08 17:35:50,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202969738] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:35:50,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:35:50,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-08 17:35:50,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144687495] [2021-10-08 17:35:50,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-08 17:35:50,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:35:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-08 17:35:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-08 17:35:50,799 INFO L87 Difference]: Start difference. First operand 338 states and 838 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:36:07,963 WARN L207 SmtUtils]: Spent 10.89 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-08 17:36:18,435 WARN L207 SmtUtils]: Spent 9.07 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-08 17:36:55,730 WARN L207 SmtUtils]: Spent 7.69 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-08 17:37:31,564 WARN L207 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-08 17:38:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:38:07,336 INFO L93 Difference]: Finished difference Result 3922 states and 11062 transitions. [2021-10-08 17:38:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-08 17:38:07,338 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-08 17:38:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:38:07,348 INFO L225 Difference]: With dead ends: 3922 [2021-10-08 17:38:07,349 INFO L226 Difference]: Without dead ends: 3922 [2021-10-08 17:38:07,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 68500.1ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-08 17:38:07,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3922 states. [2021-10-08 17:38:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3922 to 354. [2021-10-08 17:38:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 346 states have (on average 2.514450867052023) internal successors, (870), 353 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:38:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 870 transitions. [2021-10-08 17:38:07,384 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 870 transitions. Word has length 16 [2021-10-08 17:38:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:38:07,385 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 870 transitions. [2021-10-08 17:38:07,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:38:07,385 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 870 transitions. [2021-10-08 17:38:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-08 17:38:07,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:38:07,386 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:38:07,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-08 17:38:07,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:38:07,587 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err3REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:38:07,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:38:07,588 INFO L82 PathProgramCache]: Analyzing trace with hash -791859280, now seen corresponding path program 1 times [2021-10-08 17:38:07,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:38:07,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321909804] [2021-10-08 17:38:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:38:07,590 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:38:07,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:38:07,591 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:38:07,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-08 17:38:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:38:08,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:38:08,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:38:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 17:38:08,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:38:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 17:38:08,281 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:38:08,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321909804] [2021-10-08 17:38:08,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321909804] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:38:08,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:38:08,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-08 17:38:08,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712548146] [2021-10-08 17:38:08,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:38:08,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:38:08,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:38:08,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:38:08,283 INFO L87 Difference]: Start difference. First operand 354 states and 870 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:38:08,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:38:08,557 INFO L93 Difference]: Finished difference Result 487 states and 1183 transitions. [2021-10-08 17:38:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 17:38:08,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2021-10-08 17:38:08,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:38:08,560 INFO L225 Difference]: With dead ends: 487 [2021-10-08 17:38:08,560 INFO L226 Difference]: Without dead ends: 354 [2021-10-08 17:38:08,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-08 17:38:08,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-10-08 17:38:08,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2021-10-08 17:38:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 346 states have (on average 2.5115606936416186) internal successors, (869), 353 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:38:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 869 transitions. [2021-10-08 17:38:08,566 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 869 transitions. Word has length 18 [2021-10-08 17:38:08,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:38:08,566 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 869 transitions. [2021-10-08 17:38:08,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:38:08,566 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 869 transitions. [2021-10-08 17:38:08,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:38:08,567 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:38:08,567 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:38:08,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-08 17:38:08,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:38:08,769 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err3REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:38:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:38:08,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1680382003, now seen corresponding path program 1 times [2021-10-08 17:38:08,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:38:08,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234037225] [2021-10-08 17:38:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:38:08,771 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:38:08,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:38:08,773 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:38:08,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-08 17:38:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:38:09,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 17:38:09,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:38:09,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 17:38:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 17:38:09,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:38:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 17:38:11,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:38:11,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234037225] [2021-10-08 17:38:11,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234037225] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:38:11,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:38:11,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-08 17:38:11,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815472703] [2021-10-08 17:38:11,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:38:11,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:38:11,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:38:11,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:38:11,651 INFO L87 Difference]: Start difference. First operand 354 states and 869 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:38:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:38:14,945 INFO L93 Difference]: Finished difference Result 700 states and 1817 transitions. [2021-10-08 17:38:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 17:38:14,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-08 17:38:14,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:38:14,947 INFO L225 Difference]: With dead ends: 700 [2021-10-08 17:38:14,947 INFO L226 Difference]: Without dead ends: 700 [2021-10-08 17:38:14,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1917.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-08 17:38:14,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-10-08 17:38:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 511. [2021-10-08 17:38:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 503 states have (on average 2.6202783300198806) internal successors, (1318), 510 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:38:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1318 transitions. [2021-10-08 17:38:14,960 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1318 transitions. Word has length 19 [2021-10-08 17:38:14,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:38:14,960 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1318 transitions. [2021-10-08 17:38:14,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:38:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1318 transitions. [2021-10-08 17:38:14,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-08 17:38:14,962 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:38:14,962 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:38:14,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-10-08 17:38:15,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:38:15,176 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err3REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:38:15,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:38:15,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2136688528, now seen corresponding path program 2 times [2021-10-08 17:38:15,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:38:15,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681035575] [2021-10-08 17:38:15,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:38:15,178 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:38:15,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:38:15,179 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:38:15,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-08 17:38:15,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 17:38:15,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:38:15,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 17:38:15,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:38:15,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 17:38:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-08 17:38:15,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:38:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-08 17:38:18,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:38:18,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681035575] [2021-10-08 17:38:18,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681035575] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:38:18,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:38:18,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-08 17:38:18,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056017461] [2021-10-08 17:38:18,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:38:18,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:38:18,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:38:18,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:38:18,106 INFO L87 Difference]: Start difference. First operand 511 states and 1318 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:38:18,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:38:18,524 INFO L93 Difference]: Finished difference Result 461 states and 1155 transitions. [2021-10-08 17:38:18,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:38:18,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-08 17:38:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:38:18,527 INFO L225 Difference]: With dead ends: 461 [2021-10-08 17:38:18,527 INFO L226 Difference]: Without dead ends: 461 [2021-10-08 17:38:18,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-08 17:38:18,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-10-08 17:38:18,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 304. [2021-10-08 17:38:18,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 300 states have (on average 2.3533333333333335) internal successors, (706), 303 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:38:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 706 transitions. [2021-10-08 17:38:18,532 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 706 transitions. Word has length 22 [2021-10-08 17:38:18,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:38:18,532 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 706 transitions. [2021-10-08 17:38:18,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:38:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 706 transitions. [2021-10-08 17:38:18,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-08 17:38:18,533 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:38:18,533 INFO L512 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2021-10-08 17:38:18,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-08 17:38:18,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:38:18,737 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err4REQUIRES_VIOLATION, thread1Err5REQUIRES_VIOLATION, thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION (and 47 more)] === [2021-10-08 17:38:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:38:18,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1402693496, now seen corresponding path program 2 times [2021-10-08 17:38:18,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:38:18,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515576857] [2021-10-08 17:38:18,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:38:18,739 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:38:18,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:38:18,741 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:38:18,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-08 17:38:19,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:38:19,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:38:19,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-08 17:38:19,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:38:19,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-08 17:38:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:38:20,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:38:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:38:33,519 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:38:33,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515576857] [2021-10-08 17:38:33,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515576857] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:38:33,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:38:33,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2021-10-08 17:38:33,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968580320] [2021-10-08 17:38:33,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-08 17:38:33,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:38:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-08 17:38:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1366, Unknown=0, NotChecked=0, Total=1892 [2021-10-08 17:38:33,522 INFO L87 Difference]: Start difference. First operand 304 states and 706 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:39:06,905 WARN L207 SmtUtils]: Spent 18.44 s on a formula simplification that was a NOOP. DAG size: 228 Received shutdown request... [2021-10-08 17:40:02,918 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-08 17:40:02,933 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-08 17:40:03,017 WARN L223 SmtUtils]: Removed 8 from assertion stack [2021-10-08 17:40:03,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-08 17:40:03,019 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-08 17:40:03,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-08 17:40:03,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:40:03,220 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. [2021-10-08 17:40:03,222 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4REQUIRES_VIOLATION [2021-10-08 17:40:03,222 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5REQUIRES_VIOLATION [2021-10-08 17:40:03,222 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-08 17:40:03,222 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-08 17:40:03,222 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-08 17:40:03,223 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-08 17:40:03,223 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-08 17:40:03,223 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-08 17:40:03,223 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-08 17:40:03,223 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-08 17:40:03,223 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-08 17:40:03,223 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-08 17:40:03,223 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-08 17:40:03,224 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-08 17:40:03,224 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-08 17:40:03,224 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-08 17:40:03,224 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-08 17:40:03,224 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-08 17:40:03,224 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-08 17:40:03,224 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-08 17:40:03,224 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-08 17:40:03,224 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-08 17:40:03,224 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-08 17:40:03,225 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-08 17:40:03,225 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-08 17:40:03,225 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-08 17:40:03,225 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-08 17:40:03,225 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-08 17:40:03,225 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-08 17:40:03,225 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-08 17:40:03,225 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-08 17:40:03,226 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 17:40:03,231 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 17:40:03,231 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 17:40:03,232 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 17:40:03,232 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-08 17:40:03,232 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4REQUIRES_VIOLATION [2021-10-08 17:40:03,232 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5REQUIRES_VIOLATION [2021-10-08 17:40:03,232 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-08 17:40:03,232 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-08 17:40:03,232 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-08 17:40:03,232 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-08 17:40:03,232 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-08 17:40:03,232 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-08 17:40:03,232 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-08 17:40:03,233 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-08 17:40:03,233 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-08 17:40:03,233 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-08 17:40:03,233 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-08 17:40:03,233 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-08 17:40:03,241 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 17:40:03,241 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 17:40:03,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.10 05:40:03 BasicIcfg [2021-10-08 17:40:03,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-08 17:40:03,244 INFO L168 Benchmark]: Toolchain (without parser) took 843756.43 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 126.3 MB in the beginning and 134.8 MB in the end (delta: -8.5 MB). Peak memory consumption was 133.2 MB. Max. memory is 8.0 GB. [2021-10-08 17:40:03,244 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-08 17:40:03,245 INFO L168 Benchmark]: CACSL2BoogieTranslator took 453.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 110.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-10-08 17:40:03,245 INFO L168 Benchmark]: Boogie Procedure Inliner took 125.56 ms. Allocated memory is still 151.0 MB. Free memory was 110.7 MB in the beginning and 108.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 17:40:03,245 INFO L168 Benchmark]: Boogie Preprocessor took 88.55 ms. Allocated memory is still 151.0 MB. Free memory was 108.1 MB in the beginning and 106.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 17:40:03,246 INFO L168 Benchmark]: RCFGBuilder took 2299.33 ms. Allocated memory is still 151.0 MB. Free memory was 105.9 MB in the beginning and 79.8 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. [2021-10-08 17:40:03,246 INFO L168 Benchmark]: TraceAbstraction took 840760.20 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 79.2 MB in the beginning and 134.8 MB in the end (delta: -55.5 MB). Peak memory consumption was 85.0 MB. Max. memory is 8.0 GB. [2021-10-08 17:40:03,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 453.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 110.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 125.56 ms. Allocated memory is still 151.0 MB. Free memory was 110.7 MB in the beginning and 108.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 88.55 ms. Allocated memory is still 151.0 MB. Free memory was 108.1 MB in the beginning and 106.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 2299.33 ms. Allocated memory is still 151.0 MB. Free memory was 105.9 MB in the beginning and 79.8 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 840760.20 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 79.2 MB in the beginning and 134.8 MB in the end (delta: -55.5 MB). Peak memory consumption was 85.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 58737.3ms, 255 PlacesBefore, 71 PlacesAfterwards, 267 TransitionsBefore, 68 TransitionsAfterwards, 3794 CoEnabledTransitionPairs, 7 FixpointIterations, 167 TrivialSequentialCompositions, 70 ConcurrentSequentialCompositions, 31 TrivialYvCompositions, 8 ConcurrentYvCompositions, 15 ChoiceCompositions, 291 TotalNumberOfCompositions, 6767 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4945, positive: 4854, positive conditional: 0, positive unconditional: 4854, negative: 91, negative conditional: 0, negative unconditional: 91, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2361, positive: 2332, positive conditional: 0, positive unconditional: 2332, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2361, positive: 2318, positive conditional: 0, positive unconditional: 2318, negative: 43, negative conditional: 0, negative unconditional: 43, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 43, positive: 14, positive conditional: 0, positive unconditional: 14, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 5785, positive: 3284, positive conditional: 0, positive unconditional: 3284, negative: 2501, negative conditional: 0, negative unconditional: 2501, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4945, positive: 2522, positive conditional: 0, positive unconditional: 2522, negative: 62, negative conditional: 0, negative unconditional: 62, unknown: 2361, unknown conditional: 0, unknown unconditional: 2361] , Statistics on independence cache: Total cache size (in pairs): 243, Positive cache size: 235, Positive conditional cache size: 0, Positive unconditional cache size: 235, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 161]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 161]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 161]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 161]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 161]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 161]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 142]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 142]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 144]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 144]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 145]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 145]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 146]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 146]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 147]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 147]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 150]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 117]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 142]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 144]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (304states) and FLOYD_HOARE automaton (currently 24 states, 44 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 218 for 13068ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 297 locations, 51 error locations. Started 1 CEGAR loops. OverallTime: 840573.5ms, OverallIterations: 28, TraceHistogramMax: 20, EmptinessCheckTime: 60.0ms, AutomataDifference: 596110.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 58958.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1146 SDtfs, 16363 SDslu, 8213 SDs, 0 SdLazy, 20343 SolverSat, 2693 SolverUnsat, 128 SolverUnknown, 0 SolverNotchecked, 368224.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 620 GetRequests, 301 SyntacticMatches, 11 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 279076.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2870occurred in iteration=2, InterpolantAutomatonStates: 228, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2487.1ms AutomataMinimizationTime, 27 MinimizatonAttempts, 55287 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 363.6ms SsaConstructionTime, 2738.3ms SatisfiabilityAnalysisTime, 141360.3ms InterpolantComputationTime, 296 NumberOfCodeBlocks, 281 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 536 ConstructedInterpolants, 144 QuantifiedInterpolants, 12224 SizeOfPredicates, 183 NumberOfNonLiveVariables, 3374 ConjunctsInSsa, 340 ConjunctsInUnsatCore, 56 InterpolantComputations, 38 PerfectInterpolantSequences, 94/1024 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown