/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-send-receive.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 16:39:12,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 16:39:12,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 16:39:12,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-07 16:39:12,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 16:39:12,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 16:39:12,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 16:39:12,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 16:39:12,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 16:39:12,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 16:39:12,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 16:39:12,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 16:39:12,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 16:39:12,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 16:39:12,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 16:39:12,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 16:39:12,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-07 16:39:12,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-07 16:39:12,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-07 16:39:12,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-07 16:39:12,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-07 16:39:12,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-07 16:39:12,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-07 16:39:12,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-07 16:39:12,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-07 16:39:12,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 16:39:12,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 16:39:12,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 16:39:12,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 16:39:12,786 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 16:39:12,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 16:39:12,787 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 16:39:12,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 16:39:12,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 16:39:12,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 16:39:12,792 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 16:39:12,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 16:39:12,796 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 16:39:12,796 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 16:39:12,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 16:39:12,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 16:39:12,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 16:39:12,797 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 16:39:12,797 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 16:39:12,797 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 16:39:12,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 16:39:12,798 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 16:39:12,798 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 16:39:12,798 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 16:39:12,798 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 16:39:12,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 16:39:12,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 16:39:12,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 16:39:12,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 16:39:12,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:39:12,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 16:39:12,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 16:39:12,800 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 16:39:12,800 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 16:39:12,801 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 16:39:12,801 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 16:39:12,801 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 16:39:13,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 16:39:13,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 16:39:13,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 16:39:13,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 16:39:13,195 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 16:39:13,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2021-10-07 16:39:13,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb7e290f1/effd828886294cc5902e5a859c4e3b85/FLAG1344e3ef8 [2021-10-07 16:39:13,875 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 16:39:13,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2021-10-07 16:39:13,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb7e290f1/effd828886294cc5902e5a859c4e3b85/FLAG1344e3ef8 [2021-10-07 16:39:14,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb7e290f1/effd828886294cc5902e5a859c4e3b85 [2021-10-07 16:39:14,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 16:39:14,261 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 16:39:14,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 16:39:14,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 16:39:14,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 16:39:14,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:39:14" (1/1) ... [2021-10-07 16:39:14,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4817ec98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:14, skipping insertion in model container [2021-10-07 16:39:14,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:39:14" (1/1) ... [2021-10-07 16:39:14,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 16:39:14,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:39:14,497 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-send-receive.wvr.c[2728,2741] [2021-10-07 16:39:14,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:39:14,524 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-07 16:39:14,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:39:14,546 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-send-receive.wvr.c[2728,2741] [2021-10-07 16:39:14,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:39:14,562 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 16:39:14,590 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-send-receive.wvr.c[2728,2741] [2021-10-07 16:39:14,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:39:14,616 INFO L208 MainTranslator]: Completed translation [2021-10-07 16:39:14,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:14 WrapperNode [2021-10-07 16:39:14,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 16:39:14,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 16:39:14,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 16:39:14,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 16:39:14,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:14" (1/1) ... [2021-10-07 16:39:14,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:14" (1/1) ... [2021-10-07 16:39:14,674 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 16:39:14,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 16:39:14,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 16:39:14,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 16:39:14,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:14" (1/1) ... [2021-10-07 16:39:14,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:14" (1/1) ... [2021-10-07 16:39:14,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:14" (1/1) ... [2021-10-07 16:39:14,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:14" (1/1) ... [2021-10-07 16:39:14,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:14" (1/1) ... [2021-10-07 16:39:14,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:14" (1/1) ... [2021-10-07 16:39:14,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:14" (1/1) ... [2021-10-07 16:39:14,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 16:39:14,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 16:39:14,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 16:39:14,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 16:39:14,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:14" (1/1) ... [2021-10-07 16:39:14,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:39:14,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 16:39:14,772 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) [2021-10-07 16:39:14,790 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 [2021-10-07 16:39:14,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 16:39:14,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 16:39:14,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 16:39:14,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 16:39:14,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 16:39:14,836 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 16:39:14,836 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 16:39:14,836 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 16:39:14,836 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 16:39:14,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-07 16:39:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-07 16:39:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 16:39:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 16:39:14,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 16:39:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 16:39:14,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 16:39:14,839 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 16:39:15,988 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 16:39:15,988 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-07 16:39:15,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:39:15 BoogieIcfgContainer [2021-10-07 16:39:15,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 16:39:15,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 16:39:15,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 16:39:15,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 16:39:15,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 04:39:14" (1/3) ... [2021-10-07 16:39:15,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533ef8c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:39:15, skipping insertion in model container [2021-10-07 16:39:15,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:14" (2/3) ... [2021-10-07 16:39:15,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533ef8c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:39:15, skipping insertion in model container [2021-10-07 16:39:15,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:39:15" (3/3) ... [2021-10-07 16:39:16,000 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2021-10-07 16:39:16,006 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 16:39:16,006 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2021-10-07 16:39:16,006 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 16:39:16,044 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,044 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,044 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,045 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,045 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,045 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,045 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,046 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,047 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,048 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,048 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,048 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,048 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,049 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,049 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,049 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,049 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,050 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,050 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,050 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,051 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,051 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,051 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,052 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,052 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,052 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,052 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,053 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,053 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,053 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,053 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,053 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,054 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,054 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,054 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,054 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,055 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,055 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,055 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,055 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,056 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,056 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,056 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,056 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,057 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,057 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,057 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,057 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,058 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,058 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,058 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,059 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,059 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,059 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,059 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,060 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,060 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,060 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,060 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,060 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,061 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,061 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,061 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,061 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,062 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,062 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,065 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,066 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,066 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,066 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,066 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,067 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,069 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,069 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,072 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,072 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,072 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,072 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,073 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,073 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,073 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,073 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,074 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:16,081 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-07 16:39:16,132 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 16:39:16,140 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 [2021-10-07 16:39:16,140 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-10-07 16:39:16,157 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 16:39:16,170 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 147 transitions, 318 flow [2021-10-07 16:39:16,173 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 147 transitions, 318 flow [2021-10-07 16:39:16,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 147 places, 147 transitions, 318 flow [2021-10-07 16:39:16,243 INFO L129 PetriNetUnfolder]: 10/144 cut-off events. [2021-10-07 16:39:16,243 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-07 16:39:16,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 144 events. 10/144 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 157 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2021-10-07 16:39:16,253 INFO L116 LiptonReduction]: Number of co-enabled transitions 1692 [2021-10-07 16:39:36,924 INFO L131 LiptonReduction]: Checked pairs total: 3327 [2021-10-07 16:39:36,924 INFO L133 LiptonReduction]: Total number of compositions: 149 [2021-10-07 16:39:36,934 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 48 transitions, 120 flow [2021-10-07 16:39:36,986 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 582 states, 484 states have (on average 3.6012396694214877) internal successors, (1743), 581 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:39:36,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 582 states, 484 states have (on average 3.6012396694214877) internal successors, (1743), 581 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:39:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:39:36,997 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:39:36,998 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:39:36,998 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:39:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:39:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash 19966, now seen corresponding path program 1 times [2021-10-07 16:39:37,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:39:37,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093161696] [2021-10-07 16:39:37,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:39:37,019 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:39:37,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:39:37,026 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) [2021-10-07 16:39:37,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 16:39:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:39:37,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:39:37,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:39:37,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:39:37,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:39:37,640 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:39:37,642 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 [2021-10-07 16:39:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:37,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:39:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:37,833 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:39:37,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093161696] [2021-10-07 16:39:37,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093161696] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:39:37,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:39:37,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:39:37,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422596991] [2021-10-07 16:39:37,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:39:37,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:39:37,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:39:37,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:39:37,859 INFO L87 Difference]: Start difference. First operand has 582 states, 484 states have (on average 3.6012396694214877) internal successors, (1743), 581 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 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) [2021-10-07 16:39:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:39:38,385 INFO L93 Difference]: Finished difference Result 1162 states and 3487 transitions. [2021-10-07 16:39:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:39:38,390 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 [2021-10-07 16:39:38,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:39:38,439 INFO L225 Difference]: With dead ends: 1162 [2021-10-07 16:39:38,439 INFO L226 Difference]: Without dead ends: 1162 [2021-10-07 16:39:38,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:39:38,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-10-07 16:39:38,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 583. [2021-10-07 16:39:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 486 states have (on average 3.6049382716049383) internal successors, (1752), 582 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:39:38,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1752 transitions. [2021-10-07 16:39:38,564 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1752 transitions. Word has length 2 [2021-10-07 16:39:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:39:38,565 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 1752 transitions. [2021-10-07 16:39:38,565 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) [2021-10-07 16:39:38,566 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1752 transitions. [2021-10-07 16:39:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:39:38,566 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:39:38,566 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:39:38,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-07 16:39:38,779 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 [2021-10-07 16:39:38,780 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:39:38,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:39:38,781 INFO L82 PathProgramCache]: Analyzing trace with hash 19967, now seen corresponding path program 1 times [2021-10-07 16:39:38,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:39:38,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462659458] [2021-10-07 16:39:38,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:39:38,786 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:39:38,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:39:38,788 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) [2021-10-07 16:39:38,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 16:39:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:39:38,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:39:38,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:39:39,090 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:39:39,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:39:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:39,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:39:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:39,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:39:39,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462659458] [2021-10-07 16:39:39,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462659458] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:39:39,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:39:39,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:39:39,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903957589] [2021-10-07 16:39:39,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:39:39,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:39:39,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:39:39,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:39:39,746 INFO L87 Difference]: Start difference. First operand 583 states and 1752 transitions. 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) [2021-10-07 16:39:39,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:39:39,873 INFO L93 Difference]: Finished difference Result 582 states and 1749 transitions. [2021-10-07 16:39:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:39:39,874 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 [2021-10-07 16:39:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:39:39,881 INFO L225 Difference]: With dead ends: 582 [2021-10-07 16:39:39,881 INFO L226 Difference]: Without dead ends: 582 [2021-10-07 16:39:39,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:39:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-10-07 16:39:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2021-10-07 16:39:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 486 states have (on average 3.5987654320987654) internal successors, (1749), 581 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:39:39,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1749 transitions. [2021-10-07 16:39:39,918 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1749 transitions. Word has length 2 [2021-10-07 16:39:39,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:39:39,919 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 1749 transitions. [2021-10-07 16:39:39,919 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) [2021-10-07 16:39:39,919 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1749 transitions. [2021-10-07 16:39:39,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:39:39,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:39:39,920 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:39:39,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-07 16:39:40,133 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 [2021-10-07 16:39:40,133 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:39:40,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:39:40,134 INFO L82 PathProgramCache]: Analyzing trace with hash 20081, now seen corresponding path program 1 times [2021-10-07 16:39:40,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:39:40,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75756661] [2021-10-07 16:39:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:39:40,135 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:39:40,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:39:40,137 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) [2021-10-07 16:39:40,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 16:39:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:39:40,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:39:40,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:39:40,461 INFO L354 Elim1Store]: treesize reduction 358, result has 15.4 percent of original size [2021-10-07 16:39:40,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 217 treesize of output 250 [2021-10-07 16:39:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:44,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:39:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:44,046 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:39:44,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75756661] [2021-10-07 16:39:44,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75756661] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:39:44,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:39:44,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:39:44,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085408599] [2021-10-07 16:39:44,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:39:44,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:39:44,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:39:44,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:39:44,049 INFO L87 Difference]: Start difference. First operand 582 states and 1749 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) [2021-10-07 16:39:44,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:39:44,296 INFO L93 Difference]: Finished difference Result 501 states and 1466 transitions. [2021-10-07 16:39:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:39:44,297 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 [2021-10-07 16:39:44,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:39:44,302 INFO L225 Difference]: With dead ends: 501 [2021-10-07 16:39:44,303 INFO L226 Difference]: Without dead ends: 501 [2021-10-07 16:39:44,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:39:44,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-10-07 16:39:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2021-10-07 16:39:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 421 states have (on average 3.482185273159145) internal successors, (1466), 500 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:39:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1466 transitions. [2021-10-07 16:39:44,326 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1466 transitions. Word has length 2 [2021-10-07 16:39:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:39:44,327 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1466 transitions. [2021-10-07 16:39:44,327 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) [2021-10-07 16:39:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1466 transitions. [2021-10-07 16:39:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:39:44,328 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:39:44,328 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:39:44,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 16:39:44,541 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 [2021-10-07 16:39:44,542 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:39:44,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:39:44,543 INFO L82 PathProgramCache]: Analyzing trace with hash 20082, now seen corresponding path program 1 times [2021-10-07 16:39:44,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:39:44,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553652395] [2021-10-07 16:39:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:39:44,545 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:39:44,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:39:44,546 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) [2021-10-07 16:39:44,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 16:39:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:39:44,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 16:39:44,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:39:44,982 INFO L354 Elim1Store]: treesize reduction 245, result has 17.2 percent of original size [2021-10-07 16:39:44,983 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 70 treesize of output 104 [2021-10-07 16:39:45,001 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-07 16:39:45,001 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 698 treesize of output 678 [2021-10-07 16:39:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:48,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:39:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:48,103 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:39:48,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553652395] [2021-10-07 16:39:48,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553652395] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:39:48,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:39:48,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:39:48,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117235291] [2021-10-07 16:39:48,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:39:48,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:39:48,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:39:48,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:39:48,106 INFO L87 Difference]: Start difference. First operand 501 states and 1466 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) [2021-10-07 16:39:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:39:48,337 INFO L93 Difference]: Finished difference Result 420 states and 1183 transitions. [2021-10-07 16:39:48,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:39:48,338 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 [2021-10-07 16:39:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:39:48,342 INFO L225 Difference]: With dead ends: 420 [2021-10-07 16:39:48,342 INFO L226 Difference]: Without dead ends: 420 [2021-10-07 16:39:48,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:39:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-10-07 16:39:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2021-10-07 16:39:48,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 356 states have (on average 3.3230337078651684) internal successors, (1183), 419 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:39:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1183 transitions. [2021-10-07 16:39:48,360 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1183 transitions. Word has length 2 [2021-10-07 16:39:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:39:48,361 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1183 transitions. [2021-10-07 16:39:48,361 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) [2021-10-07 16:39:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1183 transitions. [2021-10-07 16:39:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:39:48,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:39:48,362 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 16:39:48,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-07 16:39:48,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:39:48,574 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:39:48,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:39:48,575 INFO L82 PathProgramCache]: Analyzing trace with hash 19311153, now seen corresponding path program 1 times [2021-10-07 16:39:48,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:39:48,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175290534] [2021-10-07 16:39:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:39:48,577 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:39:48,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:39:48,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:39:48,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 16:39:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:39:48,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 16:39:48,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:39:48,903 INFO L354 Elim1Store]: treesize reduction 239, result has 19.3 percent of original size [2021-10-07 16:39:48,903 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 51 treesize of output 91 [2021-10-07 16:39:48,909 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 146 treesize of output 142 [2021-10-07 16:39:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:52,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:39:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:52,451 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:39:52,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175290534] [2021-10-07 16:39:52,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175290534] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:39:52,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:39:52,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:39:52,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053394459] [2021-10-07 16:39:52,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:39:52,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:39:52,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:39:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:39:52,454 INFO L87 Difference]: Start difference. First operand 420 states and 1183 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-10-07 16:39:52,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:39:52,820 INFO L93 Difference]: Finished difference Result 399 states and 1133 transitions. [2021-10-07 16:39:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:39:52,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2021-10-07 16:39:52,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:39:52,825 INFO L225 Difference]: With dead ends: 399 [2021-10-07 16:39:52,825 INFO L226 Difference]: Without dead ends: 399 [2021-10-07 16:39:52,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:39:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-10-07 16:39:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2021-10-07 16:39:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 343 states have (on average 3.303206997084548) internal successors, (1133), 398 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:39:52,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1133 transitions. [2021-10-07 16:39:52,842 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1133 transitions. Word has length 4 [2021-10-07 16:39:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:39:52,842 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1133 transitions. [2021-10-07 16:39:52,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-10-07 16:39:52,843 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1133 transitions. [2021-10-07 16:39:52,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:39:52,843 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:39:52,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 16:39:52,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-07 16:39:53,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:39:53,057 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:39:53,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:39:53,058 INFO L82 PathProgramCache]: Analyzing trace with hash 19311154, now seen corresponding path program 1 times [2021-10-07 16:39:53,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:39:53,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90719038] [2021-10-07 16:39:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:39:53,059 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:39:53,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:39:53,061 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:39:53,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 16:39:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:39:53,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:39:53,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:39:53,367 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:39:53,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 73 treesize of output 116 [2021-10-07 16:39:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:58,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:39:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:58,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:39:58,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90719038] [2021-10-07 16:39:58,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90719038] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:39:58,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:39:58,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:39:58,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524792482] [2021-10-07 16:39:58,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:39:58,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:39:58,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:39:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:39:58,095 INFO L87 Difference]: Start difference. First operand 399 states and 1133 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-10-07 16:39:58,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:39:58,211 INFO L93 Difference]: Finished difference Result 378 states and 1083 transitions. [2021-10-07 16:39:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:39:58,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2021-10-07 16:39:58,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:39:58,215 INFO L225 Difference]: With dead ends: 378 [2021-10-07 16:39:58,216 INFO L226 Difference]: Without dead ends: 378 [2021-10-07 16:39:58,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:39:58,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-10-07 16:39:58,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-10-07 16:39:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 330 states have (on average 3.2818181818181817) internal successors, (1083), 377 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:39:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1083 transitions. [2021-10-07 16:39:58,232 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1083 transitions. Word has length 4 [2021-10-07 16:39:58,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:39:58,232 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1083 transitions. [2021-10-07 16:39:58,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-10-07 16:39:58,232 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1083 transitions. [2021-10-07 16:39:58,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:39:58,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:39:58,233 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 16:39:58,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 16:39:58,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:39:58,448 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:39:58,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:39:58,449 INFO L82 PathProgramCache]: Analyzing trace with hash 19311090, now seen corresponding path program 1 times [2021-10-07 16:39:58,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:39:58,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148170002] [2021-10-07 16:39:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:39:58,451 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:39:58,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:39:58,452 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) [2021-10-07 16:39:58,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 16:39:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:39:58,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:39:58,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:39:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:58,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:39:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:58,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:39:58,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148170002] [2021-10-07 16:39:58,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148170002] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:39:58,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:39:58,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:39:58,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625435213] [2021-10-07 16:39:58,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:39:58,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:39:58,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:39:58,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:39:58,571 INFO L87 Difference]: Start difference. First operand 378 states and 1083 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-10-07 16:39:58,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:39:58,661 INFO L93 Difference]: Finished difference Result 564 states and 1549 transitions. [2021-10-07 16:39:58,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:39:58,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2021-10-07 16:39:58,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:39:58,668 INFO L225 Difference]: With dead ends: 564 [2021-10-07 16:39:58,668 INFO L226 Difference]: Without dead ends: 559 [2021-10-07 16:39:58,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:39:58,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-10-07 16:39:58,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 465. [2021-10-07 16:39:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 403 states have (on average 3.3176178660049627) internal successors, (1337), 464 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:39:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1337 transitions. [2021-10-07 16:39:58,689 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1337 transitions. Word has length 4 [2021-10-07 16:39:58,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:39:58,690 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 1337 transitions. [2021-10-07 16:39:58,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-10-07 16:39:58,690 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1337 transitions. [2021-10-07 16:39:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:39:58,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:39:58,691 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 16:39:58,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-07 16:39:58,902 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 [2021-10-07 16:39:58,903 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:39:58,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:39:58,904 INFO L82 PathProgramCache]: Analyzing trace with hash 19307422, now seen corresponding path program 1 times [2021-10-07 16:39:58,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:39:58,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684519103] [2021-10-07 16:39:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:39:58,905 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:39:58,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:39:58,906 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) [2021-10-07 16:39:58,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 16:39:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:39:58,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:39:58,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:39:59,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:39:59,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:39:59,226 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:39:59,226 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 [2021-10-07 16:39:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:59,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:39:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:39:59,775 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:39:59,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684519103] [2021-10-07 16:39:59,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684519103] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:39:59,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:39:59,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:39:59,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420042694] [2021-10-07 16:39:59,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:39:59,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:39:59,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:39:59,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:39:59,778 INFO L87 Difference]: Start difference. First operand 465 states and 1337 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) [2021-10-07 16:40:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:40:01,280 INFO L93 Difference]: Finished difference Result 2769 states and 7990 transitions. [2021-10-07 16:40:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:40:01,281 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 [2021-10-07 16:40:01,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:40:01,304 INFO L225 Difference]: With dead ends: 2769 [2021-10-07 16:40:01,304 INFO L226 Difference]: Without dead ends: 2769 [2021-10-07 16:40:01,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 714.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:40:01,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-10-07 16:40:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 469. [2021-10-07 16:40:01,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 407 states have (on average 3.3046683046683047) internal successors, (1345), 468 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1345 transitions. [2021-10-07 16:40:01,348 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1345 transitions. Word has length 4 [2021-10-07 16:40:01,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:40:01,349 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1345 transitions. [2021-10-07 16:40:01,349 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) [2021-10-07 16:40:01,349 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1345 transitions. [2021-10-07 16:40:01,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:40:01,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:40:01,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:40:01,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-07 16:40:01,562 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 [2021-10-07 16:40:01,563 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:40:01,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:40:01,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1378162291, now seen corresponding path program 1 times [2021-10-07 16:40:01,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:40:01,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051594070] [2021-10-07 16:40:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:40:01,565 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:40:01,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:40:01,566 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) [2021-10-07 16:40:01,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 16:40:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:40:01,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:40:01,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:40:01,854 INFO L354 Elim1Store]: treesize reduction 247, result has 16.6 percent of original size [2021-10-07 16:40:01,855 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 50 treesize of output 82 [2021-10-07 16:40:01,874 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 114 treesize of output 112 [2021-10-07 16:40:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:02,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:40:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:02,534 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:40:02,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051594070] [2021-10-07 16:40:02,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051594070] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:40:02,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:40:02,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:40:02,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539904544] [2021-10-07 16:40:02,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:40:02,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:40:02,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:40:02,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:40:02,537 INFO L87 Difference]: Start difference. First operand 469 states and 1345 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2021-10-07 16:40:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:40:02,644 INFO L93 Difference]: Finished difference Result 415 states and 1187 transitions. [2021-10-07 16:40:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:40:02,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2021-10-07 16:40:02,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:40:02,650 INFO L225 Difference]: With dead ends: 415 [2021-10-07 16:40:02,650 INFO L226 Difference]: Without dead ends: 415 [2021-10-07 16:40:02,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:40:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-10-07 16:40:02,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2021-10-07 16:40:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 374 states have (on average 3.1737967914438503) internal successors, (1187), 414 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1187 transitions. [2021-10-07 16:40:02,669 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1187 transitions. Word has length 6 [2021-10-07 16:40:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:40:02,669 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1187 transitions. [2021-10-07 16:40:02,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2021-10-07 16:40:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1187 transitions. [2021-10-07 16:40:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:40:02,670 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:40:02,671 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:40:02,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 16:40:02,883 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 [2021-10-07 16:40:02,883 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:40:02,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:40:02,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1378162292, now seen corresponding path program 1 times [2021-10-07 16:40:02,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:40:02,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529338470] [2021-10-07 16:40:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:40:02,886 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:40:02,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:40:02,887 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) [2021-10-07 16:40:02,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-07 16:40:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:40:02,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:40:02,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:40:03,207 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:40:03,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:40:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:03,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:40:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:03,745 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:40:03,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529338470] [2021-10-07 16:40:03,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529338470] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:40:03,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:40:03,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:40:03,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60301866] [2021-10-07 16:40:03,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:40:03,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:40:03,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:40:03,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:40:03,746 INFO L87 Difference]: Start difference. First operand 415 states and 1187 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:40:03,806 INFO L93 Difference]: Finished difference Result 361 states and 1029 transitions. [2021-10-07 16:40:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:40:03,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 16:40:03,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:40:03,810 INFO L225 Difference]: With dead ends: 361 [2021-10-07 16:40:03,810 INFO L226 Difference]: Without dead ends: 360 [2021-10-07 16:40:03,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:40:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-10-07 16:40:03,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-10-07 16:40:03,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 340 states have (on average 3.0205882352941176) internal successors, (1027), 359 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:03,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1027 transitions. [2021-10-07 16:40:03,823 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1027 transitions. Word has length 6 [2021-10-07 16:40:03,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:40:03,824 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1027 transitions. [2021-10-07 16:40:03,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:03,824 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1027 transitions. [2021-10-07 16:40:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:40:03,825 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:40:03,825 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:40:03,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-07 16:40:04,037 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 [2021-10-07 16:40:04,038 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:40:04,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:40:04,038 INFO L82 PathProgramCache]: Analyzing trace with hash -226646311, now seen corresponding path program 1 times [2021-10-07 16:40:04,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:40:04,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89191520] [2021-10-07 16:40:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:40:04,039 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:40:04,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:40:04,041 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) [2021-10-07 16:40:04,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-07 16:40:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:40:04,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:40:04,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:40:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:04,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:40:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:04,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:40:04,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89191520] [2021-10-07 16:40:04,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89191520] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:40:04,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:40:04,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-07 16:40:04,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052071542] [2021-10-07 16:40:04,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:40:04,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:40:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:40:04,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:40:04,154 INFO L87 Difference]: Start difference. First operand 360 states and 1027 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:04,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:40:04,208 INFO L93 Difference]: Finished difference Result 392 states and 1073 transitions. [2021-10-07 16:40:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:40:04,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 [2021-10-07 16:40:04,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:40:04,211 INFO L225 Difference]: With dead ends: 392 [2021-10-07 16:40:04,211 INFO L226 Difference]: Without dead ends: 392 [2021-10-07 16:40:04,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:40:04,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-10-07 16:40:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 346. [2021-10-07 16:40:04,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 328 states have (on average 3.0701219512195124) internal successors, (1007), 345 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1007 transitions. [2021-10-07 16:40:04,224 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1007 transitions. Word has length 7 [2021-10-07 16:40:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:40:04,224 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 1007 transitions. [2021-10-07 16:40:04,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:04,225 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1007 transitions. [2021-10-07 16:40:04,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:40:04,226 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:40:04,226 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:40:04,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-07 16:40:04,438 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 [2021-10-07 16:40:04,439 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:40:04,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:40:04,439 INFO L82 PathProgramCache]: Analyzing trace with hash -226646310, now seen corresponding path program 1 times [2021-10-07 16:40:04,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:40:04,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266945026] [2021-10-07 16:40:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:40:04,441 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:40:04,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:40:04,442 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:40:04,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-07 16:40:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:40:04,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:40:04,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:40:04,715 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:40:04,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:40:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:05,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:40:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:05,266 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:40:05,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266945026] [2021-10-07 16:40:05,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266945026] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:40:05,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:40:05,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-07 16:40:05,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629376136] [2021-10-07 16:40:05,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:40:05,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:40:05,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:40:05,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:40:05,268 INFO L87 Difference]: Start difference. First operand 346 states and 1007 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:40:05,377 INFO L93 Difference]: Finished difference Result 236 states and 671 transitions. [2021-10-07 16:40:05,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:40:05,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:40:05,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:40:05,380 INFO L225 Difference]: With dead ends: 236 [2021-10-07 16:40:05,380 INFO L226 Difference]: Without dead ends: 236 [2021-10-07 16:40:05,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 16:40:05,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-07 16:40:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-10-07 16:40:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 228 states have (on average 2.942982456140351) internal successors, (671), 235 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 671 transitions. [2021-10-07 16:40:05,388 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 671 transitions. Word has length 7 [2021-10-07 16:40:05,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:40:05,389 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 671 transitions. [2021-10-07 16:40:05,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:05,389 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 671 transitions. [2021-10-07 16:40:05,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:40:05,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:40:05,390 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:40:05,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-07 16:40:05,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:40:05,602 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:40:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:40:05,603 INFO L82 PathProgramCache]: Analyzing trace with hash -226646308, now seen corresponding path program 1 times [2021-10-07 16:40:05,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:40:05,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117311982] [2021-10-07 16:40:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:40:05,605 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:40:05,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:40:05,606 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:40:05,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-07 16:40:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:40:05,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 16:40:05,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:40:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:05,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:40:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:05,819 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:40:05,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117311982] [2021-10-07 16:40:05,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117311982] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:40:05,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:40:05,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-07 16:40:05,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696598011] [2021-10-07 16:40:05,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 16:40:05,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:40:05,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 16:40:05,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:40:05,820 INFO L87 Difference]: Start difference. First operand 236 states and 671 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) [2021-10-07 16:40:05,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:40:05,938 INFO L93 Difference]: Finished difference Result 309 states and 824 transitions. [2021-10-07 16:40:05,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:40:05,939 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 [2021-10-07 16:40:05,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:40:05,942 INFO L225 Difference]: With dead ends: 309 [2021-10-07 16:40:05,942 INFO L226 Difference]: Without dead ends: 295 [2021-10-07 16:40:05,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-07 16:40:05,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-10-07 16:40:05,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 273. [2021-10-07 16:40:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 265 states have (on average 2.860377358490566) internal successors, (758), 272 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 758 transitions. [2021-10-07 16:40:05,952 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 758 transitions. Word has length 7 [2021-10-07 16:40:05,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:40:05,952 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 758 transitions. [2021-10-07 16:40:05,952 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) [2021-10-07 16:40:05,952 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 758 transitions. [2021-10-07 16:40:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:40:05,953 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:40:05,953 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:40:05,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-07 16:40:06,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:40:06,166 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:40:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:40:06,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1671171953, now seen corresponding path program 1 times [2021-10-07 16:40:06,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:40:06,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364950886] [2021-10-07 16:40:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:40:06,167 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:40:06,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:40:06,168 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) [2021-10-07 16:40:06,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-07 16:40:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:40:06,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 16:40:06,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:40:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:40:06,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:40:06,529 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:40:06,530 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 [2021-10-07 16:40:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:06,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:40:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:07,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:40:07,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364950886] [2021-10-07 16:40:07,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364950886] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:40:07,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:40:07,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:40:07,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792007279] [2021-10-07 16:40:07,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:40:07,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:40:07,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:40:07,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:40:07,614 INFO L87 Difference]: Start difference. First operand 273 states and 758 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) [2021-10-07 16:40:12,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:40:12,054 INFO L93 Difference]: Finished difference Result 577 states and 1572 transitions. [2021-10-07 16:40:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:40:12,057 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 [2021-10-07 16:40:12,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:40:12,060 INFO L225 Difference]: With dead ends: 577 [2021-10-07 16:40:12,060 INFO L226 Difference]: Without dead ends: 577 [2021-10-07 16:40:12,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3486.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:40:12,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-10-07 16:40:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 382. [2021-10-07 16:40:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 374 states have (on average 2.9010695187165774) internal successors, (1085), 381 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1085 transitions. [2021-10-07 16:40:12,074 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1085 transitions. Word has length 8 [2021-10-07 16:40:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:40:12,075 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1085 transitions. [2021-10-07 16:40:12,075 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) [2021-10-07 16:40:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1085 transitions. [2021-10-07 16:40:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:40:12,076 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:40:12,076 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-07 16:40:12,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-07 16:40:12,289 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 [2021-10-07 16:40:12,289 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:40:12,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:40:12,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1779007778, now seen corresponding path program 2 times [2021-10-07 16:40:12,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:40:12,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522222760] [2021-10-07 16:40:12,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:40:12,290 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:40:12,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:40:12,292 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) [2021-10-07 16:40:12,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-07 16:40:12,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:40:12,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:40:12,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-07 16:40:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:40:12,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:40:12,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:40:12,796 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:40:12,796 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 [2021-10-07 16:40:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:13,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:40:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:15,318 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:40:15,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522222760] [2021-10-07 16:40:15,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522222760] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:40:15,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:40:15,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:40:15,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283739037] [2021-10-07 16:40:15,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:40:15,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:40:15,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:40:15,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:40:15,320 INFO L87 Difference]: Start difference. First operand 382 states and 1085 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) [2021-10-07 16:40:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:40:24,390 INFO L93 Difference]: Finished difference Result 2739 states and 7778 transitions. [2021-10-07 16:40:24,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 16:40:24,392 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 [2021-10-07 16:40:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:40:24,409 INFO L225 Difference]: With dead ends: 2739 [2021-10-07 16:40:24,409 INFO L226 Difference]: Without dead ends: 2739 [2021-10-07 16:40:24,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 6826.4ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:40:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2021-10-07 16:40:24,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 390. [2021-10-07 16:40:24,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 2.8821989528795813) internal successors, (1101), 389 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1101 transitions. [2021-10-07 16:40:24,442 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1101 transitions. Word has length 8 [2021-10-07 16:40:24,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:40:24,442 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1101 transitions. [2021-10-07 16:40:24,442 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) [2021-10-07 16:40:24,443 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1101 transitions. [2021-10-07 16:40:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 16:40:24,444 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:40:24,444 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:40:24,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-07 16:40:24,656 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 [2021-10-07 16:40:24,657 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:40:24,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:40:24,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1587280796, now seen corresponding path program 2 times [2021-10-07 16:40:24,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:40:24,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713762060] [2021-10-07 16:40:24,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:40:24,659 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:40:24,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:40:24,660 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) [2021-10-07 16:40:24,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-07 16:40:24,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 16:40:24,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:40:24,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-07 16:40:24,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:40:24,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:40:24,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:40:25,165 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:40:25,165 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 [2021-10-07 16:40:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:40:25,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:40:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:40:26,621 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:40:26,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713762060] [2021-10-07 16:40:26,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713762060] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:40:26,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:40:26,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-07 16:40:26,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967875951] [2021-10-07 16:40:26,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 16:40:26,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:40:26,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 16:40:26,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:40:26,624 INFO L87 Difference]: Start difference. First operand 390 states and 1101 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) [2021-10-07 16:40:26,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:40:26,826 INFO L93 Difference]: Finished difference Result 304 states and 837 transitions. [2021-10-07 16:40:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:40:26,828 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 11 [2021-10-07 16:40:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:40:26,831 INFO L225 Difference]: With dead ends: 304 [2021-10-07 16:40:26,831 INFO L226 Difference]: Without dead ends: 304 [2021-10-07 16:40:26,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-07 16:40:26,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-10-07 16:40:26,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 185. [2021-10-07 16:40:26,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 2.612021857923497) internal successors, (478), 184 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 478 transitions. [2021-10-07 16:40:26,839 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 478 transitions. Word has length 11 [2021-10-07 16:40:26,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:40:26,839 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 478 transitions. [2021-10-07 16:40:26,839 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) [2021-10-07 16:40:26,839 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 478 transitions. [2021-10-07 16:40:26,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 16:40:26,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:40:26,841 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-07 16:40:26,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-07 16:40:27,047 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 [2021-10-07 16:40:27,048 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:40:27,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:40:27,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1023711906, now seen corresponding path program 3 times [2021-10-07 16:40:27,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:40:27,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130901617] [2021-10-07 16:40:27,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:40:27,050 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:40:27,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:40:27,051 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) [2021-10-07 16:40:27,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-07 16:40:27,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-07 16:40:27,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:40:27,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-07 16:40:27,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:40:27,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:40:27,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:40:27,771 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:40:27,771 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 [2021-10-07 16:40:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:28,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:40:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:36,818 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:40:36,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130901617] [2021-10-07 16:40:36,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130901617] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:40:36,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:40:36,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 16:40:36,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246192441] [2021-10-07 16:40:36,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 16:40:36,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:40:36,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 16:40:36,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:40:36,821 INFO L87 Difference]: Start difference. First operand 185 states and 478 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) [2021-10-07 16:40:52,438 WARN L207 SmtUtils]: Spent 11.34 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-07 16:41:01,239 WARN L207 SmtUtils]: Spent 7.91 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-07 16:41:08,965 WARN L207 SmtUtils]: Spent 6.71 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-07 16:41:16,276 WARN L207 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-07 16:41:22,813 WARN L207 SmtUtils]: Spent 5.41 s on a formula simplification that was a NOOP. DAG size: 125 [2021-10-07 16:41:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:41:48,093 INFO L93 Difference]: Finished difference Result 3891 states and 10594 transitions. [2021-10-07 16:41:48,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 16:41:48,095 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 [2021-10-07 16:41:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:41:48,122 INFO L225 Difference]: With dead ends: 3891 [2021-10-07 16:41:48,122 INFO L226 Difference]: Without dead ends: 3891 [2021-10-07 16:41:48,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 66599.1ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 16:41:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-10-07 16:41:48,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 201. [2021-10-07 16:41:48,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 199 states have (on average 2.562814070351759) internal successors, (510), 200 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:41:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 510 transitions. [2021-10-07 16:41:48,157 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 510 transitions. Word has length 16 [2021-10-07 16:41:48,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:41:48,157 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 510 transitions. [2021-10-07 16:41:48,158 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) [2021-10-07 16:41:48,158 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 510 transitions. [2021-10-07 16:41:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 16:41:48,159 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:41:48,159 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:41:48,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-07 16:41:48,359 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 [2021-10-07 16:41:48,360 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:41:48,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:41:48,361 INFO L82 PathProgramCache]: Analyzing trace with hash -165436184, now seen corresponding path program 1 times [2021-10-07 16:41:48,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:41:48,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130998088] [2021-10-07 16:41:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:41:48,363 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:41:48,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:41:48,364 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) [2021-10-07 16:41:48,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-07 16:41:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:41:48,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:41:48,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:41:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:41:48,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:41:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:41:48,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:41:48,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130998088] [2021-10-07 16:41:48,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130998088] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:41:48,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:41:48,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-07 16:41:48,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548540882] [2021-10-07 16:41:48,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:41:48,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:41:48,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:41:48,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:41:48,648 INFO L87 Difference]: Start difference. First operand 201 states and 510 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-10-07 16:41:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:41:48,678 INFO L93 Difference]: Finished difference Result 175 states and 387 transitions. [2021-10-07 16:41:48,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:41:48,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 18 [2021-10-07 16:41:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:41:48,680 INFO L225 Difference]: With dead ends: 175 [2021-10-07 16:41:48,680 INFO L226 Difference]: Without dead ends: 143 [2021-10-07 16:41:48,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:41:48,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-07 16:41:48,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 125. [2021-10-07 16:41:48,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 123 states have (on average 2.1463414634146343) internal successors, (264), 124 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:41:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 264 transitions. [2021-10-07 16:41:48,687 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 264 transitions. Word has length 18 [2021-10-07 16:41:48,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:41:48,688 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 264 transitions. [2021-10-07 16:41:48,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-10-07 16:41:48,688 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 264 transitions. [2021-10-07 16:41:48,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 16:41:48,689 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:41:48,689 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:41:48,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-07 16:41:48,905 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 [2021-10-07 16:41:48,906 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:41:48,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:41:48,906 INFO L82 PathProgramCache]: Analyzing trace with hash 554348486, now seen corresponding path program 2 times [2021-10-07 16:41:48,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:41:48,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216096712] [2021-10-07 16:41:48,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:41:48,908 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:41:48,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:41:48,909 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) [2021-10-07 16:41:48,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-07 16:41:49,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 16:41:49,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:41:49,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:41:49,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:41:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:41:49,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:41:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:41:49,293 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:41:49,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216096712] [2021-10-07 16:41:49,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216096712] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:41:49,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:41:49,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-07 16:41:49,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046583179] [2021-10-07 16:41:49,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 16:41:49,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:41:49,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 16:41:49,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:41:49,295 INFO L87 Difference]: Start difference. First operand 125 states and 264 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:41:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:41:49,350 INFO L93 Difference]: Finished difference Result 149 states and 323 transitions. [2021-10-07 16:41:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:41:49,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 16:41:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:41:49,352 INFO L225 Difference]: With dead ends: 149 [2021-10-07 16:41:49,352 INFO L226 Difference]: Without dead ends: 122 [2021-10-07 16:41:49,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-07 16:41:49,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-07 16:41:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-10-07 16:41:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 120 states have (on average 2.225) internal successors, (267), 121 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:41:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 267 transitions. [2021-10-07 16:41:49,357 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 267 transitions. Word has length 18 [2021-10-07 16:41:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:41:49,357 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 267 transitions. [2021-10-07 16:41:49,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:41:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 267 transitions. [2021-10-07 16:41:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:41:49,358 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:41:49,362 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:41:49,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-07 16:41:49,569 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 [2021-10-07 16:41:49,569 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:41:49,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:41:49,570 INFO L82 PathProgramCache]: Analyzing trace with hash 217859794, now seen corresponding path program 1 times [2021-10-07 16:41:49,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:41:49,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422564891] [2021-10-07 16:41:49,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:41:49,572 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:41:49,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:41:49,574 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) [2021-10-07 16:41:49,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-07 16:41:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:41:49,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 16:41:49,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:41:49,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-07 16:41:50,018 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 8 treesize of output 6 [2021-10-07 16:41:50,106 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-07 16:41:50,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 31 [2021-10-07 16:41:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:41:50,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:41:50,493 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 262 treesize of output 258 [2021-10-07 16:41:50,796 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-10-07 16:41:50,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 258 treesize of output 166 [2021-10-07 16:41:50,813 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 166 treesize of output 162 [2021-10-07 16:42:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:42:38,544 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:42:38,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422564891] [2021-10-07 16:42:38,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422564891] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:42:38,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:42:38,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-07 16:42:38,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598679845] [2021-10-07 16:42:38,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:42:38,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:42:38,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:42:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:42:38,546 INFO L87 Difference]: Start difference. First operand 122 states and 267 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:42:39,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:42:39,681 INFO L93 Difference]: Finished difference Result 162 states and 367 transitions. [2021-10-07 16:42:39,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:42:39,683 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 16:42:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:42:39,684 INFO L225 Difference]: With dead ends: 162 [2021-10-07 16:42:39,684 INFO L226 Difference]: Without dead ends: 150 [2021-10-07 16:42:39,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1124.5ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:42:39,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-07 16:42:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 138. [2021-10-07 16:42:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 136 states have (on average 2.286764705882353) internal successors, (311), 137 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:42:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 311 transitions. [2021-10-07 16:42:39,689 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 311 transitions. Word has length 23 [2021-10-07 16:42:39,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:42:39,690 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 311 transitions. [2021-10-07 16:42:39,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:42:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 311 transitions. [2021-10-07 16:42:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:42:39,691 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:42:39,691 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:42:39,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-07 16:42:39,894 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 [2021-10-07 16:42:39,895 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-07 16:42:39,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:42:39,898 INFO L82 PathProgramCache]: Analyzing trace with hash 37057850, now seen corresponding path program 2 times [2021-10-07 16:42:39,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:42:39,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979268378] [2021-10-07 16:42:39,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:42:39,899 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:42:39,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:42:39,901 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) [2021-10-07 16:42:39,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-07 16:42:40,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:42:40,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:42:40,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:42:40,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:42:40,236 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 59 treesize of output 57 [2021-10-07 16:42:40,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-07 16:42:40,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-10-07 16:42:40,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:42:40,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:42:40,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:42:40,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:42:40,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:42:40,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:42:41,163 INFO L354 Elim1Store]: treesize reduction 1157, result has 6.2 percent of original size [2021-10-07 16:42:41,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 79 treesize of output 99 [2021-10-07 16:42:45,693 INFO L354 Elim1Store]: treesize reduction 463, result has 0.2 percent of original size [2021-10-07 16:42:45,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 143 treesize of output 51 [2021-10-07 16:42:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:42:45,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:42:54,723 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:42:54,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979268378] [2021-10-07 16:42:54,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-07 16:42:54,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [106009104] [2021-10-07 16:42:54,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:42:54,725 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-07 16:42:54,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-07 16:42:54,727 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-07 16:42:54,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-07 16:42:55,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-07 16:42:55,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936580215] [2021-10-07 16:42:55,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:42:55,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 16:42:55,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 16:42:55,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 1 [2021-10-07 16:42:55,280 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 16:42:55,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-07 16:42:55,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:42:55,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:42:55,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-07 16:42:55,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:42:55,735 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 132 treesize of output 130 [2021-10-07 16:42:56,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-07 16:42:56,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-10-07 16:42:56,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:42:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:42:57,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:42:57,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:42:57,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:42:57,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:42:57,337 INFO L354 Elim1Store]: treesize reduction 1175, result has 6.2 percent of original size [2021-10-07 16:42:57,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 80 treesize of output 100 [2021-10-07 16:43:02,176 INFO L354 Elim1Store]: treesize reduction 1040, result has 1.2 percent of original size [2021-10-07 16:43:02,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 142 treesize of output 70 [2021-10-07 16:43:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:43:02,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:43:06,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-07 16:43:06,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:43:06,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-07 16:43:06,166 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-07 16:43:06,166 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-07 16:43:06,170 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:43:06,172 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:43:06,172 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:43:06,172 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:43:06,172 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:43:06,172 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:43:06,172 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:43:06,172 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 16:43:06,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 16:43:06,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 16:43:06,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 16:43:06,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 16:43:06,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 16:43:06,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 16:43:06,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 16:43:06,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-07 16:43:06,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-07 16:43:06,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-07 16:43:06,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-07 16:43:06,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-07 16:43:06,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-07 16:43:06,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:43:06,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 16:43:06,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 16:43:06,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-07 16:43:06,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:43:06,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:43:06,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:43:06,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:43:06,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:43:06,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:43:06,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-07 16:43:06,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-07 16:43:06,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 16:43:06,586 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 16:43:06,586 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 16:43:06,588 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transformations.BlockEncodingBacktranslator.translateProgramExecution(BlockEncodingBacktranslator.java:130) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:589) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-07 16:43:06,590 INFO L168 Benchmark]: Toolchain (without parser) took 232335.91 ms. Allocated memory was 151.0 MB in the beginning and 223.3 MB in the end (delta: 72.4 MB). Free memory was 126.6 MB in the beginning and 165.5 MB in the end (delta: -38.9 MB). Peak memory consumption was 137.2 MB. Max. memory is 8.0 GB. [2021-10-07 16:43:06,591 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 121.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 16:43:06,591 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.44 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 113.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:43:06,591 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.58 ms. Allocated memory is still 151.0 MB. Free memory was 113.0 MB in the beginning and 111.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:43:06,592 INFO L168 Benchmark]: Boogie Preprocessor took 39.06 ms. Allocated memory is still 151.0 MB. Free memory was 111.0 MB in the beginning and 109.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:43:06,592 INFO L168 Benchmark]: RCFGBuilder took 1276.34 ms. Allocated memory is still 151.0 MB. Free memory was 109.3 MB in the beginning and 119.0 MB in the end (delta: -9.7 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. [2021-10-07 16:43:06,592 INFO L168 Benchmark]: TraceAbstraction took 230596.52 ms. Allocated memory was 151.0 MB in the beginning and 223.3 MB in the end (delta: 72.4 MB). Free memory was 118.5 MB in the beginning and 165.5 MB in the end (delta: -47.0 MB). Peak memory consumption was 128.7 MB. Max. memory is 8.0 GB. [2021-10-07 16:43:06,596 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 121.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 352.44 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 113.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 55.58 ms. Allocated memory is still 151.0 MB. Free memory was 113.0 MB in the beginning and 111.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.06 ms. Allocated memory is still 151.0 MB. Free memory was 111.0 MB in the beginning and 109.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1276.34 ms. Allocated memory is still 151.0 MB. Free memory was 109.3 MB in the beginning and 119.0 MB in the end (delta: -9.7 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 230596.52 ms. Allocated memory was 151.0 MB in the beginning and 223.3 MB in the end (delta: 72.4 MB). Free memory was 118.5 MB in the beginning and 165.5 MB in the end (delta: -47.0 MB). Peak memory consumption was 128.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 20750.9ms, 147 PlacesBefore, 55 PlacesAfterwards, 147 TransitionsBefore, 48 TransitionsAfterwards, 1692 CoEnabledTransitionPairs, 6 FixpointIterations, 77 TrivialSequentialCompositions, 52 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 7 ChoiceCompositions, 149 TotalNumberOfCompositions, 3327 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2426, positive: 2351, positive conditional: 0, positive unconditional: 2351, negative: 75, negative conditional: 0, negative unconditional: 75, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1153, positive: 1126, positive conditional: 0, positive unconditional: 1126, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1153, positive: 1122, positive conditional: 0, positive unconditional: 1122, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 31, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1594, positive: 854, positive conditional: 0, positive unconditional: 854, negative: 740, negative conditional: 0, negative unconditional: 740, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2426, positive: 1225, positive conditional: 0, positive unconditional: 1225, negative: 48, negative conditional: 0, negative unconditional: 48, unknown: 1153, unknown conditional: 0, unknown unconditional: 1153] , Statistics on independence cache: Total cache size (in pairs): 126, Positive cache size: 117, Positive conditional cache size: 0, Positive unconditional cache size: 117, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9 - 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 - ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transformations.BlockEncodingBacktranslator.translateProgramExecution(BlockEncodingBacktranslator.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-07 16:43:06,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...