/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-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 21:35:18,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 21:35:18,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 21:35:18,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 21:35:18,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 21:35:18,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 21:35:18,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 21:35:18,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 21:35:18,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 21:35:18,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 21:35:18,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 21:35:18,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 21:35:18,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 21:35:18,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 21:35:18,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 21:35:18,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 21:35:18,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 21:35:18,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 21:35:18,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 21:35:18,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 21:35:18,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 21:35:18,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 21:35:18,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 21:35:18,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 21:35:18,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 21:35:18,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 21:35:18,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 21:35:18,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 21:35:18,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 21:35:18,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 21:35:18,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 21:35:18,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 21:35:18,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 21:35:18,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 21:35:18,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 21:35:18,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 21:35:18,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 21:35:18,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 21:35:18,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 21:35:18,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 21:35:18,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 21:35:18,269 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 21:35:18,328 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 21:35:18,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 21:35:18,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 21:35:18,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 21:35:18,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 21:35:18,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 21:35:18,333 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 21:35:18,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 21:35:18,333 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 21:35:18,333 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 21:35:18,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 21:35:18,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 21:35:18,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 21:35:18,335 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 21:35:18,335 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 21:35:18,336 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 21:35:18,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 21:35:18,336 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 21:35:18,336 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 21:35:18,336 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 21:35:18,337 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 21:35:18,337 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 21:35:18,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 21:35:18,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 21:35:18,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 21:35:18,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:35:18,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 21:35:18,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 21:35:18,339 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 21:35:18,339 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 21:35:18,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 21:35:18,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 21:35:18,340 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 21:35:18,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 21:35:18,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 21:35:18,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 21:35:18,812 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 21:35:18,815 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 21:35:18,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2021-10-13 21:35:18,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c54818449/726367d89ee741a08368024165454ecc/FLAGb5f7d48f1 [2021-10-13 21:35:19,650 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 21:35:19,652 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2021-10-13 21:35:19,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c54818449/726367d89ee741a08368024165454ecc/FLAGb5f7d48f1 [2021-10-13 21:35:19,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c54818449/726367d89ee741a08368024165454ecc [2021-10-13 21:35:19,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 21:35:19,978 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 21:35:19,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 21:35:19,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 21:35:19,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 21:35:19,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:35:19" (1/1) ... [2021-10-13 21:35:19,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@381f0ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:19, skipping insertion in model container [2021-10-13 21:35:19,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:35:19" (1/1) ... [2021-10-13 21:35:19,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 21:35:20,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:35:20,237 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-alt.wvr.c[2650,2663] [2021-10-13 21:35:20,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:35:20,269 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-13 21:35:20,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:35:20,291 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-alt.wvr.c[2650,2663] [2021-10-13 21:35:20,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:35:20,302 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 21:35:20,335 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-alt.wvr.c[2650,2663] [2021-10-13 21:35:20,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:35:20,365 INFO L208 MainTranslator]: Completed translation [2021-10-13 21:35:20,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:20 WrapperNode [2021-10-13 21:35:20,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 21:35:20,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 21:35:20,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 21:35:20,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 21:35:20,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:20" (1/1) ... [2021-10-13 21:35:20,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:20" (1/1) ... [2021-10-13 21:35:20,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 21:35:20,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 21:35:20,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 21:35:20,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 21:35:20,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:20" (1/1) ... [2021-10-13 21:35:20,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:20" (1/1) ... [2021-10-13 21:35:20,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:20" (1/1) ... [2021-10-13 21:35:20,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:20" (1/1) ... [2021-10-13 21:35:20,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:20" (1/1) ... [2021-10-13 21:35:20,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:20" (1/1) ... [2021-10-13 21:35:20,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:20" (1/1) ... [2021-10-13 21:35:20,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 21:35:20,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 21:35:20,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 21:35:20,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 21:35:20,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:20" (1/1) ... [2021-10-13 21:35:20,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:35:20,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 21:35:20,527 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) [2021-10-13 21:35:20,553 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 [2021-10-13 21:35:20,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 21:35:20,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 21:35:20,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 21:35:20,624 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 21:35:20,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 21:35:20,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 21:35:20,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 21:35:20,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 21:35:20,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 21:35:20,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 21:35:20,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 21:35:20,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 21:35:20,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 21:35:20,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 21:35:20,629 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 21:35:21,856 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 21:35:21,857 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-10-13 21:35:21,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:35:21 BoogieIcfgContainer [2021-10-13 21:35:21,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 21:35:21,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 21:35:21,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 21:35:21,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 21:35:21,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:35:19" (1/3) ... [2021-10-13 21:35:21,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126cdb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:35:21, skipping insertion in model container [2021-10-13 21:35:21,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:20" (2/3) ... [2021-10-13 21:35:21,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126cdb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:35:21, skipping insertion in model container [2021-10-13 21:35:21,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:35:21" (3/3) ... [2021-10-13 21:35:21,871 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2021-10-13 21:35:21,879 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 21:35:21,879 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-10-13 21:35:21,880 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 21:35:21,943 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,943 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,944 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,944 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,944 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,945 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,945 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,945 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,945 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,946 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,946 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,946 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,947 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,947 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,947 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,947 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,948 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,949 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,949 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,949 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,950 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,950 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,950 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,951 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,952 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,952 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,952 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,953 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,954 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,956 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,956 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,956 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,957 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,957 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,957 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,957 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,957 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,957 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,958 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,958 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,958 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,958 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,958 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,959 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,959 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,959 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,959 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,960 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,960 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,960 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,960 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,961 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,961 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,961 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,962 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,962 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,962 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,963 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,963 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,963 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,964 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,964 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,965 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,966 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,966 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,966 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,967 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,967 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,967 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,967 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,967 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,968 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,968 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,969 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,969 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,969 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,970 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,970 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,973 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,974 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,974 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,975 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,975 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,975 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,975 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,977 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,978 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,978 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,978 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,979 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,980 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,981 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,984 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,990 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,990 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:21,999 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-13 21:35:22,081 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 21:35:22,092 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 [2021-10-13 21:35:22,092 INFO L340 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2021-10-13 21:35:22,116 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 21:35:22,131 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 136 transitions, 288 flow [2021-10-13 21:35:22,141 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 136 transitions, 288 flow [2021-10-13 21:35:22,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 132 places, 136 transitions, 288 flow [2021-10-13 21:35:22,238 INFO L129 PetriNetUnfolder]: 11/134 cut-off events. [2021-10-13 21:35:22,238 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-13 21:35:22,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 134 events. 11/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 152 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2021-10-13 21:35:22,252 INFO L116 LiptonReduction]: Number of co-enabled transitions 1180 [2021-10-13 21:35:41,447 INFO L131 LiptonReduction]: Checked pairs total: 1528 [2021-10-13 21:35:41,448 INFO L133 LiptonReduction]: Total number of compositions: 152 [2021-10-13 21:35:41,459 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 36 transitions, 88 flow [2021-10-13 21:35:41,480 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 166 states, 100 states have (on average 4.07) internal successors, (407), 165 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 166 states, 100 states have (on average 4.07) internal successors, (407), 165 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:41,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:35:41,490 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:41,491 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:35:41,492 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:35:41,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:41,501 INFO L82 PathProgramCache]: Analyzing trace with hash 19490, now seen corresponding path program 1 times [2021-10-13 21:35:41,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:41,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968135616] [2021-10-13 21:35:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:35:41,515 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:41,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:41,519 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) [2021-10-13 21:35:41,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 21:35:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:35:41,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:35:41,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:41,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:41,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:42,080 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:35:42,081 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 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:35:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:42,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:42,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:42,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968135616] [2021-10-13 21:35:42,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968135616] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:35:42,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:35:42,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:35:42,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21856394] [2021-10-13 21:35:42,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:35:42,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:42,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:35:42,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:35:42,360 INFO L87 Difference]: Start difference. First operand has 166 states, 100 states have (on average 4.07) internal successors, (407), 165 states have internal predecessors, (407), 0 states have call successors, (0), 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) [2021-10-13 21:35:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:42,807 INFO L93 Difference]: Finished difference Result 330 states and 815 transitions. [2021-10-13 21:35:42,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:35:42,812 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 [2021-10-13 21:35:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:42,828 INFO L225 Difference]: With dead ends: 330 [2021-10-13 21:35:42,829 INFO L226 Difference]: Without dead ends: 330 [2021-10-13 21:35:42,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:35:42,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-10-13 21:35:42,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 167. [2021-10-13 21:35:42,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 102 states have (on average 4.078431372549019) internal successors, (416), 166 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2021-10-13 21:35:42,894 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 2 [2021-10-13 21:35:42,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:42,895 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2021-10-13 21:35:42,896 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) [2021-10-13 21:35:42,896 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2021-10-13 21:35:42,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:35:42,896 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:42,896 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:35:42,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-13 21:35:43,107 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 [2021-10-13 21:35:43,108 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:35:43,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:43,110 INFO L82 PathProgramCache]: Analyzing trace with hash 19491, now seen corresponding path program 1 times [2021-10-13 21:35:43,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:43,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523759583] [2021-10-13 21:35:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:35:43,111 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:43,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:43,114 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) [2021-10-13 21:35:43,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 21:35:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:35:43,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:35:43,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:43,348 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 21:35:43,348 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 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-13 21:35:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:43,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:43,842 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:43,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523759583] [2021-10-13 21:35:43,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523759583] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:35:43,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:35:43,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:35:43,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992117546] [2021-10-13 21:35:43,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:35:43,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:43,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:35:43,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:35:43,846 INFO L87 Difference]: Start difference. First operand 167 states and 416 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) [2021-10-13 21:35:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:43,938 INFO L93 Difference]: Finished difference Result 166 states and 413 transitions. [2021-10-13 21:35:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:35:43,939 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 [2021-10-13 21:35:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:43,942 INFO L225 Difference]: With dead ends: 166 [2021-10-13 21:35:43,942 INFO L226 Difference]: Without dead ends: 166 [2021-10-13 21:35:43,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:35:43,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-13 21:35:43,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-10-13 21:35:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 102 states have (on average 4.049019607843137) internal successors, (413), 165 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2021-10-13 21:35:43,961 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 2 [2021-10-13 21:35:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:43,961 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2021-10-13 21:35:43,961 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) [2021-10-13 21:35:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2021-10-13 21:35:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:35:43,962 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:43,962 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:35:43,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:44,163 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 [2021-10-13 21:35:44,164 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:35:44,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:44,165 INFO L82 PathProgramCache]: Analyzing trace with hash 19591, now seen corresponding path program 1 times [2021-10-13 21:35:44,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:44,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547754544] [2021-10-13 21:35:44,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:35:44,167 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:44,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:44,168 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) [2021-10-13 21:35:44,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 21:35:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:35:44,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:35:44,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:44,439 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 21:35:44,440 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 6 case distinctions, treesize of input 105 treesize of output 138 [2021-10-13 21:35:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:45,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:45,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:45,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547754544] [2021-10-13 21:35:45,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547754544] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:35:45,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:35:45,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:35:45,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973890848] [2021-10-13 21:35:45,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:35:45,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:45,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:35:45,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:35:45,949 INFO L87 Difference]: Start difference. First operand 166 states and 413 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) [2021-10-13 21:35:46,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:46,061 INFO L93 Difference]: Finished difference Result 137 states and 326 transitions. [2021-10-13 21:35:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:35:46,062 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 [2021-10-13 21:35:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:46,064 INFO L225 Difference]: With dead ends: 137 [2021-10-13 21:35:46,064 INFO L226 Difference]: Without dead ends: 137 [2021-10-13 21:35:46,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:35:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-13 21:35:46,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-10-13 21:35:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 89 states have (on average 3.662921348314607) internal successors, (326), 136 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 326 transitions. [2021-10-13 21:35:46,078 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 326 transitions. Word has length 2 [2021-10-13 21:35:46,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:46,078 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 326 transitions. [2021-10-13 21:35:46,078 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) [2021-10-13 21:35:46,078 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 326 transitions. [2021-10-13 21:35:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:35:46,079 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:46,079 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:35:46,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:46,291 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 [2021-10-13 21:35:46,292 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:35:46,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:46,293 INFO L82 PathProgramCache]: Analyzing trace with hash 19592, now seen corresponding path program 1 times [2021-10-13 21:35:46,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:46,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548652570] [2021-10-13 21:35:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:35:46,294 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:46,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:46,295 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) [2021-10-13 21:35:46,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 21:35:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:35:46,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:35:46,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:46,569 INFO L354 Elim1Store]: treesize reduction 151, result has 21.8 percent of original size [2021-10-13 21:35:46,570 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 4 case distinctions, treesize of input 46 treesize of output 74 [2021-10-13 21:35:46,578 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 96 treesize of output 94 [2021-10-13 21:35:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:46,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:47,004 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:47,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548652570] [2021-10-13 21:35:47,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548652570] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:35:47,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:35:47,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:35:47,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925185851] [2021-10-13 21:35:47,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:35:47,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:47,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:35:47,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:35:47,007 INFO L87 Difference]: Start difference. First operand 137 states and 326 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) [2021-10-13 21:35:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:47,134 INFO L93 Difference]: Finished difference Result 108 states and 239 transitions. [2021-10-13 21:35:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:35:47,136 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 [2021-10-13 21:35:47,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:47,137 INFO L225 Difference]: With dead ends: 108 [2021-10-13 21:35:47,137 INFO L226 Difference]: Without dead ends: 108 [2021-10-13 21:35:47,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:35:47,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-13 21:35:47,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-10-13 21:35:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 76 states have (on average 3.1447368421052633) internal successors, (239), 107 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 239 transitions. [2021-10-13 21:35:47,147 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 239 transitions. Word has length 2 [2021-10-13 21:35:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:47,147 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 239 transitions. [2021-10-13 21:35:47,147 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) [2021-10-13 21:35:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 239 transitions. [2021-10-13 21:35:47,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:35:47,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:47,148 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-13 21:35:47,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:47,353 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 [2021-10-13 21:35:47,354 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:35:47,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:47,355 INFO L82 PathProgramCache]: Analyzing trace with hash 18827810, now seen corresponding path program 1 times [2021-10-13 21:35:47,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:47,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355500272] [2021-10-13 21:35:47,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:35:47,357 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:47,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:47,358 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) [2021-10-13 21:35:47,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 21:35:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:35:47,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:35:47,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:47,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:47,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:47,598 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:35:47,599 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 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:35:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:47,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:48,333 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:48,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355500272] [2021-10-13 21:35:48,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355500272] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:35:48,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:35:48,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:35:48,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961098890] [2021-10-13 21:35:48,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:35:48,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:48,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:35:48,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:35:48,342 INFO L87 Difference]: Start difference. First operand 108 states and 239 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) [2021-10-13 21:35:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:49,715 INFO L93 Difference]: Finished difference Result 627 states and 1402 transitions. [2021-10-13 21:35:49,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:35:49,718 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 [2021-10-13 21:35:49,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:49,723 INFO L225 Difference]: With dead ends: 627 [2021-10-13 21:35:49,723 INFO L226 Difference]: Without dead ends: 627 [2021-10-13 21:35:49,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 820.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:35:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-10-13 21:35:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 112. [2021-10-13 21:35:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 80 states have (on average 3.0875) internal successors, (247), 111 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 247 transitions. [2021-10-13 21:35:49,742 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 247 transitions. Word has length 4 [2021-10-13 21:35:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:49,743 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 247 transitions. [2021-10-13 21:35:49,743 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) [2021-10-13 21:35:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 247 transitions. [2021-10-13 21:35:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:35:49,744 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:49,744 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 21:35:49,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:49,955 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 [2021-10-13 21:35:49,956 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:35:49,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:49,957 INFO L82 PathProgramCache]: Analyzing trace with hash 18842641, now seen corresponding path program 1 times [2021-10-13 21:35:49,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:49,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903433389] [2021-10-13 21:35:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:35:49,959 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:49,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:49,960 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) [2021-10-13 21:35:49,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 21:35:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:35:50,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:35:50,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:50,172 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 21:35:50,173 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 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-13 21:35:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:50,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:50,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:50,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903433389] [2021-10-13 21:35:50,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903433389] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:35:50,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:35:50,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 21:35:50,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317799048] [2021-10-13 21:35:50,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:35:50,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:50,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:35:50,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:35:50,616 INFO L87 Difference]: Start difference. First operand 112 states and 247 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) [2021-10-13 21:35:50,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:50,741 INFO L93 Difference]: Finished difference Result 74 states and 158 transitions. [2021-10-13 21:35:50,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:35:50,742 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 4 [2021-10-13 21:35:50,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:50,743 INFO L225 Difference]: With dead ends: 74 [2021-10-13 21:35:50,743 INFO L226 Difference]: Without dead ends: 74 [2021-10-13 21:35:50,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 21:35:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-13 21:35:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-13 21:35:50,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 57 states have (on average 2.7719298245614037) internal successors, (158), 73 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:50,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 158 transitions. [2021-10-13 21:35:50,752 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 158 transitions. Word has length 4 [2021-10-13 21:35:50,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:50,753 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 158 transitions. [2021-10-13 21:35:50,756 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) [2021-10-13 21:35:50,757 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 158 transitions. [2021-10-13 21:35:50,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:35:50,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:50,757 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 21:35:50,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:50,958 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 [2021-10-13 21:35:50,959 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:35:50,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:50,960 INFO L82 PathProgramCache]: Analyzing trace with hash 18842642, now seen corresponding path program 1 times [2021-10-13 21:35:50,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:50,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141612923] [2021-10-13 21:35:50,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:35:50,962 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:50,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:50,963 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) [2021-10-13 21:35:50,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 21:35:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:35:51,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:35:51,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:51,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:51,094 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:51,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141612923] [2021-10-13 21:35:51,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141612923] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:35:51,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:35:51,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:35:51,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919711925] [2021-10-13 21:35:51,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:35:51,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:51,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:35:51,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:35:51,099 INFO L87 Difference]: Start difference. First operand 74 states and 158 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) [2021-10-13 21:35:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:51,207 INFO L93 Difference]: Finished difference Result 102 states and 205 transitions. [2021-10-13 21:35:51,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:35:51,210 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 [2021-10-13 21:35:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:51,211 INFO L225 Difference]: With dead ends: 102 [2021-10-13 21:35:51,211 INFO L226 Difference]: Without dead ends: 102 [2021-10-13 21:35:51,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:35:51,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-13 21:35:51,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2021-10-13 21:35:51,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 2.6065573770491803) internal successors, (159), 75 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 159 transitions. [2021-10-13 21:35:51,220 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 159 transitions. Word has length 4 [2021-10-13 21:35:51,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:51,221 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 159 transitions. [2021-10-13 21:35:51,221 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) [2021-10-13 21:35:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 159 transitions. [2021-10-13 21:35:51,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:35:51,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:51,222 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 21:35:51,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:51,423 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 [2021-10-13 21:35:51,423 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:35:51,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:51,424 INFO L82 PathProgramCache]: Analyzing trace with hash 18842662, now seen corresponding path program 1 times [2021-10-13 21:35:51,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:51,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835064165] [2021-10-13 21:35:51,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:35:51,426 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:51,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:51,427 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) [2021-10-13 21:35:51,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 21:35:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:35:51,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:35:51,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:51,636 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 21:35:51,637 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 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-13 21:35:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:52,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:52,023 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:52,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835064165] [2021-10-13 21:35:52,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835064165] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:35:52,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:35:52,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:35:52,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793662685] [2021-10-13 21:35:52,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:35:52,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:52,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:35:52,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:35:52,026 INFO L87 Difference]: Start difference. First operand 76 states and 159 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-10-13 21:35:52,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:52,098 INFO L93 Difference]: Finished difference Result 69 states and 146 transitions. [2021-10-13 21:35:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:35:52,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 4 [2021-10-13 21:35:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:52,099 INFO L225 Difference]: With dead ends: 69 [2021-10-13 21:35:52,099 INFO L226 Difference]: Without dead ends: 69 [2021-10-13 21:35:52,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:35:52,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-13 21:35:52,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-13 21:35:52,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 2.5172413793103448) internal successors, (146), 68 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:52,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 146 transitions. [2021-10-13 21:35:52,104 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 146 transitions. Word has length 4 [2021-10-13 21:35:52,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:52,105 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 146 transitions. [2021-10-13 21:35:52,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-10-13 21:35:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 146 transitions. [2021-10-13 21:35:52,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:35:52,105 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:52,106 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 21:35:52,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:52,316 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 [2021-10-13 21:35:52,317 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:35:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:52,318 INFO L82 PathProgramCache]: Analyzing trace with hash 18842663, now seen corresponding path program 1 times [2021-10-13 21:35:52,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:52,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812972819] [2021-10-13 21:35:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:35:52,319 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:52,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:52,322 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) [2021-10-13 21:35:52,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 21:35:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:35:52,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:35:52,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:52,575 INFO L354 Elim1Store]: treesize reduction 155, result has 19.7 percent of original size [2021-10-13 21:35:52,575 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 4 case distinctions, treesize of input 41 treesize of output 65 [2021-10-13 21:35:52,581 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 92 treesize of output 90 [2021-10-13 21:35:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:55,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:55,067 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:55,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812972819] [2021-10-13 21:35:55,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812972819] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:35:55,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:35:55,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:35:55,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301877480] [2021-10-13 21:35:55,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:35:55,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:55,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:35:55,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:35:55,071 INFO L87 Difference]: Start difference. First operand 69 states and 146 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) [2021-10-13 21:35:55,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:55,177 INFO L93 Difference]: Finished difference Result 62 states and 133 transitions. [2021-10-13 21:35:55,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:35:55,178 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 [2021-10-13 21:35:55,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:55,179 INFO L225 Difference]: With dead ends: 62 [2021-10-13 21:35:55,179 INFO L226 Difference]: Without dead ends: 62 [2021-10-13 21:35:55,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2042.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:35:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-13 21:35:55,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-13 21:35:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 55 states have (on average 2.418181818181818) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 133 transitions. [2021-10-13 21:35:55,183 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 133 transitions. Word has length 4 [2021-10-13 21:35:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:55,184 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 133 transitions. [2021-10-13 21:35:55,184 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) [2021-10-13 21:35:55,184 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 133 transitions. [2021-10-13 21:35:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:35:55,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:55,185 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:35:55,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:55,385 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 [2021-10-13 21:35:55,386 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:35:55,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:55,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1298487222, now seen corresponding path program 1 times [2021-10-13 21:35:55,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:55,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625592180] [2021-10-13 21:35:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:35:55,389 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:55,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:55,390 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) [2021-10-13 21:35:55,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 21:35:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:35:55,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:35:55,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:55,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:55,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:55,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625592180] [2021-10-13 21:35:55,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625592180] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:35:55,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:35:55,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 21:35:55,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739501424] [2021-10-13 21:35:55,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:35:55,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:35:55,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:35:55,597 INFO L87 Difference]: Start difference. First operand 62 states and 133 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) [2021-10-13 21:35:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:55,736 INFO L93 Difference]: Finished difference Result 87 states and 172 transitions. [2021-10-13 21:35:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:35:55,738 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 [2021-10-13 21:35:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:55,739 INFO L225 Difference]: With dead ends: 87 [2021-10-13 21:35:55,739 INFO L226 Difference]: Without dead ends: 87 [2021-10-13 21:35:55,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 21:35:55,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-13 21:35:55,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-10-13 21:35:55,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 72 states have (on average 2.2777777777777777) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-10-13 21:35:55,743 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 7 [2021-10-13 21:35:55,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:55,743 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-10-13 21:35:55,743 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) [2021-10-13 21:35:55,743 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-10-13 21:35:55,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:35:55,744 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:55,744 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-13 21:35:55,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-13 21:35:55,947 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 [2021-10-13 21:35:55,948 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:35:55,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:55,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1944503842, now seen corresponding path program 2 times [2021-10-13 21:35:55,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:55,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651786114] [2021-10-13 21:35:55,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:35:55,950 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:55,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:55,951 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) [2021-10-13 21:35:55,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 21:35:56,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:35:56,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:35:56,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 21:35:56,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:56,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:56,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:56,239 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:35:56,240 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 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:35:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:56,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:58,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:58,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651786114] [2021-10-13 21:35:58,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651786114] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:35:58,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:35:58,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 21:35:58,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101071569] [2021-10-13 21:35:58,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:35:58,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:58,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:35:58,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:35:58,168 INFO L87 Difference]: Start difference. First operand 79 states and 164 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) [2021-10-13 21:36:05,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:36:05,199 INFO L93 Difference]: Finished difference Result 731 states and 1592 transitions. [2021-10-13 21:36:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 21:36:05,201 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 [2021-10-13 21:36:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:36:05,209 INFO L225 Difference]: With dead ends: 731 [2021-10-13 21:36:05,209 INFO L226 Difference]: Without dead ends: 731 [2021-10-13 21:36:05,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5469.7ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:36:05,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-10-13 21:36:05,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 87. [2021-10-13 21:36:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 80 states have (on average 2.25) internal successors, (180), 86 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 180 transitions. [2021-10-13 21:36:05,225 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 180 transitions. Word has length 8 [2021-10-13 21:36:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:36:05,225 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 180 transitions. [2021-10-13 21:36:05,226 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) [2021-10-13 21:36:05,226 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 180 transitions. [2021-10-13 21:36:05,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:36:05,228 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:36:05,228 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:36:05,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 21:36:05,438 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 [2021-10-13 21:36:05,438 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:36:05,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:36:05,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1910561190, now seen corresponding path program 1 times [2021-10-13 21:36:05,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:36:05,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690958396] [2021-10-13 21:36:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:36:05,440 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:36:05,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:36:05,442 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) [2021-10-13 21:36:05,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 21:36:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:36:05,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 21:36:05,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:36:05,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:36:05,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:36:05,764 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:36:05,764 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 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:36:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:06,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:36:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:07,059 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:36:07,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690958396] [2021-10-13 21:36:07,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690958396] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:36:07,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:36:07,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:36:07,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221179673] [2021-10-13 21:36:07,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:36:07,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:36:07,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:36:07,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:36:07,061 INFO L87 Difference]: Start difference. First operand 87 states and 180 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) [2021-10-13 21:36:08,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:36:08,681 INFO L93 Difference]: Finished difference Result 153 states and 306 transitions. [2021-10-13 21:36:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 21:36:08,683 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 [2021-10-13 21:36:08,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:36:08,684 INFO L225 Difference]: With dead ends: 153 [2021-10-13 21:36:08,684 INFO L226 Difference]: Without dead ends: 153 [2021-10-13 21:36:08,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1084.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:36:08,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-13 21:36:08,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 108. [2021-10-13 21:36:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 101 states have (on average 2.287128712871287) internal successors, (231), 107 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:08,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 231 transitions. [2021-10-13 21:36:08,690 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 231 transitions. Word has length 8 [2021-10-13 21:36:08,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:36:08,691 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 231 transitions. [2021-10-13 21:36:08,691 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) [2021-10-13 21:36:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 231 transitions. [2021-10-13 21:36:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 21:36:08,692 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:36:08,692 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:36:08,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 21:36:08,904 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 [2021-10-13 21:36:08,904 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:36:08,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:36:08,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1361990582, now seen corresponding path program 2 times [2021-10-13 21:36:08,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:36:08,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82921133] [2021-10-13 21:36:08,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:36:08,907 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:36:08,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:36:08,908 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) [2021-10-13 21:36:08,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 21:36:09,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 21:36:09,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:36:09,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 21:36:09,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:36:09,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:36:09,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:36:09,200 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:36:09,200 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 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:36:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 21:36:09,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:36:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 21:36:10,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:36:10,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82921133] [2021-10-13 21:36:10,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82921133] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:36:10,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:36:10,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 21:36:10,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403923733] [2021-10-13 21:36:10,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:36:10,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:36:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:36:10,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:36:10,548 INFO L87 Difference]: Start difference. First operand 108 states and 231 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) [2021-10-13 21:36:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:36:10,704 INFO L93 Difference]: Finished difference Result 84 states and 173 transitions. [2021-10-13 21:36:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:36:10,706 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 [2021-10-13 21:36:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:36:10,707 INFO L225 Difference]: With dead ends: 84 [2021-10-13 21:36:10,707 INFO L226 Difference]: Without dead ends: 84 [2021-10-13 21:36:10,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 21:36:10,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-13 21:36:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2021-10-13 21:36:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 2.0) internal successors, (122), 62 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 122 transitions. [2021-10-13 21:36:10,710 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 122 transitions. Word has length 11 [2021-10-13 21:36:10,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:36:10,710 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 122 transitions. [2021-10-13 21:36:10,710 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) [2021-10-13 21:36:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 122 transitions. [2021-10-13 21:36:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 21:36:10,711 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:36:10,712 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:36:10,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 21:36:10,924 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 [2021-10-13 21:36:10,924 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:36:10,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:36:10,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1719508240, now seen corresponding path program 1 times [2021-10-13 21:36:10,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:36:10,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758141314] [2021-10-13 21:36:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:36:10,927 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:36:10,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:36:10,928 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) [2021-10-13 21:36:10,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 21:36:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:36:11,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:36:11,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:36:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:11,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:36:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:11,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:36:11,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758141314] [2021-10-13 21:36:11,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758141314] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:36:11,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:36:11,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:36:11,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644074504] [2021-10-13 21:36:11,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:36:11,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:36:11,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:36:11,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:36:11,198 INFO L87 Difference]: Start difference. First operand 63 states and 122 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:11,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:36:11,216 INFO L93 Difference]: Finished difference Result 76 states and 151 transitions. [2021-10-13 21:36:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:36:11,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 21:36:11,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:36:11,217 INFO L225 Difference]: With dead ends: 76 [2021-10-13 21:36:11,217 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 21:36:11,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:36:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 21:36:11,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-13 21:36:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 2.0) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 80 transitions. [2021-10-13 21:36:11,221 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 80 transitions. Word has length 13 [2021-10-13 21:36:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:36:11,221 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 80 transitions. [2021-10-13 21:36:11,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 80 transitions. [2021-10-13 21:36:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 21:36:11,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:36:11,222 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-13 21:36:11,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 21:36:11,430 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 [2021-10-13 21:36:11,430 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:36:11,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:36:11,431 INFO L82 PathProgramCache]: Analyzing trace with hash -535052766, now seen corresponding path program 3 times [2021-10-13 21:36:11,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:36:11,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129132716] [2021-10-13 21:36:11,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:36:11,432 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:36:11,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:36:11,433 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) [2021-10-13 21:36:11,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 21:36:11,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 21:36:11,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:36:11,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 21:36:11,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:36:11,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:36:11,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:36:12,065 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:36:12,065 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 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:36:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:12,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:36:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:20,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:36:20,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129132716] [2021-10-13 21:36:20,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129132716] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:36:20,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:36:20,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 21:36:20,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596949934] [2021-10-13 21:36:20,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 21:36:20,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:36:20,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 21:36:20,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-13 21:36:20,664 INFO L87 Difference]: Start difference. First operand 42 states and 80 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) [2021-10-13 21:36:35,951 WARN L207 SmtUtils]: Spent 11.78 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-13 21:36:45,083 WARN L207 SmtUtils]: Spent 8.12 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-13 21:36:51,782 WARN L207 SmtUtils]: Spent 5.61 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-13 21:36:58,352 WARN L207 SmtUtils]: Spent 5.51 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-13 21:37:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:24,880 INFO L93 Difference]: Finished difference Result 758 states and 1484 transitions. [2021-10-13 21:37:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 21:37:24,882 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 [2021-10-13 21:37:24,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:24,888 INFO L225 Difference]: With dead ends: 758 [2021-10-13 21:37:24,888 INFO L226 Difference]: Without dead ends: 758 [2021-10-13 21:37:24,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 62248.3ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 21:37:24,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-10-13 21:37:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 58. [2021-10-13 21:37:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 2.0) internal successors, (112), 57 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:37:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 112 transitions. [2021-10-13 21:37:24,898 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 112 transitions. Word has length 16 [2021-10-13 21:37:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:24,899 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 112 transitions. [2021-10-13 21:37:24,899 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) [2021-10-13 21:37:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 112 transitions. [2021-10-13 21:37:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 21:37:24,900 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:24,900 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:37:24,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:25,113 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 [2021-10-13 21:37:25,114 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:37:25,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:25,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1380605847, now seen corresponding path program 1 times [2021-10-13 21:37:25,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:25,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726687542] [2021-10-13 21:37:25,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:25,117 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:25,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:25,118 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) [2021-10-13 21:37:25,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 21:37:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:25,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:37:25,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:25,429 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 [2021-10-13 21:37:25,453 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 [2021-10-13 21:37:25,600 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-13 21:37:25,600 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 [2021-10-13 21:37:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:37:25,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:26,142 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-10-13 21:37:26,143 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 264 treesize of output 172 [2021-10-13 21:37:26,149 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 172 treesize of output 168 [2021-10-13 21:37:26,155 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 168 treesize of output 164 [2021-10-13 21:37:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:37:56,288 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:56,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726687542] [2021-10-13 21:37:56,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726687542] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:37:56,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:37:56,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:37:56,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303904053] [2021-10-13 21:37:56,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:37:56,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:56,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:37:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:37:56,290 INFO L87 Difference]: Start difference. First operand 58 states and 112 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 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) [2021-10-13 21:37:56,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:56,746 INFO L93 Difference]: Finished difference Result 71 states and 141 transitions. [2021-10-13 21:37:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 21:37:56,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 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 [2021-10-13 21:37:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:56,751 INFO L225 Difference]: With dead ends: 71 [2021-10-13 21:37:56,751 INFO L226 Difference]: Without dead ends: 62 [2021-10-13 21:37:56,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 628.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:37:56,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-13 21:37:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-13 21:37:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 2.033333333333333) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:37:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-10-13 21:37:56,755 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 16 [2021-10-13 21:37:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:56,756 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-10-13 21:37:56,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 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) [2021-10-13 21:37:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-10-13 21:37:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 21:37:56,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:56,757 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:37:56,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:56,966 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 [2021-10-13 21:37:56,967 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:37:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:56,968 INFO L82 PathProgramCache]: Analyzing trace with hash -917937563, now seen corresponding path program 2 times [2021-10-13 21:37:56,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:56,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848819960] [2021-10-13 21:37:56,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:37:56,970 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:56,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:56,971 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) [2021-10-13 21:37:56,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 21:37:57,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:37:57,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:37:57,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:37:57,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:57,418 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 75 treesize of output 73 [2021-10-13 21:37:57,430 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-13 21:37:57,431 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 65 treesize of output 30 [2021-10-13 21:37:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:57,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:57,845 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-13 21:37:57,845 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 329 treesize of output 189 [2021-10-13 21:37:57,852 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 189 treesize of output 185 [2021-10-13 21:37:57,859 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 185 treesize of output 181 [2021-10-13 21:37:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:58,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:58,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848819960] [2021-10-13 21:37:58,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848819960] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:37:58,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:37:58,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-10-13 21:37:58,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451153021] [2021-10-13 21:37:58,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 21:37:58,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:58,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 21:37:58,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:37:58,485 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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) [2021-10-13 21:37:59,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:59,091 INFO L93 Difference]: Finished difference Result 117 states and 225 transitions. [2021-10-13 21:37:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 21:37:59,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 17 [2021-10-13 21:37:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:59,093 INFO L225 Difference]: With dead ends: 117 [2021-10-13 21:37:59,093 INFO L226 Difference]: Without dead ends: 98 [2021-10-13 21:37:59,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 789.3ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:37:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-13 21:37:59,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2021-10-13 21:37:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 76 states have (on average 2.1447368421052633) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:37:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-10-13 21:37:59,097 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 17 [2021-10-13 21:37:59,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:59,097 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-10-13 21:37:59,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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) [2021-10-13 21:37:59,098 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-10-13 21:37:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 21:37:59,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:59,098 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:37:59,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:59,306 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 [2021-10-13 21:37:59,307 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-13 21:37:59,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:59,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1290376896, now seen corresponding path program 3 times [2021-10-13 21:37:59,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:59,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587313973] [2021-10-13 21:37:59,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:37:59,309 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:59,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:59,310 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) [2021-10-13 21:37:59,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 21:37:59,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:37:59,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:37:59,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 21:37:59,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:00,160 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 20 treesize of output 16 [2021-10-13 21:38:00,202 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 [2021-10-13 21:38:00,681 INFO L354 Elim1Store]: treesize reduction 497, result has 0.2 percent of original size [2021-10-13 21:38:00,682 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 204 treesize of output 62 [2021-10-13 21:38:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:38:00,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:06,799 INFO L354 Elim1Store]: treesize reduction 1907, result has 9.9 percent of original size [2021-10-13 21:38:06,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 690 treesize of output 546 [2021-10-13 21:38:06,813 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 546 treesize of output 538 [2021-10-13 21:38:06,825 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 538 treesize of output 530 Received shutdown request... [2021-10-13 21:49:19,959 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:49:19,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 21:49:19,980 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:49:20,002 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:49:20,160 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 [2021-10-13 21:49:20,161 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. [2021-10-13 21:49:20,164 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:49:20,168 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:49:20,168 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:49:20,174 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:49:20,174 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-13 21:49:20,174 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-13 21:49:20,175 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 21:49:20,175 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 21:49:20,175 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 21:49:20,175 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 21:49:20,175 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 21:49:20,175 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 21:49:20,176 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 21:49:20,176 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 21:49:20,176 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 21:49:20,176 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 21:49:20,176 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:49:20,177 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 21:49:20,177 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 21:49:20,181 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:49:20,181 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:49:20,182 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:49:20,182 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:49:20,182 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-13 21:49:20,182 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-13 21:49:20,191 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 21:49:20,191 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 21:49:20,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:49:20 BasicIcfg [2021-10-13 21:49:20,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 21:49:20,194 INFO L168 Benchmark]: Toolchain (without parser) took 840222.66 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 125.6 MB in the beginning and 151.5 MB in the end (delta: -25.9 MB). Peak memory consumption was 113.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:49:20,195 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 21:49:20,195 INFO L168 Benchmark]: CACSL2BoogieTranslator took 386.57 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 112.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-13 21:49:20,196 INFO L168 Benchmark]: Boogie Procedure Inliner took 72.73 ms. Allocated memory is still 151.0 MB. Free memory was 112.4 MB in the beginning and 110.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:49:20,196 INFO L168 Benchmark]: Boogie Preprocessor took 39.72 ms. Allocated memory is still 151.0 MB. Free memory was 110.5 MB in the beginning and 108.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:49:20,196 INFO L168 Benchmark]: RCFGBuilder took 1379.10 ms. Allocated memory is still 151.0 MB. Free memory was 108.8 MB in the beginning and 115.4 MB in the end (delta: -6.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:49:20,197 INFO L168 Benchmark]: TraceAbstraction took 838331.03 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 114.9 MB in the beginning and 151.5 MB in the end (delta: -36.7 MB). Peak memory consumption was 102.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:49:20,199 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 386.57 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 112.4 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 72.73 ms. Allocated memory is still 151.0 MB. Free memory was 112.4 MB in the beginning and 110.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.72 ms. Allocated memory is still 151.0 MB. Free memory was 110.5 MB in the beginning and 108.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1379.10 ms. Allocated memory is still 151.0 MB. Free memory was 108.8 MB in the beginning and 115.4 MB in the end (delta: -6.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 838331.03 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 114.9 MB in the beginning and 151.5 MB in the end (delta: -36.7 MB). Peak memory consumption was 102.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 19306.8ms, 132 PlacesBefore, 40 PlacesAfterwards, 136 TransitionsBefore, 36 TransitionsAfterwards, 1180 CoEnabledTransitionPairs, 7 FixpointIterations, 82 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 9 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 152 TotalNumberOfCompositions, 1528 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1484, positive: 1467, positive conditional: 0, positive unconditional: 1467, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 688, positive: 683, positive conditional: 0, positive unconditional: 683, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 688, positive: 681, positive conditional: 0, positive unconditional: 681, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 839, positive: 418, positive conditional: 0, positive unconditional: 418, negative: 421, negative conditional: 0, negative unconditional: 421, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1484, positive: 784, positive conditional: 0, positive unconditional: 784, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 688, unknown conditional: 0, unknown unconditional: 688] , Statistics on independence cache: Total cache size (in pairs): 50, Positive cache size: 49, Positive conditional cache size: 0, Positive unconditional cache size: 49, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 157 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 838108.6ms, OverallIterations: 18, TraceHistogramMax: 14, EmptinessCheckTime: 21.4ms, AutomataDifference: 76939.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19388.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 427 SDtfs, 4898 SDslu, 2486 SDs, 0 SdLazy, 2644 SolverSat, 103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14264.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 246 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 73665.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=167occurred in iteration=1, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 175.0ms AutomataMinimizationTime, 17 MinimizatonAttempts, 2142 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 157.8ms SsaConstructionTime, 933.7ms SatisfiabilityAnalysisTime, 55062.8ms InterpolantComputationTime, 124 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 214 ConstructedInterpolants, 35 QuantifiedInterpolants, 4853 SizeOfPredicates, 125 NumberOfNonLiveVariables, 1096 ConjunctsInSsa, 156 ConjunctsInUnsatCore, 34 InterpolantComputations, 22 PerfectInterpolantSequences, 26/296 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown