/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/array-eq-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 15:20:57,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 15:20:57,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 15:20:57,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-07 15:20:57,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-07 15:20:57,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-07 15:20:57,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-07 15:20:57,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-07 15:20:57,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-07 15:20:57,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-07 15:20:57,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-07 15:20:57,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-07 15:20:57,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 15:20:57,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 15:20:57,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 15:20:57,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 15:20:57,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 15:20:57,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 15:20:57,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 15:20:57,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 15:20:57,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 15:20:57,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 15:20:57,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 15:20:57,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 15:20:57,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-07 15:20:57,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-07 15:20:57,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-07 15:20:57,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-07 15:20:57,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-07 15:20:57,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-07 15:20:57,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-07 15:20:57,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-07 15:20:57,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-07 15:20:57,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-07 15:20:57,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-07 15:20:57,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-07 15:20:57,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-07 15:20:57,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-07 15:20:57,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 15:20:57,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 15:20:57,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 15:20:57,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 15:20:57,281 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 15:20:57,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 15:20:57,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 15:20:57,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 15:20:57,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 15:20:57,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 15:20:57,287 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 15:20:57,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 15:20:57,287 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 15:20:57,288 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 15:20:57,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 15:20:57,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 15:20:57,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 15:20:57,289 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 15:20:57,290 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 15:20:57,290 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 15:20:57,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 15:20:57,291 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 15:20:57,291 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 15:20:57,291 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 15:20:57,291 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 15:20:57,291 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 15:20:57,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 15:20:57,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 15:20:57,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 15:20:57,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:20:57,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 15:20:57,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 15:20:57,293 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 15:20:57,293 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 15:20:57,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 15:20:57,293 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 15:20:57,294 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 15:20:57,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 15:20:57,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 15:20:57,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 15:20:57,778 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 15:20:57,779 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 15:20:57,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2021-10-07 15:20:57,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af91bf6aa/a42f94c30c8a409085733a050b005d43/FLAG8c38ae781 [2021-10-07 15:20:58,467 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 15:20:58,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2021-10-07 15:20:58,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af91bf6aa/a42f94c30c8a409085733a050b005d43/FLAG8c38ae781 [2021-10-07 15:20:58,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af91bf6aa/a42f94c30c8a409085733a050b005d43 [2021-10-07 15:20:58,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 15:20:58,859 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 15:20:58,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 15:20:58,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 15:20:58,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 15:20:58,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:20:58" (1/1) ... [2021-10-07 15:20:58,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23862e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:58, skipping insertion in model container [2021-10-07 15:20:58,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:20:58" (1/1) ... [2021-10-07 15:20:58,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 15:20:58,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 15:20:59,094 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/array-eq-symm.wvr.c[2251,2264] [2021-10-07 15:20:59,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:20:59,121 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-07 15:20:59,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 15:20:59,140 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/array-eq-symm.wvr.c[2251,2264] [2021-10-07 15:20:59,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:20:59,151 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 15:20:59,180 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/array-eq-symm.wvr.c[2251,2264] [2021-10-07 15:20:59,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:20:59,219 INFO L208 MainTranslator]: Completed translation [2021-10-07 15:20:59,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59 WrapperNode [2021-10-07 15:20:59,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 15:20:59,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 15:20:59,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 15:20:59,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 15:20:59,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,260 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 15:20:59,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 15:20:59,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 15:20:59,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 15:20:59,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 15:20:59,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 15:20:59,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 15:20:59,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 15:20:59,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:20:59,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:20:59,453 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-07 15:20:59,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-07 15:20:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 15:20:59,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 15:20:59,532 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 15:20:59,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 15:20:59,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 15:20:59,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 15:20:59,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 15:20:59,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 15:20:59,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 15:20:59,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 15:20:59,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 15:20:59,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 15:20:59,536 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 15:21:00,315 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 15:21:00,316 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-07 15:21:00,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:21:00 BoogieIcfgContainer [2021-10-07 15:21:00,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 15:21:00,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 15:21:00,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 15:21:00,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 15:21:00,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:20:58" (1/3) ... [2021-10-07 15:21:00,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cbb0e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:21:00, skipping insertion in model container [2021-10-07 15:21:00,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (2/3) ... [2021-10-07 15:21:00,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cbb0e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:21:00, skipping insertion in model container [2021-10-07 15:21:00,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:21:00" (3/3) ... [2021-10-07 15:21:00,329 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2021-10-07 15:21:00,336 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 15:21:00,336 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2021-10-07 15:21:00,336 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 15:21:00,381 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,381 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,382 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,382 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,382 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,382 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,383 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,383 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,385 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,385 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,386 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,386 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,386 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,387 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,387 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,387 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,387 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,388 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,389 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,389 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,389 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,389 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,390 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,390 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,390 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,391 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,391 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,391 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,391 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,391 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,392 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,393 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,393 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,393 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,393 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,394 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,395 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,395 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,395 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,396 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,396 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,396 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,396 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,397 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,397 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,397 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,397 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,398 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,398 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,398 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,398 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,399 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,399 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,399 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,399 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,400 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,400 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,400 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,400 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,401 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,405 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,405 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,405 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,405 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,406 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,411 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,411 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,411 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,412 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,412 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,418 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-07 15:21:00,478 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 15:21:00,487 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-07 15:21:00,488 INFO L340 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2021-10-07 15:21:00,509 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 15:21:00,522 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 176 transitions, 368 flow [2021-10-07 15:21:00,526 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 176 transitions, 368 flow [2021-10-07 15:21:00,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 168 places, 176 transitions, 368 flow [2021-10-07 15:21:00,605 INFO L129 PetriNetUnfolder]: 15/174 cut-off events. [2021-10-07 15:21:00,605 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-07 15:21:00,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 174 events. 15/174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 231 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 125. Up to 3 conditions per place. [2021-10-07 15:21:00,617 INFO L116 LiptonReduction]: Number of co-enabled transitions 1720 [2021-10-07 15:21:26,683 INFO L131 LiptonReduction]: Checked pairs total: 2614 [2021-10-07 15:21:26,684 INFO L133 LiptonReduction]: Total number of compositions: 195 [2021-10-07 15:21:26,716 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 43 transitions, 102 flow [2021-10-07 15:21:26,743 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 233 states, 131 states have (on average 4.648854961832061) internal successors, (609), 232 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 131 states have (on average 4.648854961832061) internal successors, (609), 232 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:26,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 15:21:26,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:26,753 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 15:21:26,754 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:26,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash 21768, now seen corresponding path program 1 times [2021-10-07 15:21:26,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:26,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97875683] [2021-10-07 15:21:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:26,777 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:26,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:26,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:26,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 15:21:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:26,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:21:26,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:27,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:21:27,274 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:21:27,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2021-10-07 15:21:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:27,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:27,451 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:27,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97875683] [2021-10-07 15:21:27,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97875683] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:27,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:27,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:27,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452541389] [2021-10-07 15:21:27,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:27,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:27,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:27,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:27,475 INFO L87 Difference]: Start difference. First operand has 233 states, 131 states have (on average 4.648854961832061) internal successors, (609), 232 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:28,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:28,154 INFO L93 Difference]: Finished difference Result 465 states and 1221 transitions. [2021-10-07 15:21:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:21:28,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 15:21:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:28,179 INFO L225 Difference]: With dead ends: 465 [2021-10-07 15:21:28,180 INFO L226 Difference]: Without dead ends: 465 [2021-10-07 15:21:28,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:28,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-10-07 15:21:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 236. [2021-10-07 15:21:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 135 states have (on average 4.622222222222222) internal successors, (624), 235 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 624 transitions. [2021-10-07 15:21:28,253 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 624 transitions. Word has length 2 [2021-10-07 15:21:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:28,254 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 624 transitions. [2021-10-07 15:21:28,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 624 transitions. [2021-10-07 15:21:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 15:21:28,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:28,255 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 15:21:28,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:28,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:28,467 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:28,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:28,469 INFO L82 PathProgramCache]: Analyzing trace with hash 21769, now seen corresponding path program 1 times [2021-10-07 15:21:28,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:28,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809009935] [2021-10-07 15:21:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:28,475 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:28,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:28,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:28,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 15:21:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:28,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 15:21:28,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:28,709 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-07 15:21:28,710 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 [2021-10-07 15:21:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:29,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:29,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:29,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809009935] [2021-10-07 15:21:29,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809009935] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:29,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:29,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 15:21:29,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165589292] [2021-10-07 15:21:29,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:21:29,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:29,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:21:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:21:29,128 INFO L87 Difference]: Start difference. First operand 236 states and 624 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:29,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:29,317 INFO L93 Difference]: Finished difference Result 234 states and 618 transitions. [2021-10-07 15:21:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:29,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 15:21:29,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:29,321 INFO L225 Difference]: With dead ends: 234 [2021-10-07 15:21:29,321 INFO L226 Difference]: Without dead ends: 234 [2021-10-07 15:21:29,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:21:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-10-07 15:21:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-10-07 15:21:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 135 states have (on average 4.5777777777777775) internal successors, (618), 233 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:29,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 618 transitions. [2021-10-07 15:21:29,344 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 618 transitions. Word has length 2 [2021-10-07 15:21:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:29,344 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 618 transitions. [2021-10-07 15:21:29,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:29,344 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 618 transitions. [2021-10-07 15:21:29,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 15:21:29,345 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:29,345 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 15:21:29,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-07 15:21:29,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:29,559 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:29,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:29,561 INFO L82 PathProgramCache]: Analyzing trace with hash 679165, now seen corresponding path program 1 times [2021-10-07 15:21:29,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:29,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329150804] [2021-10-07 15:21:29,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:29,563 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:29,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:29,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:29,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 15:21:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:29,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:21:29,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:29,943 INFO L354 Elim1Store]: treesize reduction 151, result has 21.8 percent of original size [2021-10-07 15:21:29,943 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 44 treesize of output 72 [2021-10-07 15:21:29,956 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 111 treesize of output 109 [2021-10-07 15:21:31,381 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-10-07 15:21:31,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 39 [2021-10-07 15:21:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:32,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:33,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:33,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329150804] [2021-10-07 15:21:33,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329150804] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:33,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:33,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-07 15:21:33,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265789717] [2021-10-07 15:21:33,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:21:33,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:33,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:21:33,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:21:33,109 INFO L87 Difference]: Start difference. First operand 234 states and 618 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:33,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:33,640 INFO L93 Difference]: Finished difference Result 191 states and 483 transitions. [2021-10-07 15:21:33,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:33,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 15:21:33,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:33,643 INFO L225 Difference]: With dead ends: 191 [2021-10-07 15:21:33,644 INFO L226 Difference]: Without dead ends: 191 [2021-10-07 15:21:33,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1544.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:21:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-07 15:21:33,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-10-07 15:21:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 118 states have (on average 4.093220338983051) internal successors, (483), 190 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 483 transitions. [2021-10-07 15:21:33,660 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 483 transitions. Word has length 3 [2021-10-07 15:21:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:33,660 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 483 transitions. [2021-10-07 15:21:33,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:33,661 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 483 transitions. [2021-10-07 15:21:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 15:21:33,661 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:33,661 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 15:21:33,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:33,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:33,878 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:33,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:33,879 INFO L82 PathProgramCache]: Analyzing trace with hash 679166, now seen corresponding path program 1 times [2021-10-07 15:21:33,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:33,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610547092] [2021-10-07 15:21:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:33,881 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:33,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:33,882 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:33,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 15:21:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:33,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:21:33,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:34,159 INFO L354 Elim1Store]: treesize reduction 235, result has 17.8 percent of original size [2021-10-07 15:21:34,160 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 150 treesize of output 182 [2021-10-07 15:21:36,042 INFO L354 Elim1Store]: treesize reduction 138, result has 41.3 percent of original size [2021-10-07 15:21:36,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 88 treesize of output 171 [2021-10-07 15:21:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:51,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:51,587 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:51,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610547092] [2021-10-07 15:21:51,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610547092] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:51,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:51,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:51,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051361286] [2021-10-07 15:21:51,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:51,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:51,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:51,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:51,590 INFO L87 Difference]: Start difference. First operand 191 states and 483 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:51,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:51,811 INFO L93 Difference]: Finished difference Result 148 states and 348 transitions. [2021-10-07 15:21:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:51,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 15:21:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:51,815 INFO L225 Difference]: With dead ends: 148 [2021-10-07 15:21:51,815 INFO L226 Difference]: Without dead ends: 148 [2021-10-07 15:21:51,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2347.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:51,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-07 15:21:51,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-10-07 15:21:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 101 states have (on average 3.4455445544554455) internal successors, (348), 147 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:51,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 348 transitions. [2021-10-07 15:21:51,827 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 348 transitions. Word has length 3 [2021-10-07 15:21:51,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:51,827 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 348 transitions. [2021-10-07 15:21:51,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:51,828 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 348 transitions. [2021-10-07 15:21:51,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 15:21:51,828 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:51,828 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 15:21:51,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:52,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:52,043 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:52,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:52,044 INFO L82 PathProgramCache]: Analyzing trace with hash 21030344, now seen corresponding path program 1 times [2021-10-07 15:21:52,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:52,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195501059] [2021-10-07 15:21:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:52,046 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:52,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:52,047 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:52,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 15:21:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:52,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:21:52,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:52,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:21:52,312 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:21:52,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2021-10-07 15:21:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:52,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:52,892 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:52,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195501059] [2021-10-07 15:21:52,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195501059] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:52,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:52,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 15:21:52,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579342952] [2021-10-07 15:21:52,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:21:52,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:21:52,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:21:52,894 INFO L87 Difference]: Start difference. First operand 148 states and 348 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:58,746 INFO L93 Difference]: Finished difference Result 851 states and 2029 transitions. [2021-10-07 15:21:58,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 15:21:58,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 15:21:58,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:58,756 INFO L225 Difference]: With dead ends: 851 [2021-10-07 15:21:58,756 INFO L226 Difference]: Without dead ends: 851 [2021-10-07 15:21:58,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 711.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:21:58,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2021-10-07 15:21:58,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 156. [2021-10-07 15:21:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 109 states have (on average 3.3394495412844036) internal successors, (364), 155 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:58,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 364 transitions. [2021-10-07 15:21:58,772 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 364 transitions. Word has length 4 [2021-10-07 15:21:58,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:58,772 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 364 transitions. [2021-10-07 15:21:58,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:58,773 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 364 transitions. [2021-10-07 15:21:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 15:21:58,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:58,773 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 15:21:58,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:58,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:58,986 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:58,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:58,987 INFO L82 PathProgramCache]: Analyzing trace with hash 652691274, now seen corresponding path program 1 times [2021-10-07 15:21:58,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:58,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61971368] [2021-10-07 15:21:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:58,989 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:58,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:58,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:58,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 15:21:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:59,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:21:59,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:59,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-07 15:21:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:59,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:59,567 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:59,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61971368] [2021-10-07 15:21:59,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61971368] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:59,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:59,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 15:21:59,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23261075] [2021-10-07 15:21:59,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:21:59,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:59,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:21:59,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:21:59,570 INFO L87 Difference]: Start difference. First operand 156 states and 364 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:01,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:01,202 INFO L93 Difference]: Finished difference Result 442 states and 1024 transitions. [2021-10-07 15:22:01,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:22:01,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 15:22:01,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:01,207 INFO L225 Difference]: With dead ends: 442 [2021-10-07 15:22:01,207 INFO L226 Difference]: Without dead ends: 442 [2021-10-07 15:22:01,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 416.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:01,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-10-07 15:22:01,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 204. [2021-10-07 15:22:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 157 states have (on average 3.961783439490446) internal successors, (622), 203 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:01,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 622 transitions. [2021-10-07 15:22:01,220 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 622 transitions. Word has length 5 [2021-10-07 15:22:01,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:01,221 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 622 transitions. [2021-10-07 15:22:01,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:01,221 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 622 transitions. [2021-10-07 15:22:01,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 15:22:01,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:01,222 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 15:22:01,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:01,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:01,440 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:01,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:01,441 INFO L82 PathProgramCache]: Analyzing trace with hash 652691275, now seen corresponding path program 1 times [2021-10-07 15:22:01,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:01,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748206297] [2021-10-07 15:22:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:22:01,443 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:01,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:01,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:01,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 15:22:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:22:01,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:22:01,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:01,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-07 15:22:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:01,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:01,552 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:01,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748206297] [2021-10-07 15:22:01,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748206297] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:22:01,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:22:01,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-07 15:22:01,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142762089] [2021-10-07 15:22:01,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:22:01,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:01,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:22:01,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:22:01,554 INFO L87 Difference]: Start difference. First operand 204 states and 622 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:01,731 INFO L93 Difference]: Finished difference Result 166 states and 483 transitions. [2021-10-07 15:22:01,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:22:01,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 15:22:01,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:01,734 INFO L225 Difference]: With dead ends: 166 [2021-10-07 15:22:01,734 INFO L226 Difference]: Without dead ends: 166 [2021-10-07 15:22:01,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 15:22:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-07 15:22:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-10-07 15:22:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 132 states have (on average 3.659090909090909) internal successors, (483), 165 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 483 transitions. [2021-10-07 15:22:01,742 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 483 transitions. Word has length 5 [2021-10-07 15:22:01,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:01,743 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 483 transitions. [2021-10-07 15:22:01,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 483 transitions. [2021-10-07 15:22:01,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 15:22:01,744 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:01,744 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 15:22:01,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:01,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:01,956 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:01,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:01,956 INFO L82 PathProgramCache]: Analyzing trace with hash 652691216, now seen corresponding path program 1 times [2021-10-07 15:22:01,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:01,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13607905] [2021-10-07 15:22:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:22:01,958 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:01,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:01,959 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:01,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 15:22:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:22:02,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:22:02,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:02,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:02,141 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:02,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13607905] [2021-10-07 15:22:02,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13607905] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:22:02,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:22:02,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-07 15:22:02,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739159398] [2021-10-07 15:22:02,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:22:02,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:02,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:22:02,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:22:02,143 INFO L87 Difference]: Start difference. First operand 166 states and 483 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:02,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:02,476 INFO L93 Difference]: Finished difference Result 225 states and 593 transitions. [2021-10-07 15:22:02,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:22:02,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 15:22:02,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:02,479 INFO L225 Difference]: With dead ends: 225 [2021-10-07 15:22:02,480 INFO L226 Difference]: Without dead ends: 225 [2021-10-07 15:22:02,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:22:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-10-07 15:22:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 188. [2021-10-07 15:22:02,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 154 states have (on average 3.4545454545454546) internal successors, (532), 187 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 532 transitions. [2021-10-07 15:22:02,489 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 532 transitions. Word has length 5 [2021-10-07 15:22:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:02,489 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 532 transitions. [2021-10-07 15:22:02,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 532 transitions. [2021-10-07 15:22:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 15:22:02,490 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:02,490 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 15:22:02,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:02,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:02,696 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:02,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:02,697 INFO L82 PathProgramCache]: Analyzing trace with hash 652691314, now seen corresponding path program 1 times [2021-10-07 15:22:02,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:02,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966972097] [2021-10-07 15:22:02,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:22:02,698 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:02,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:02,699 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:02,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 15:22:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:22:02,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:22:02,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:02,928 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-07 15:22:02,928 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 5 case distinctions, treesize of input 93 treesize of output 128 [2021-10-07 15:22:05,136 INFO L354 Elim1Store]: treesize reduction 127, result has 46.0 percent of original size [2021-10-07 15:22:05,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 183 [2021-10-07 15:22:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:24,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:24,560 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:24,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966972097] [2021-10-07 15:22:24,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966972097] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:22:24,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:22:24,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:22:24,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564964583] [2021-10-07 15:22:24,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:22:24,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:24,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:22:24,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:22:24,562 INFO L87 Difference]: Start difference. First operand 188 states and 532 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:24,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:24,748 INFO L93 Difference]: Finished difference Result 173 states and 494 transitions. [2021-10-07 15:22:24,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:22:24,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 15:22:24,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:24,752 INFO L225 Difference]: With dead ends: 173 [2021-10-07 15:22:24,752 INFO L226 Difference]: Without dead ends: 173 [2021-10-07 15:22:24,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:22:24,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-07 15:22:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-10-07 15:22:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 147 states have (on average 3.360544217687075) internal successors, (494), 172 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 494 transitions. [2021-10-07 15:22:24,759 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 494 transitions. Word has length 5 [2021-10-07 15:22:24,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:24,760 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 494 transitions. [2021-10-07 15:22:24,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 494 transitions. [2021-10-07 15:22:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 15:22:24,761 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:24,761 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 15:22:24,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:24,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:24,973 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:24,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:24,974 INFO L82 PathProgramCache]: Analyzing trace with hash 652691315, now seen corresponding path program 1 times [2021-10-07 15:22:24,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:24,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188318076] [2021-10-07 15:22:24,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:22:24,976 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:24,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:24,977 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:24,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-07 15:22:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:22:25,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:25,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:25,213 INFO L354 Elim1Store]: treesize reduction 155, result has 19.7 percent of original size [2021-10-07 15:22:25,214 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 44 treesize of output 68 [2021-10-07 15:22:25,220 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 95 treesize of output 93 [2021-10-07 15:22:25,571 INFO L354 Elim1Store]: treesize reduction 64, result has 27.3 percent of original size [2021-10-07 15:22:25,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2021-10-07 15:22:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:28,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:28,965 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:28,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188318076] [2021-10-07 15:22:28,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188318076] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:22:28,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:22:28,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-07 15:22:28,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737920211] [2021-10-07 15:22:28,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:22:28,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:28,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:22:28,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:22:28,967 INFO L87 Difference]: Start difference. First operand 173 states and 494 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:29,985 INFO L93 Difference]: Finished difference Result 158 states and 456 transitions. [2021-10-07 15:22:29,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:22:29,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 15:22:29,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:29,989 INFO L225 Difference]: With dead ends: 158 [2021-10-07 15:22:29,989 INFO L226 Difference]: Without dead ends: 158 [2021-10-07 15:22:29,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:22:29,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-07 15:22:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-10-07 15:22:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 140 states have (on average 3.257142857142857) internal successors, (456), 157 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:29,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 456 transitions. [2021-10-07 15:22:29,996 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 456 transitions. Word has length 5 [2021-10-07 15:22:29,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:29,996 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 456 transitions. [2021-10-07 15:22:29,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 456 transitions. [2021-10-07 15:22:29,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 15:22:29,997 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:29,997 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 15:22:30,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-07 15:22:30,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:30,198 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:30,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:30,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1263817526, now seen corresponding path program 1 times [2021-10-07 15:22:30,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:30,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717164233] [2021-10-07 15:22:30,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:22:30,201 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:30,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:30,202 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:30,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-07 15:22:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:22:30,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:22:30,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:22:30,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:22:30,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:30,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717164233] [2021-10-07 15:22:30,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717164233] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:22:30,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:22:30,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 15:22:30,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406905844] [2021-10-07 15:22:30,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:22:30,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:22:30,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:30,446 INFO L87 Difference]: Start difference. First operand 158 states and 456 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:30,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:30,884 INFO L93 Difference]: Finished difference Result 316 states and 742 transitions. [2021-10-07 15:22:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:22:30,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 15:22:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:30,887 INFO L225 Difference]: With dead ends: 316 [2021-10-07 15:22:30,887 INFO L226 Difference]: Without dead ends: 316 [2021-10-07 15:22:30,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-10-07 15:22:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 158. [2021-10-07 15:22:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 140 states have (on average 3.257142857142857) internal successors, (456), 157 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 456 transitions. [2021-10-07 15:22:30,896 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 456 transitions. Word has length 6 [2021-10-07 15:22:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:30,896 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 456 transitions. [2021-10-07 15:22:30,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 456 transitions. [2021-10-07 15:22:30,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 15:22:30,897 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:30,897 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:30,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:31,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:31,109 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:31,110 INFO L82 PathProgramCache]: Analyzing trace with hash -523911671, now seen corresponding path program 1 times [2021-10-07 15:22:31,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:31,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084899394] [2021-10-07 15:22:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:22:31,112 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:31,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:31,113 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:31,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-07 15:22:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:22:31,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:22:31,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:31,389 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-07 15:22:31,389 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 [2021-10-07 15:22:31,735 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-07 15:22:31,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-10-07 15:22:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 15:22:31,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 15:22:35,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:35,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084899394] [2021-10-07 15:22:35,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084899394] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:22:35,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:22:35,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 5 [2021-10-07 15:22:35,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368622253] [2021-10-07 15:22:35,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-07 15:22:35,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:35,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-07 15:22:35,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=23, Unknown=2, NotChecked=0, Total=42 [2021-10-07 15:22:35,895 INFO L87 Difference]: Start difference. First operand 158 states and 456 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:36,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:36,065 INFO L93 Difference]: Finished difference Result 126 states and 342 transitions. [2021-10-07 15:22:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:22:36,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 15:22:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:36,069 INFO L225 Difference]: With dead ends: 126 [2021-10-07 15:22:36,069 INFO L226 Difference]: Without dead ends: 126 [2021-10-07 15:22:36,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4089.3ms TimeCoverageRelationStatistics Valid=17, Invalid=23, Unknown=2, NotChecked=0, Total=42 [2021-10-07 15:22:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-07 15:22:36,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-10-07 15:22:36,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 115 states have (on average 2.973913043478261) internal successors, (342), 125 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 342 transitions. [2021-10-07 15:22:36,075 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 342 transitions. Word has length 7 [2021-10-07 15:22:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:36,076 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 342 transitions. [2021-10-07 15:22:36,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 342 transitions. [2021-10-07 15:22:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 15:22:36,077 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:36,077 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:36,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:36,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:36,290 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:36,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:36,290 INFO L82 PathProgramCache]: Analyzing trace with hash -523911670, now seen corresponding path program 1 times [2021-10-07 15:22:36,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:36,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671779690] [2021-10-07 15:22:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:22:36,292 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:36,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:36,293 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:36,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-07 15:22:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:22:36,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 15:22:36,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:36,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:22:36,628 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:22:36,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 80 [2021-10-07 15:22:36,803 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-07 15:22:36,804 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 80 treesize of output 117 [2021-10-07 15:22:48,821 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-10-07 15:22:48,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 192 treesize of output 174 [2021-10-07 15:22:48,890 INFO L354 Elim1Store]: treesize reduction 7, result has 85.7 percent of original size [2021-10-07 15:22:48,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 192 treesize of output 221 [2021-10-07 15:22:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:22:51,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:22:52,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:52,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671779690] [2021-10-07 15:22:52,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671779690] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:52,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:52,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 7 [2021-10-07 15:22:52,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147192627] [2021-10-07 15:22:52,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 15:22:52,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:52,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 15:22:52,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-07 15:22:52,526 INFO L87 Difference]: Start difference. First operand 126 states and 342 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:06,172 INFO L93 Difference]: Finished difference Result 439 states and 1037 transitions. [2021-10-07 15:23:06,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:23:06,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 15:23:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:06,177 INFO L225 Difference]: With dead ends: 439 [2021-10-07 15:23:06,178 INFO L226 Difference]: Without dead ends: 439 [2021-10-07 15:23:06,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 6882.9ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:23:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-10-07 15:23:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 144. [2021-10-07 15:23:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 133 states have (on average 2.9473684210526314) internal successors, (392), 143 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 392 transitions. [2021-10-07 15:23:06,187 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 392 transitions. Word has length 7 [2021-10-07 15:23:06,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:06,188 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 392 transitions. [2021-10-07 15:23:06,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:06,188 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 392 transitions. [2021-10-07 15:23:06,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 15:23:06,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:06,189 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:23:06,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-07 15:23:06,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:23:06,402 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:23:06,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:06,403 INFO L82 PathProgramCache]: Analyzing trace with hash 171144190, now seen corresponding path program 1 times [2021-10-07 15:23:06,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:06,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903328740] [2021-10-07 15:23:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:23:06,404 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:06,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:06,407 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:23:06,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-07 15:23:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:23:06,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:23:06,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:06,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:06,686 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:06,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903328740] [2021-10-07 15:23:06,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903328740] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:23:06,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:23:06,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-07 15:23:06,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561708445] [2021-10-07 15:23:06,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:23:06,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:06,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:23:06,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:23:06,688 INFO L87 Difference]: Start difference. First operand 144 states and 392 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:06,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:06,965 INFO L93 Difference]: Finished difference Result 164 states and 419 transitions. [2021-10-07 15:23:06,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:23:06,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 15:23:06,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:06,967 INFO L225 Difference]: With dead ends: 164 [2021-10-07 15:23:06,967 INFO L226 Difference]: Without dead ends: 164 [2021-10-07 15:23:06,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:23:06,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-07 15:23:06,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2021-10-07 15:23:06,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 144 states have (on average 2.8541666666666665) internal successors, (411), 154 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 411 transitions. [2021-10-07 15:23:06,973 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 411 transitions. Word has length 7 [2021-10-07 15:23:06,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:06,974 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 411 transitions. [2021-10-07 15:23:06,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:06,974 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 411 transitions. [2021-10-07 15:23:06,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 15:23:06,975 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:06,975 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-07 15:23:06,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-07 15:23:07,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:23:07,186 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:23:07,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:07,186 INFO L82 PathProgramCache]: Analyzing trace with hash 229275464, now seen corresponding path program 2 times [2021-10-07 15:23:07,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:07,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121618913] [2021-10-07 15:23:07,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:23:07,188 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:07,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:07,189 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:23:07,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-07 15:23:07,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:23:07,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:23:07,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 15:23:07,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:07,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:23:07,539 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:23:07,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2021-10-07 15:23:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:07,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:09,906 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:09,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121618913] [2021-10-07 15:23:09,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121618913] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:09,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:09,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 15:23:09,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176155252] [2021-10-07 15:23:09,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:23:09,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:09,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:23:09,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:23:09,908 INFO L87 Difference]: Start difference. First operand 155 states and 411 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:34,364 INFO L93 Difference]: Finished difference Result 1247 states and 3466 transitions. [2021-10-07 15:23:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-07 15:23:34,368 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 15:23:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:34,378 INFO L225 Difference]: With dead ends: 1247 [2021-10-07 15:23:34,379 INFO L226 Difference]: Without dead ends: 1247 [2021-10-07 15:23:34,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 7112.3ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:23:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-10-07 15:23:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 178. [2021-10-07 15:23:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 167 states have (on average 2.754491017964072) internal successors, (460), 177 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 460 transitions. [2021-10-07 15:23:34,398 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 460 transitions. Word has length 8 [2021-10-07 15:23:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:34,398 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 460 transitions. [2021-10-07 15:23:34,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 460 transitions. [2021-10-07 15:23:34,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 15:23:34,399 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:34,399 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:23:34,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-07 15:23:34,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:23:34,613 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:23:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:34,614 INFO L82 PathProgramCache]: Analyzing trace with hash 947213112, now seen corresponding path program 1 times [2021-10-07 15:23:34,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:34,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472155371] [2021-10-07 15:23:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:23:34,615 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:34,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:34,616 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:23:34,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-07 15:23:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:23:34,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:23:34,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:23:34,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:23:35,015 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:35,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472155371] [2021-10-07 15:23:35,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472155371] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:23:35,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:23:35,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 15:23:35,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75145172] [2021-10-07 15:23:35,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:23:35,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:35,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:23:35,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:23:35,018 INFO L87 Difference]: Start difference. First operand 178 states and 460 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:35,327 INFO L93 Difference]: Finished difference Result 281 states and 738 transitions. [2021-10-07 15:23:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:23:35,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 15:23:35,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:35,331 INFO L225 Difference]: With dead ends: 281 [2021-10-07 15:23:35,331 INFO L226 Difference]: Without dead ends: 281 [2021-10-07 15:23:35,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:23:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-10-07 15:23:35,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 169. [2021-10-07 15:23:35,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 158 states have (on average 2.7721518987341773) internal successors, (438), 168 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 438 transitions. [2021-10-07 15:23:35,339 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 438 transitions. Word has length 8 [2021-10-07 15:23:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:35,339 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 438 transitions. [2021-10-07 15:23:35,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 438 transitions. [2021-10-07 15:23:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 15:23:35,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:35,340 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:23:35,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-07 15:23:35,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:23:35,553 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:23:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:35,554 INFO L82 PathProgramCache]: Analyzing trace with hash -967865648, now seen corresponding path program 1 times [2021-10-07 15:23:35,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:35,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448022206] [2021-10-07 15:23:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:23:35,555 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:35,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:35,557 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:23:35,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-07 15:23:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:23:35,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 15:23:35,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:23:35,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:23:36,051 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:36,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448022206] [2021-10-07 15:23:36,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448022206] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:36,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:36,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 15:23:36,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96575459] [2021-10-07 15:23:36,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:23:36,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:36,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:23:36,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:23:36,053 INFO L87 Difference]: Start difference. First operand 169 states and 438 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:36,849 INFO L93 Difference]: Finished difference Result 316 states and 716 transitions. [2021-10-07 15:23:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:23:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 15:23:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:36,852 INFO L225 Difference]: With dead ends: 316 [2021-10-07 15:23:36,852 INFO L226 Difference]: Without dead ends: 316 [2021-10-07 15:23:36,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:23:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-10-07 15:23:36,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 210. [2021-10-07 15:23:36,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 199 states have (on average 2.7839195979899496) internal successors, (554), 209 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 554 transitions. [2021-10-07 15:23:36,862 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 554 transitions. Word has length 9 [2021-10-07 15:23:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:36,862 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 554 transitions. [2021-10-07 15:23:36,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 554 transitions. [2021-10-07 15:23:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 15:23:36,863 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:36,863 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:23:36,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-07 15:23:37,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:23:37,077 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:23:37,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:37,078 INFO L82 PathProgramCache]: Analyzing trace with hash -967831369, now seen corresponding path program 1 times [2021-10-07 15:23:37,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:37,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031528607] [2021-10-07 15:23:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:23:37,079 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:37,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:37,081 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:23:37,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-07 15:23:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:23:37,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 15:23:37,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:37,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:23:37,665 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:23:37,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 80 [2021-10-07 15:23:37,857 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-07 15:23:37,858 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 80 treesize of output 117 [2021-10-07 15:23:50,194 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-10-07 15:23:50,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 183 [2021-10-07 15:23:50,266 INFO L354 Elim1Store]: treesize reduction 7, result has 85.7 percent of original size [2021-10-07 15:23:50,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 201 treesize of output 230 [2021-10-07 15:23:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:23:53,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:23:54,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:54,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031528607] [2021-10-07 15:23:54,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031528607] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:54,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:54,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 7 [2021-10-07 15:23:54,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694717731] [2021-10-07 15:23:54,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 15:23:54,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:54,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 15:23:54,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-07 15:23:54,213 INFO L87 Difference]: Start difference. First operand 210 states and 554 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:00,755 INFO L93 Difference]: Finished difference Result 547 states and 1412 transitions. [2021-10-07 15:24:00,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:24:00,756 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 15:24:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:00,759 INFO L225 Difference]: With dead ends: 547 [2021-10-07 15:24:00,760 INFO L226 Difference]: Without dead ends: 547 [2021-10-07 15:24:00,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 4674.0ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:24:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-10-07 15:24:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 248. [2021-10-07 15:24:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 237 states have (on average 3.0) internal successors, (711), 247 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:00,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 711 transitions. [2021-10-07 15:24:00,771 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 711 transitions. Word has length 9 [2021-10-07 15:24:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:00,771 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 711 transitions. [2021-10-07 15:24:00,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:00,772 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 711 transitions. [2021-10-07 15:24:00,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 15:24:00,772 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:00,772 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:24:00,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-07 15:24:00,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:00,986 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:24:00,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:00,987 INFO L82 PathProgramCache]: Analyzing trace with hash -967831464, now seen corresponding path program 1 times [2021-10-07 15:24:00,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:00,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307798872] [2021-10-07 15:24:00,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:24:00,988 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:00,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:00,989 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:00,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-07 15:24:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:24:01,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:24:01,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:24:01,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:01,566 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 35 treesize of output 31 [2021-10-07 15:24:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:24:01,790 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:01,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307798872] [2021-10-07 15:24:01,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307798872] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:01,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:01,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 15:24:01,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094672937] [2021-10-07 15:24:01,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:24:01,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:01,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:24:01,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:24:01,792 INFO L87 Difference]: Start difference. First operand 248 states and 711 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:02,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:02,798 INFO L93 Difference]: Finished difference Result 471 states and 1311 transitions. [2021-10-07 15:24:02,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 15:24:02,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 15:24:02,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:02,803 INFO L225 Difference]: With dead ends: 471 [2021-10-07 15:24:02,803 INFO L226 Difference]: Without dead ends: 471 [2021-10-07 15:24:02,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:24:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-10-07 15:24:02,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 266. [2021-10-07 15:24:02,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 255 states have (on average 3.0549019607843135) internal successors, (779), 265 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:02,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 779 transitions. [2021-10-07 15:24:02,814 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 779 transitions. Word has length 9 [2021-10-07 15:24:02,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:02,814 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 779 transitions. [2021-10-07 15:24:02,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:02,814 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 779 transitions. [2021-10-07 15:24:02,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 15:24:02,815 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:02,815 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-10-07 15:24:02,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-07 15:24:03,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:03,028 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:24:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:03,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1313381892, now seen corresponding path program 2 times [2021-10-07 15:24:03,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:03,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720963952] [2021-10-07 15:24:03,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:24:03,029 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:03,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:03,031 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:03,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-07 15:24:03,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 15:24:03,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:03,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 15:24:03,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:03,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:24:03,411 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:24:03,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 80 [2021-10-07 15:24:03,621 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-07 15:24:03,621 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 80 treesize of output 117 [2021-10-07 15:24:21,063 INFO L354 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2021-10-07 15:24:21,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 352 treesize of output 390 [2021-10-07 15:24:21,157 INFO L354 Elim1Store]: treesize reduction 108, result has 18.8 percent of original size [2021-10-07 15:24:21,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 390 treesize of output 351 [2021-10-07 15:24:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-07 15:24:37,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-07 15:24:38,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:38,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720963952] [2021-10-07 15:24:38,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720963952] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:24:38,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:24:38,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 5 [2021-10-07 15:24:38,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457938073] [2021-10-07 15:24:38,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-07 15:24:38,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:38,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-07 15:24:38,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:24:38,588 INFO L87 Difference]: Start difference. First operand 266 states and 779 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:39,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:39,249 INFO L93 Difference]: Finished difference Result 328 states and 874 transitions. [2021-10-07 15:24:39,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:24:39,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 15:24:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:39,253 INFO L225 Difference]: With dead ends: 328 [2021-10-07 15:24:39,253 INFO L226 Difference]: Without dead ends: 328 [2021-10-07 15:24:39,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2334.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:24:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-10-07 15:24:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 258. [2021-10-07 15:24:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 247 states have (on average 2.9271255060728745) internal successors, (723), 257 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 723 transitions. [2021-10-07 15:24:39,262 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 723 transitions. Word has length 10 [2021-10-07 15:24:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:39,262 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 723 transitions. [2021-10-07 15:24:39,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 723 transitions. [2021-10-07 15:24:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 15:24:39,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:39,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:24:39,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-07 15:24:39,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:39,476 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:24:39,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:39,477 INFO L82 PathProgramCache]: Analyzing trace with hash 62001366, now seen corresponding path program 1 times [2021-10-07 15:24:39,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:39,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273634271] [2021-10-07 15:24:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:24:39,478 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:39,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:39,480 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:39,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-07 15:24:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:24:39,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 15:24:39,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:24:39,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:24:40,090 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:40,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273634271] [2021-10-07 15:24:40,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273634271] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:40,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:40,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 15:24:40,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732893378] [2021-10-07 15:24:40,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:24:40,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:40,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:24:40,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:24:40,092 INFO L87 Difference]: Start difference. First operand 258 states and 723 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:40,906 INFO L93 Difference]: Finished difference Result 346 states and 841 transitions. [2021-10-07 15:24:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:24:40,907 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 15:24:40,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:40,911 INFO L225 Difference]: With dead ends: 346 [2021-10-07 15:24:40,911 INFO L226 Difference]: Without dead ends: 346 [2021-10-07 15:24:40,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:24:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-10-07 15:24:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 250. [2021-10-07 15:24:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 239 states have (on average 2.8744769874476988) internal successors, (687), 249 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:40,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 687 transitions. [2021-10-07 15:24:40,920 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 687 transitions. Word has length 10 [2021-10-07 15:24:40,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:40,924 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 687 transitions. [2021-10-07 15:24:40,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:40,924 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 687 transitions. [2021-10-07 15:24:40,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 15:24:40,925 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:40,925 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:24:40,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-07 15:24:41,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:41,140 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:24:41,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:41,140 INFO L82 PathProgramCache]: Analyzing trace with hash 122302300, now seen corresponding path program 2 times [2021-10-07 15:24:41,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:41,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715453429] [2021-10-07 15:24:41,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:24:41,142 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:41,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:41,143 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:41,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-07 15:24:41,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:24:41,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:41,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:24:41,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:41,650 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:24:41,651 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 42 treesize of output 80 [2021-10-07 15:24:41,833 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-07 15:24:41,833 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 80 treesize of output 117 [2021-10-07 15:24:52,762 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-10-07 15:24:52,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 171 [2021-10-07 15:24:52,843 INFO L354 Elim1Store]: treesize reduction 7, result has 85.7 percent of original size [2021-10-07 15:24:52,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 191 treesize of output 220 [2021-10-07 15:24:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:24:58,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:24:59,667 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:59,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715453429] [2021-10-07 15:24:59,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715453429] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:59,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:59,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2021-10-07 15:24:59,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682798277] [2021-10-07 15:24:59,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 15:24:59,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:59,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 15:24:59,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:24:59,669 INFO L87 Difference]: Start difference. First operand 250 states and 687 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:22,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:25:22,925 INFO L93 Difference]: Finished difference Result 587 states and 1525 transitions. [2021-10-07 15:25:22,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:25:22,926 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 15:25:22,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:25:22,929 INFO L225 Difference]: With dead ends: 587 [2021-10-07 15:25:22,929 INFO L226 Difference]: Without dead ends: 587 [2021-10-07 15:25:22,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 8180.2ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:25:22,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-10-07 15:25:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 221. [2021-10-07 15:25:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 210 states have (on average 2.9523809523809526) internal successors, (620), 220 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 620 transitions. [2021-10-07 15:25:22,946 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 620 transitions. Word has length 11 [2021-10-07 15:25:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:25:22,946 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 620 transitions. [2021-10-07 15:25:22,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:22,947 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 620 transitions. [2021-10-07 15:25:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 15:25:22,947 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:25:22,948 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:25:22,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-07 15:25:23,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:25:23,161 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:25:23,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:25:23,163 INFO L82 PathProgramCache]: Analyzing trace with hash 122302205, now seen corresponding path program 1 times [2021-10-07 15:25:23,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:25:23,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408788035] [2021-10-07 15:25:23,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:25:23,164 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:25:23,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:25:23,165 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:25:23,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-07 15:25:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:25:23,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 15:25:23,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:25:23,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-07 15:25:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-07 15:25:23,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:25:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-07 15:25:24,721 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:25:24,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408788035] [2021-10-07 15:25:24,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408788035] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:25:24,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:25:24,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 15:25:24,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436578348] [2021-10-07 15:25:24,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:25:24,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:25:24,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:25:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:25:24,724 INFO L87 Difference]: Start difference. First operand 221 states and 620 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:26,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:25:26,762 INFO L93 Difference]: Finished difference Result 367 states and 981 transitions. [2021-10-07 15:25:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:25:26,764 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 15:25:26,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:25:26,766 INFO L225 Difference]: With dead ends: 367 [2021-10-07 15:25:26,767 INFO L226 Difference]: Without dead ends: 367 [2021-10-07 15:25:26,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 990.3ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:25:26,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-10-07 15:25:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 257. [2021-10-07 15:25:26,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 246 states have (on average 3.16260162601626) internal successors, (778), 256 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 778 transitions. [2021-10-07 15:25:26,778 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 778 transitions. Word has length 11 [2021-10-07 15:25:26,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:25:26,779 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 778 transitions. [2021-10-07 15:25:26,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 778 transitions. [2021-10-07 15:25:26,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 15:25:26,780 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:25:26,780 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-07 15:25:26,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-07 15:25:26,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:25:26,994 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:25:26,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:25:26,995 INFO L82 PathProgramCache]: Analyzing trace with hash -536547191, now seen corresponding path program 1 times [2021-10-07 15:25:26,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:25:26,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948991343] [2021-10-07 15:25:26,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:25:26,996 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:25:26,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:25:26,998 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:25:26,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-07 15:25:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:25:27,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 15:25:27,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:25:27,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-07 15:25:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:25:27,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:25:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:25:28,724 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:25:28,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948991343] [2021-10-07 15:25:28,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948991343] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:25:28,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:25:28,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-07 15:25:28,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246318533] [2021-10-07 15:25:28,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 15:25:28,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:25:28,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 15:25:28,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:25:28,727 INFO L87 Difference]: Start difference. First operand 257 states and 778 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:25:31,695 INFO L93 Difference]: Finished difference Result 727 states and 1963 transitions. [2021-10-07 15:25:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:25:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 15:25:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:25:31,700 INFO L225 Difference]: With dead ends: 727 [2021-10-07 15:25:31,700 INFO L226 Difference]: Without dead ends: 725 [2021-10-07 15:25:31,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1851.5ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:25:31,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-10-07 15:25:31,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 322. [2021-10-07 15:25:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 309 states have (on average 3.27831715210356) internal successors, (1013), 321 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:31,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1013 transitions. [2021-10-07 15:25:31,713 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1013 transitions. Word has length 12 [2021-10-07 15:25:31,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:25:31,713 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1013 transitions. [2021-10-07 15:25:31,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:31,714 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1013 transitions. [2021-10-07 15:25:31,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 15:25:31,714 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:25:31,715 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:25:31,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-10-07 15:25:31,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:25:31,923 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:25:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:25:31,924 INFO L82 PathProgramCache]: Analyzing trace with hash -503593263, now seen corresponding path program 3 times [2021-10-07 15:25:31,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:25:31,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320490527] [2021-10-07 15:25:31,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:25:31,925 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:25:31,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:25:31,927 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:25:31,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-07 15:25:32,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:25:32,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:25:32,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 15:25:32,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:25:32,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:25:32,435 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:25:32,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 80 [2021-10-07 15:25:32,629 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-07 15:25:32,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 117 [2021-10-07 15:25:45,407 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-10-07 15:25:45,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 171 [2021-10-07 15:25:45,484 INFO L354 Elim1Store]: treesize reduction 7, result has 85.7 percent of original size [2021-10-07 15:25:45,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 191 treesize of output 220 [2021-10-07 15:25:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:25:48,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:25:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:25:50,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:25:50,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320490527] [2021-10-07 15:25:50,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320490527] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:25:50,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:25:50,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2021-10-07 15:25:50,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441052623] [2021-10-07 15:25:50,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-07 15:25:50,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:25:50,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-07 15:25:50,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:25:50,447 INFO L87 Difference]: Start difference. First operand 322 states and 1013 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:25:54,701 INFO L93 Difference]: Finished difference Result 600 states and 1638 transitions. [2021-10-07 15:25:54,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:25:54,702 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 15:25:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:25:54,706 INFO L225 Difference]: With dead ends: 600 [2021-10-07 15:25:54,707 INFO L226 Difference]: Without dead ends: 600 [2021-10-07 15:25:54,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 4009.6ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:25:54,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-10-07 15:25:54,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 374. [2021-10-07 15:25:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 361 states have (on average 3.3601108033241) internal successors, (1213), 373 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1213 transitions. [2021-10-07 15:25:54,721 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1213 transitions. Word has length 12 [2021-10-07 15:25:54,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:25:54,722 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1213 transitions. [2021-10-07 15:25:54,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1213 transitions. [2021-10-07 15:25:54,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 15:25:54,723 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:25:54,723 INFO L512 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2021-10-07 15:25:54,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-07 15:25:54,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:25:54,936 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:25:54,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:25:54,937 INFO L82 PathProgramCache]: Analyzing trace with hash 949479713, now seen corresponding path program 1 times [2021-10-07 15:25:54,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:25:54,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200433856] [2021-10-07 15:25:54,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:25:54,938 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:25:54,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:25:54,939 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:25:54,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-07 15:25:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:25:55,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 15:25:55,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:25:55,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-07 15:25:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:25:55,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:25:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:25:59,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:25:59,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200433856] [2021-10-07 15:25:59,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200433856] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:25:59,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:25:59,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-07 15:25:59,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042605335] [2021-10-07 15:25:59,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 15:25:59,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:25:59,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 15:25:59,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:25:59,535 INFO L87 Difference]: Start difference. First operand 374 states and 1213 transitions. Second operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:08,569 WARN L207 SmtUtils]: Spent 6.76 s on a formula simplification that was a NOOP. DAG size: 113 [2021-10-07 15:26:32,909 WARN L207 SmtUtils]: Spent 5.27 s on a formula simplification that was a NOOP. DAG size: 102 [2021-10-07 15:26:51,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:26:51,742 INFO L93 Difference]: Finished difference Result 4328 states and 14426 transitions. [2021-10-07 15:26:51,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:26:51,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 15:26:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:26:51,780 INFO L225 Difference]: With dead ends: 4328 [2021-10-07 15:26:51,781 INFO L226 Difference]: Without dead ends: 4328 [2021-10-07 15:26:51,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 27546.7ms TimeCoverageRelationStatistics Valid=339, Invalid=591, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:26:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2021-10-07 15:26:51,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 401. [2021-10-07 15:26:51,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 388 states have (on average 3.2577319587628866) internal successors, (1264), 400 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1264 transitions. [2021-10-07 15:26:51,836 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1264 transitions. Word has length 12 [2021-10-07 15:26:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:26:51,836 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1264 transitions. [2021-10-07 15:26:51,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:51,837 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1264 transitions. [2021-10-07 15:26:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 15:26:51,838 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:26:51,838 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-07 15:26:51,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-07 15:26:52,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:26:52,052 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:26:52,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:26:52,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1330794122, now seen corresponding path program 2 times [2021-10-07 15:26:52,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:26:52,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346634569] [2021-10-07 15:26:52,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:26:52,054 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:26:52,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:26:52,055 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:26:52,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-07 15:26:52,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:26:52,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:26:52,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 15:26:52,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:26:52,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-07 15:26:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:26:52,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:26:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:26:54,563 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:26:54,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346634569] [2021-10-07 15:26:54,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346634569] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:26:54,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:26:54,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 15:26:54,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507503229] [2021-10-07 15:26:54,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:26:54,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:26:54,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:26:54,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:26:54,566 INFO L87 Difference]: Start difference. First operand 401 states and 1264 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:26:59,018 INFO L93 Difference]: Finished difference Result 1126 states and 3404 transitions. [2021-10-07 15:26:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-07 15:26:59,020 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 15:26:59,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:26:59,029 INFO L225 Difference]: With dead ends: 1126 [2021-10-07 15:26:59,029 INFO L226 Difference]: Without dead ends: 1126 [2021-10-07 15:26:59,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2967.2ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:26:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-10-07 15:26:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 577. [2021-10-07 15:26:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 564 states have (on average 3.702127659574468) internal successors, (2088), 576 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:59,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 2088 transitions. [2021-10-07 15:26:59,059 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 2088 transitions. Word has length 13 [2021-10-07 15:26:59,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:26:59,059 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 2088 transitions. [2021-10-07 15:26:59,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:59,060 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 2088 transitions. [2021-10-07 15:26:59,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 15:26:59,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:26:59,061 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-07 15:26:59,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-07 15:26:59,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:26:59,276 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:26:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:26:59,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1330794179, now seen corresponding path program 2 times [2021-10-07 15:26:59,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:26:59,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078093288] [2021-10-07 15:26:59,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:26:59,278 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:26:59,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:26:59,280 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:26:59,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-07 15:26:59,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:26:59,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:26:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 15:26:59,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:26:59,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:26:59,860 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:26:59,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 80 [2021-10-07 15:27:00,045 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-07 15:27:00,046 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 80 treesize of output 117 [2021-10-07 15:27:14,171 INFO L354 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2021-10-07 15:27:14,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 352 treesize of output 390 [2021-10-07 15:27:14,278 INFO L354 Elim1Store]: treesize reduction 108, result has 18.8 percent of original size [2021-10-07 15:27:14,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 384 treesize of output 345 [2021-10-07 15:27:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:27:17,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:27:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:27:19,339 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:27:19,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078093288] [2021-10-07 15:27:19,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078093288] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:27:19,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:27:19,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2021-10-07 15:27:19,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645557328] [2021-10-07 15:27:19,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 15:27:19,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:27:19,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 15:27:19,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:27:19,341 INFO L87 Difference]: Start difference. First operand 577 states and 2088 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:24,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:27:24,356 INFO L93 Difference]: Finished difference Result 943 states and 2876 transitions. [2021-10-07 15:27:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:27:24,358 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 15:27:24,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:27:24,366 INFO L225 Difference]: With dead ends: 943 [2021-10-07 15:27:24,367 INFO L226 Difference]: Without dead ends: 943 [2021-10-07 15:27:24,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1788.3ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:27:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-10-07 15:27:24,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 577. [2021-10-07 15:27:24,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 564 states have (on average 3.5460992907801416) internal successors, (2000), 576 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 2000 transitions. [2021-10-07 15:27:24,387 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 2000 transitions. Word has length 13 [2021-10-07 15:27:24,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:27:24,387 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 2000 transitions. [2021-10-07 15:27:24,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 2000 transitions. [2021-10-07 15:27:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 15:27:24,388 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:27:24,388 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:27:24,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-07 15:27:24,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:27:24,602 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:27:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:27:24,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1104725784, now seen corresponding path program 1 times [2021-10-07 15:27:24,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:27:24,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526840467] [2021-10-07 15:27:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:27:24,604 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:27:24,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:27:24,605 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:27:24,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-07 15:27:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:27:24,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-07 15:27:24,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:27:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:25,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:27:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:25,083 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:27:25,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526840467] [2021-10-07 15:27:25,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526840467] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:27:25,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:27:25,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:27:25,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146451794] [2021-10-07 15:27:25,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:27:25,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:27:25,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:27:25,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:27:25,085 INFO L87 Difference]: Start difference. First operand 577 states and 2000 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) [2021-10-07 15:27:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:27:25,219 INFO L93 Difference]: Finished difference Result 610 states and 2065 transitions. [2021-10-07 15:27:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:27:25,219 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 [2021-10-07 15:27:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:27:25,223 INFO L225 Difference]: With dead ends: 610 [2021-10-07 15:27:25,223 INFO L226 Difference]: Without dead ends: 592 [2021-10-07 15:27:25,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:27:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-10-07 15:27:25,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-10-07 15:27:25,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 579 states have (on average 3.454231433506045) internal successors, (2000), 591 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:25,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 2000 transitions. [2021-10-07 15:27:25,239 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 2000 transitions. Word has length 13 [2021-10-07 15:27:25,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:27:25,240 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 2000 transitions. [2021-10-07 15:27:25,240 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) [2021-10-07 15:27:25,240 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 2000 transitions. [2021-10-07 15:27:25,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:27:25,241 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:27:25,241 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:27:25,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-07 15:27:25,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:27:25,455 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:27:25,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:27:25,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1378266066, now seen corresponding path program 2 times [2021-10-07 15:27:25,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:27:25,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000688201] [2021-10-07 15:27:25,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:27:25,458 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:27:25,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:27:25,459 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:27:25,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-07 15:27:25,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:27:25,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:27:25,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 15:27:25,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:27:25,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-07 15:27:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:27:26,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:27:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:27:28,069 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:27:28,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000688201] [2021-10-07 15:27:28,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000688201] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:27:28,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:27:28,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-07 15:27:28,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878300789] [2021-10-07 15:27:28,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:27:28,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:27:28,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:27:28,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:27:28,071 INFO L87 Difference]: Start difference. First operand 592 states and 2000 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-10-07 15:27:34,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:27:34,267 INFO L93 Difference]: Finished difference Result 1129 states and 3388 transitions. [2021-10-07 15:27:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:27:34,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 14 [2021-10-07 15:27:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:27:34,274 INFO L225 Difference]: With dead ends: 1129 [2021-10-07 15:27:34,275 INFO L226 Difference]: Without dead ends: 1123 [2021-10-07 15:27:34,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2863.1ms TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:27:34,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-10-07 15:27:34,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 720. [2021-10-07 15:27:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 709 states have (on average 3.544428772919605) internal successors, (2513), 719 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2513 transitions. [2021-10-07 15:27:34,301 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2513 transitions. Word has length 14 [2021-10-07 15:27:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:27:34,302 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 2513 transitions. [2021-10-07 15:27:34,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2021-10-07 15:27:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2513 transitions. [2021-10-07 15:27:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:27:34,303 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:27:34,303 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-07 15:27:34,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-10-07 15:27:34,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:27:34,517 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:27:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:27:34,518 INFO L82 PathProgramCache]: Analyzing trace with hash 946821704, now seen corresponding path program 3 times [2021-10-07 15:27:34,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:27:34,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548009365] [2021-10-07 15:27:34,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:27:34,519 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:27:34,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:27:34,520 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:27:34,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-07 15:27:35,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-07 15:27:35,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:27:35,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 15:27:35,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:27:35,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:27:35,439 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:27:35,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2021-10-07 15:27:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:36,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:27:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:43,833 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:27:43,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548009365] [2021-10-07 15:27:43,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548009365] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:27:43,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:27:43,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 15:27:43,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072687628] [2021-10-07 15:27:43,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 15:27:43,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:27:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 15:27:43,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:27:43,835 INFO L87 Difference]: Start difference. First operand 720 states and 2513 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:28:00,969 WARN L207 SmtUtils]: Spent 12.74 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-07 15:28:11,130 WARN L207 SmtUtils]: Spent 8.90 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-07 15:28:19,532 WARN L207 SmtUtils]: Spent 7.12 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-07 15:28:54,633 WARN L207 SmtUtils]: Spent 5.68 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-07 15:29:22,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:29:22,061 INFO L93 Difference]: Finished difference Result 6598 states and 23721 transitions. [2021-10-07 15:29:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:29:22,063 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:29:22,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:29:22,098 INFO L225 Difference]: With dead ends: 6598 [2021-10-07 15:29:22,098 INFO L226 Difference]: Without dead ends: 6598 [2021-10-07 15:29:22,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 66413.6ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 15:29:22,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2021-10-07 15:29:22,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 736. [2021-10-07 15:29:22,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 725 states have (on average 3.510344827586207) internal successors, (2545), 735 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:22,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2545 transitions. [2021-10-07 15:29:22,192 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2545 transitions. Word has length 16 [2021-10-07 15:29:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:29:22,193 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2545 transitions. [2021-10-07 15:29:22,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:22,193 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2545 transitions. [2021-10-07 15:29:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:29:22,194 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:29:22,194 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:29:22,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-07 15:29:22,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:29:22,409 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:29:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:29:22,409 INFO L82 PathProgramCache]: Analyzing trace with hash -658907088, now seen corresponding path program 3 times [2021-10-07 15:29:22,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:29:22,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949412035] [2021-10-07 15:29:22,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:29:22,411 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:29:22,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:29:22,412 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:29:22,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-07 15:29:23,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:29:23,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:29:23,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 15:29:23,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:29:23,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-07 15:29:23,410 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 15 treesize of output 11 [2021-10-07 15:29:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:29:23,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:29:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:29:24,148 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:29:24,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949412035] [2021-10-07 15:29:24,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949412035] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:29:24,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:29:24,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-07 15:29:24,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179831458] [2021-10-07 15:29:24,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:29:24,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:29:24,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:29:24,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:29:24,151 INFO L87 Difference]: Start difference. First operand 736 states and 2545 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-10-07 15:29:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:29:25,653 INFO L93 Difference]: Finished difference Result 1161 states and 3638 transitions. [2021-10-07 15:29:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:29:25,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 16 [2021-10-07 15:29:25,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:29:25,658 INFO L225 Difference]: With dead ends: 1161 [2021-10-07 15:29:25,658 INFO L226 Difference]: Without dead ends: 1161 [2021-10-07 15:29:25,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 722.6ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:29:25,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-10-07 15:29:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 869. [2021-10-07 15:29:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 858 states have (on average 3.516317016317016) internal successors, (3017), 868 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 3017 transitions. [2021-10-07 15:29:25,685 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 3017 transitions. Word has length 16 [2021-10-07 15:29:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:29:25,685 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 3017 transitions. [2021-10-07 15:29:25,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-10-07 15:29:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 3017 transitions. [2021-10-07 15:29:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:29:25,687 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:29:25,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:29:25,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-07 15:29:25,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:29:25,901 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:29:25,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:29:25,902 INFO L82 PathProgramCache]: Analyzing trace with hash 355461334, now seen corresponding path program 1 times [2021-10-07 15:29:25,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:29:25,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258861092] [2021-10-07 15:29:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:29:25,903 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:29:25,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:29:25,904 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:29:25,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-07 15:29:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:29:26,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 15:29:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:29:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:29:26,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:29:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:29:26,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:29:26,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258861092] [2021-10-07 15:29:26,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258861092] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:29:26,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:29:26,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:29:26,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810365525] [2021-10-07 15:29:26,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:29:26,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:29:26,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:29:26,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:29:26,969 INFO L87 Difference]: Start difference. First operand 869 states and 3017 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:28,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:29:28,703 INFO L93 Difference]: Finished difference Result 1241 states and 3885 transitions. [2021-10-07 15:29:28,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:29:28,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:29:28,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:29:28,709 INFO L225 Difference]: With dead ends: 1241 [2021-10-07 15:29:28,709 INFO L226 Difference]: Without dead ends: 1241 [2021-10-07 15:29:28,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 930.4ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:29:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-10-07 15:29:28,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 944. [2021-10-07 15:29:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 933 states have (on average 3.444801714898178) internal successors, (3214), 943 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3214 transitions. [2021-10-07 15:29:28,739 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3214 transitions. Word has length 16 [2021-10-07 15:29:28,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:29:28,741 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 3214 transitions. [2021-10-07 15:29:28,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:28,741 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3214 transitions. [2021-10-07 15:29:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:29:28,743 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:29:28,743 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:29:28,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-07 15:29:28,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:29:28,957 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:29:28,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:29:28,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1274125667, now seen corresponding path program 4 times [2021-10-07 15:29:28,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:29:28,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741120096] [2021-10-07 15:29:28,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:29:28,959 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:29:28,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:29:28,960 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:29:28,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-07 15:29:29,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:29:29,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:29:29,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-07 15:29:29,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:29:29,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-07 15:29:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-07 15:29:30,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:29:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:29:33,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:29:33,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741120096] [2021-10-07 15:29:33,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741120096] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:29:33,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:29:33,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2021-10-07 15:29:33,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97320565] [2021-10-07 15:29:33,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 15:29:33,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:29:33,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 15:29:33,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:29:33,135 INFO L87 Difference]: Start difference. First operand 944 states and 3214 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:41,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:29:41,327 INFO L93 Difference]: Finished difference Result 1421 states and 4083 transitions. [2021-10-07 15:29:41,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:29:41,330 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 17 [2021-10-07 15:29:41,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:29:41,336 INFO L225 Difference]: With dead ends: 1421 [2021-10-07 15:29:41,336 INFO L226 Difference]: Without dead ends: 1421 [2021-10-07 15:29:41,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 6036.6ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 15:29:41,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-10-07 15:29:41,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 806. [2021-10-07 15:29:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 795 states have (on average 3.3245283018867924) internal successors, (2643), 805 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2643 transitions. [2021-10-07 15:29:41,369 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2643 transitions. Word has length 17 [2021-10-07 15:29:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:29:41,369 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 2643 transitions. [2021-10-07 15:29:41,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2643 transitions. [2021-10-07 15:29:41,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:29:41,371 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:29:41,371 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:29:41,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-07 15:29:41,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:29:41,584 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:29:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:29:41,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1560437727, now seen corresponding path program 5 times [2021-10-07 15:29:41,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:29:41,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70257173] [2021-10-07 15:29:41,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:29:41,586 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:29:41,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:29:41,587 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:29:41,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-07 15:29:42,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:29:42,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:29:42,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 15:29:42,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:29:42,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-07 15:29:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-07 15:29:42,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:29:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-07 15:29:45,231 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:29:45,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70257173] [2021-10-07 15:29:45,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70257173] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:29:45,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:29:45,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 15:29:45,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727525687] [2021-10-07 15:29:45,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:29:45,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:29:45,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:29:45,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:29:45,234 INFO L87 Difference]: Start difference. First operand 806 states and 2643 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-10-07 15:29:53,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:29:53,017 INFO L93 Difference]: Finished difference Result 1544 states and 4726 transitions. [2021-10-07 15:29:53,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:29:53,018 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 17 [2021-10-07 15:29:53,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:29:53,023 INFO L225 Difference]: With dead ends: 1544 [2021-10-07 15:29:53,024 INFO L226 Difference]: Without dead ends: 1544 [2021-10-07 15:29:53,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 4011.6ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:29:53,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-10-07 15:29:53,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 950. [2021-10-07 15:29:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 939 states have (on average 3.526091586794462) internal successors, (3311), 949 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 3311 transitions. [2021-10-07 15:29:53,055 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 3311 transitions. Word has length 17 [2021-10-07 15:29:53,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:29:53,055 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 3311 transitions. [2021-10-07 15:29:53,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-10-07 15:29:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 3311 transitions. [2021-10-07 15:29:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:29:53,057 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:29:53,057 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:29:53,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-07 15:29:53,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:29:53,273 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:29:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:29:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2124620841, now seen corresponding path program 1 times [2021-10-07 15:29:53,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:29:53,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050260225] [2021-10-07 15:29:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:29:53,275 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:29:53,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:29:53,276 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:29:53,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-07 15:29:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:29:53,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-07 15:29:53,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:29:53,974 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 404 treesize of output 372 [2021-10-07 15:32:37,299 WARN L207 SmtUtils]: Spent 2.70 m on a formula simplification. DAG size of input: 371 DAG size of output: 94 [2021-10-07 15:32:37,300 INFO L354 Elim1Store]: treesize reduction 1929, result has 10.4 percent of original size [2021-10-07 15:32:37,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 100 treesize of output 258 [2021-10-07 15:34:49,168 WARN L207 SmtUtils]: Spent 1.24 m on a formula simplification that was a NOOP. DAG size: 99 Received shutdown request... [2021-10-07 15:34:52,377 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 [2021-10-07 15:34:52,398 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 15:34:53,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-07 15:34:53,554 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 15:34:53,555 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. [2021-10-07 15:34:53,557 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 15:34:53,558 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 15:34:53,558 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-07 15:34:53,558 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-07 15:34:53,558 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 15:34:53,558 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 15:34:53,558 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-07 15:34:53,558 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-07 15:34:53,558 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 15:34:53,559 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 15:34:53,559 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 15:34:53,559 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 15:34:53,559 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 15:34:53,559 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 15:34:53,560 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 15:34:53,560 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 15:34:53,560 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-07 15:34:53,560 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-07 15:34:53,560 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-07 15:34:53,561 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-07 15:34:53,562 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 15:34:53,562 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 15:34:53,562 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 15:34:53,562 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 15:34:53,562 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 15:34:53,563 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-07 15:34:53,563 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-07 15:34:53,563 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 15:34:53,563 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 15:34:53,564 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-07 15:34:53,564 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-07 15:34:53,578 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-07 15:34:53,583 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 15:34:53,583 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 15:34:53,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 03:34:53 BasicIcfg [2021-10-07 15:34:53,585 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 15:34:53,586 INFO L168 Benchmark]: Toolchain (without parser) took 834742.81 ms. Allocated memory was 151.0 MB in the beginning and 231.7 MB in the end (delta: 80.7 MB). Free memory was 126.2 MB in the beginning and 79.0 MB in the end (delta: 47.1 MB). Peak memory consumption was 128.6 MB. Max. memory is 8.0 GB. [2021-10-07 15:34:53,587 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory was 122.5 MB in the beginning and 122.4 MB in the end (delta: 80.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 15:34:53,587 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.16 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 113.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-10-07 15:34:53,587 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.81 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 111.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-07 15:34:53,588 INFO L168 Benchmark]: Boogie Preprocessor took 86.93 ms. Allocated memory is still 151.0 MB. Free memory was 111.4 MB in the beginning and 109.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 15:34:53,588 INFO L168 Benchmark]: RCFGBuilder took 920.44 ms. Allocated memory is still 151.0 MB. Free memory was 109.7 MB in the beginning and 124.3 MB in the end (delta: -14.6 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-10-07 15:34:53,588 INFO L168 Benchmark]: TraceAbstraction took 833264.17 ms. Allocated memory was 151.0 MB in the beginning and 231.7 MB in the end (delta: 80.7 MB). Free memory was 123.8 MB in the beginning and 79.0 MB in the end (delta: 44.8 MB). Peak memory consumption was 126.0 MB. Max. memory is 8.0 GB. [2021-10-07 15:34:53,590 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory was 122.5 MB in the beginning and 122.4 MB in the end (delta: 80.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 360.16 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 113.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 87.81 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 111.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 86.93 ms. Allocated memory is still 151.0 MB. Free memory was 111.4 MB in the beginning and 109.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 920.44 ms. Allocated memory is still 151.0 MB. Free memory was 109.7 MB in the beginning and 124.3 MB in the end (delta: -14.6 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 833264.17 ms. Allocated memory was 151.0 MB in the beginning and 231.7 MB in the end (delta: 80.7 MB). Free memory was 123.8 MB in the beginning and 79.0 MB in the end (delta: 44.8 MB). Peak memory consumption was 126.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 26158.6ms, 168 PlacesBefore, 45 PlacesAfterwards, 176 TransitionsBefore, 43 TransitionsAfterwards, 1720 CoEnabledTransitionPairs, 7 FixpointIterations, 104 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 22 TrivialYvCompositions, 10 ConcurrentYvCompositions, 10 ChoiceCompositions, 195 TotalNumberOfCompositions, 2614 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2200, positive: 2155, positive conditional: 0, positive unconditional: 2155, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1148, positive: 1137, positive conditional: 0, positive unconditional: 1137, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1148, positive: 1137, positive conditional: 0, positive unconditional: 1137, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 11, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 655, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 655, negative conditional: 0, negative unconditional: 655, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2200, positive: 1018, positive conditional: 0, positive unconditional: 1018, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 1148, unknown conditional: 0, unknown unconditional: 1148] , Statistics on independence cache: Total cache size (in pairs): 91, Positive cache size: 88, Positive conditional cache size: 0, Positive unconditional cache size: 88, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3 - 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: 85]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 79]: 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 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 80]: 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 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 200 locations, 32 error locations. Started 1 CEGAR loops. OverallTime: 833092.7ms, OverallIterations: 36, TraceHistogramMax: 14, EmptinessCheckTime: 37.1ms, AutomataDifference: 278227.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26255.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 783 SDtfs, 10800 SDslu, 4201 SDs, 0 SdLazy, 13236 SolverSat, 1031 SolverUnsat, 35 SolverUnknown, 0 SolverNotchecked, 154932.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 696 GetRequests, 260 SyntacticMatches, 12 SemanticMatches, 424 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 160175.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=950occurred in iteration=35, InterpolantAutomatonStates: 355, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 667.5ms AutomataMinimizationTime, 35 MinimizatonAttempts, 17628 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 311.4ms SsaConstructionTime, 3449.2ms SatisfiabilityAnalysisTime, 210736.1ms InterpolantComputationTime, 322 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 574 ConstructedInterpolants, 139 QuantifiedInterpolants, 17838 SizeOfPredicates, 234 NumberOfNonLiveVariables, 3232 ConjunctsInSsa, 455 ConjunctsInUnsatCore, 70 InterpolantComputations, 30 PerfectInterpolantSequences, 168/662 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