/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 20:41:05,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 20:41:05,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 20:41:05,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 20:41:05,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 20:41:05,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 20:41:05,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 20:41:06,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 20:41:06,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 20:41:06,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 20:41:06,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 20:41:06,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 20:41:06,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 20:41:06,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 20:41:06,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 20:41:06,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 20:41:06,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 20:41:06,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 20:41:06,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 20:41:06,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 20:41:06,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 20:41:06,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 20:41:06,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 20:41:06,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 20:41:06,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 20:41:06,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 20:41:06,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 20:41:06,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 20:41:06,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 20:41:06,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 20:41:06,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 20:41:06,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 20:41:06,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 20:41:06,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 20:41:06,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 20:41:06,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 20:41:06,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 20:41:06,087 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 20:41:06,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 20:41:06,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 20:41:06,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 20:41:06,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 20:41:06,146 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 20:41:06,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 20:41:06,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 20:41:06,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 20:41:06,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 20:41:06,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 20:41:06,152 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 20:41:06,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 20:41:06,152 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 20:41:06,152 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 20:41:06,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 20:41:06,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 20:41:06,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 20:41:06,154 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 20:41:06,154 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 20:41:06,155 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 20:41:06,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 20:41:06,155 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 20:41:06,155 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 20:41:06,156 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 20:41:06,156 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 20:41:06,156 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 20:41:06,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 20:41:06,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 20:41:06,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 20:41:06,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 20:41:06,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 20:41:06,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 20:41:06,157 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 20:41:06,158 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 20:41:06,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 20:41:06,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 20:41:06,158 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 20:41:06,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 20:41:06,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 20:41:06,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 20:41:06,605 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 20:41:06,607 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 20:41:06,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2021-10-13 20:41:06,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27505be93/4e2d952b010f47549491bf2d8d0576df/FLAG32a385b71 [2021-10-13 20:41:07,400 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 20:41:07,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2021-10-13 20:41:07,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27505be93/4e2d952b010f47549491bf2d8d0576df/FLAG32a385b71 [2021-10-13 20:41:07,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27505be93/4e2d952b010f47549491bf2d8d0576df [2021-10-13 20:41:07,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 20:41:07,766 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 20:41:07,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 20:41:07,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 20:41:07,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 20:41:07,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:41:07" (1/1) ... [2021-10-13 20:41:07,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6285e2b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:41:07, skipping insertion in model container [2021-10-13 20:41:07,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:41:07" (1/1) ... [2021-10-13 20:41:07,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 20:41:07,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 20:41:08,131 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[3603,3616] [2021-10-13 20:41:08,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 20:41:08,192 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-13 20:41:08,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 20:41:08,266 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[3603,3616] [2021-10-13 20:41:08,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 20:41:08,279 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 20:41:08,312 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[3603,3616] [2021-10-13 20:41:08,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 20:41:08,341 INFO L208 MainTranslator]: Completed translation [2021-10-13 20:41:08,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:41:08 WrapperNode [2021-10-13 20:41:08,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 20:41:08,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 20:41:08,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 20:41:08,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 20:41:08,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:41:08" (1/1) ... [2021-10-13 20:41:08,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:41:08" (1/1) ... [2021-10-13 20:41:08,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 20:41:08,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 20:41:08,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 20:41:08,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 20:41:08,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:41:08" (1/1) ... [2021-10-13 20:41:08,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:41:08" (1/1) ... [2021-10-13 20:41:08,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:41:08" (1/1) ... [2021-10-13 20:41:08,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:41:08" (1/1) ... [2021-10-13 20:41:08,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:41:08" (1/1) ... [2021-10-13 20:41:08,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:41:08" (1/1) ... [2021-10-13 20:41:08,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:41:08" (1/1) ... [2021-10-13 20:41:08,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 20:41:08,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 20:41:08,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 20:41:08,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 20:41:08,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:41:08" (1/1) ... [2021-10-13 20:41:08,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 20:41:08,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 20:41:08,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 20:41:08,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 20:41:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 20:41:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 20:41:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 20:41:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 20:41:08,674 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 20:41:08,674 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 20:41:08,676 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 20:41:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-13 20:41:08,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-13 20:41:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-13 20:41:08,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-13 20:41:08,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 20:41:08,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 20:41:08,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 20:41:08,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 20:41:08,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 20:41:08,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 20:41:08,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 20:41:08,682 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 20:41:10,789 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 20:41:10,789 INFO L299 CfgBuilder]: Removed 52 assume(true) statements. [2021-10-13 20:41:10,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:41:10 BoogieIcfgContainer [2021-10-13 20:41:10,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 20:41:10,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 20:41:10,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 20:41:10,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 20:41:10,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:41:07" (1/3) ... [2021-10-13 20:41:10,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3581edbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:41:10, skipping insertion in model container [2021-10-13 20:41:10,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:41:08" (2/3) ... [2021-10-13 20:41:10,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3581edbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:41:10, skipping insertion in model container [2021-10-13 20:41:10,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:41:10" (3/3) ... [2021-10-13 20:41:10,803 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2021-10-13 20:41:10,809 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 20:41:10,810 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2021-10-13 20:41:10,810 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 20:41:10,860 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,860 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,861 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,861 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,861 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,861 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,862 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,862 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,862 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,862 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,863 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,863 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,863 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,863 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,864 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,864 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,864 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,865 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,865 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,867 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,868 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,868 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,869 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,870 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,873 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,874 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,875 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,875 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,876 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~short8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,876 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~short8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,877 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~short8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,877 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~short8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,877 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~short8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,878 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,878 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,878 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,883 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,883 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~short8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,884 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,884 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,884 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,884 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,886 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,886 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,887 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,887 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,888 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,888 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,889 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,890 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,890 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,890 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,891 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,891 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,892 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,892 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,892 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,892 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,894 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,894 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,894 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,894 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,895 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,895 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,895 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,895 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,895 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,896 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,896 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,896 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,897 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,897 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,898 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,898 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,898 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,898 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,898 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,898 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,899 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,899 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,903 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,903 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,904 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,904 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,905 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,906 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,908 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,909 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,912 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,916 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,917 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,917 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,917 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,917 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,917 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,918 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,918 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,918 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~ret15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,918 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,918 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,918 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,919 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,919 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,919 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,920 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,920 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,923 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,923 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~ret15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,924 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,924 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,924 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,924 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,929 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,930 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,930 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,930 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,930 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,931 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,931 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,931 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,934 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,934 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,935 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,935 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,935 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,935 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,935 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,936 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,936 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,936 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,936 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,936 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,940 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,941 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,941 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,941 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~short8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,941 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,941 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,942 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,942 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,944 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,945 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,945 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,946 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,946 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~ret15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,946 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,946 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,946 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,947 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,947 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,947 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,947 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 20:41:10,957 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-13 20:41:11,014 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 20:41:11,023 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 20:41:11,023 INFO L340 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2021-10-13 20:41:11,043 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 20:41:11,056 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 236 places, 242 transitions, 516 flow [2021-10-13 20:41:11,059 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 236 places, 242 transitions, 516 flow [2021-10-13 20:41:11,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 236 places, 242 transitions, 516 flow [2021-10-13 20:41:11,187 INFO L129 PetriNetUnfolder]: 19/238 cut-off events. [2021-10-13 20:41:11,187 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-13 20:41:11,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 238 events. 19/238 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 200 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 191. Up to 2 conditions per place. [2021-10-13 20:41:11,207 INFO L116 LiptonReduction]: Number of co-enabled transitions 2972 [2021-10-13 20:41:50,918 INFO L131 LiptonReduction]: Checked pairs total: 6663 [2021-10-13 20:41:50,919 INFO L133 LiptonReduction]: Total number of compositions: 250 [2021-10-13 20:41:50,940 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 74 places, 67 transitions, 166 flow [2021-10-13 20:41:51,160 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3753 states, 3347 states have (on average 4.950702121302659) internal successors, (16570), 3752 states have internal predecessors, (16570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:41:51,181 INFO L276 IsEmpty]: Start isEmpty. Operand has 3753 states, 3347 states have (on average 4.950702121302659) internal successors, (16570), 3752 states have internal predecessors, (16570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:41:51,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 20:41:51,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:41:51,188 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 20:41:51,189 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:41:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:41:51,197 INFO L82 PathProgramCache]: Analyzing trace with hash 36858, now seen corresponding path program 1 times [2021-10-13 20:41:51,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:41:51,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865508092] [2021-10-13 20:41:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:41:51,216 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:41:51,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:41:51,222 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:41:51,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 20:41:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:41:51,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 20:41:51,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:41:51,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:41:51,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:41:51,999 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-13 20:41:52,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-13 20:41:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:41:52,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:41:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:41:52,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:41:52,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865508092] [2021-10-13 20:41:52,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865508092] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:41:52,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:41:52,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 20:41:52,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450211948] [2021-10-13 20:41:52,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:41:52,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:41:52,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:41:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:41:52,319 INFO L87 Difference]: Start difference. First operand has 3753 states, 3347 states have (on average 4.950702121302659) internal successors, (16570), 3752 states have internal predecessors, (16570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:41:53,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:41:53,336 INFO L93 Difference]: Finished difference Result 7505 states and 33143 transitions. [2021-10-13 20:41:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 20:41:53,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 20:41:53,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:41:53,469 INFO L225 Difference]: With dead ends: 7505 [2021-10-13 20:41:53,469 INFO L226 Difference]: Without dead ends: 7505 [2021-10-13 20:41:53,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:41:53,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7505 states. [2021-10-13 20:41:53,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7505 to 3756. [2021-10-13 20:41:53,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3756 states, 3351 states have (on average 4.949268874962698) internal successors, (16585), 3755 states have internal predecessors, (16585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:41:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3756 states to 3756 states and 16585 transitions. [2021-10-13 20:41:54,014 INFO L78 Accepts]: Start accepts. Automaton has 3756 states and 16585 transitions. Word has length 2 [2021-10-13 20:41:54,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:41:54,017 INFO L470 AbstractCegarLoop]: Abstraction has 3756 states and 16585 transitions. [2021-10-13 20:41:54,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:41:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3756 states and 16585 transitions. [2021-10-13 20:41:54,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 20:41:54,019 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:41:54,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 20:41:54,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 20:41:54,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:41:54,237 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:41:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:41:54,239 INFO L82 PathProgramCache]: Analyzing trace with hash 36859, now seen corresponding path program 1 times [2021-10-13 20:41:54,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:41:54,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149113570] [2021-10-13 20:41:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:41:54,244 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:41:54,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:41:54,245 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:41:54,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 20:41:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:41:54,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 20:41:54,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:41:54,448 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-10-13 20:41:54,448 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 4 case distinctions, treesize of input 18 treesize of output 38 [2021-10-13 20:41:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:41:54,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:41:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:41:54,505 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:41:54,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149113570] [2021-10-13 20:41:54,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149113570] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:41:54,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:41:54,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 20:41:54,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416371026] [2021-10-13 20:41:54,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 20:41:54,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:41:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 20:41:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 20:41:54,509 INFO L87 Difference]: Start difference. First operand 3756 states and 16585 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:41:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:41:54,785 INFO L93 Difference]: Finished difference Result 3754 states and 16579 transitions. [2021-10-13 20:41:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:41:54,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 20:41:54,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:41:54,908 INFO L225 Difference]: With dead ends: 3754 [2021-10-13 20:41:54,908 INFO L226 Difference]: Without dead ends: 3754 [2021-10-13 20:41:54,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 20:41:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2021-10-13 20:41:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3754. [2021-10-13 20:41:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3754 states, 3351 states have (on average 4.947478364667264) internal successors, (16579), 3753 states have internal predecessors, (16579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:41:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3754 states to 3754 states and 16579 transitions. [2021-10-13 20:41:55,213 INFO L78 Accepts]: Start accepts. Automaton has 3754 states and 16579 transitions. Word has length 2 [2021-10-13 20:41:55,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:41:55,214 INFO L470 AbstractCegarLoop]: Abstraction has 3754 states and 16579 transitions. [2021-10-13 20:41:55,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:41:55,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3754 states and 16579 transitions. [2021-10-13 20:41:55,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 20:41:55,214 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:41:55,214 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 20:41:55,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 20:41:55,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:41:55,428 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:41:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:41:55,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1148712, now seen corresponding path program 1 times [2021-10-13 20:41:55,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:41:55,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989348625] [2021-10-13 20:41:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:41:55,430 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:41:55,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:41:55,432 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:41:55,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 20:41:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:41:55,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 20:41:55,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:41:55,735 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-10-13 20:41:55,735 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 10 case distinctions, treesize of input 73 treesize of output 86 [2021-10-13 20:41:56,268 INFO L354 Elim1Store]: treesize reduction 135, result has 23.3 percent of original size [2021-10-13 20:41:56,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 83 treesize of output 112 [2021-10-13 20:41:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:41:56,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:41:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:41:56,696 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:41:56,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989348625] [2021-10-13 20:41:56,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989348625] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:41:56,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:41:56,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 20:41:56,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74993154] [2021-10-13 20:41:56,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:41:56,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:41:56,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:41:56,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:41:56,701 INFO L87 Difference]: Start difference. First operand 3754 states and 16579 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) [2021-10-13 20:41:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:41:57,118 INFO L93 Difference]: Finished difference Result 3128 states and 13451 transitions. [2021-10-13 20:41:57,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:41:57,120 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 [2021-10-13 20:41:57,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:41:57,156 INFO L225 Difference]: With dead ends: 3128 [2021-10-13 20:41:57,157 INFO L226 Difference]: Without dead ends: 3128 [2021-10-13 20:41:57,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:41:57,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3128 states. [2021-10-13 20:41:57,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3128 to 3128. [2021-10-13 20:41:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 2807 states have (on average 4.791948699679373) internal successors, (13451), 3127 states have internal predecessors, (13451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:41:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 13451 transitions. [2021-10-13 20:41:57,359 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 13451 transitions. Word has length 3 [2021-10-13 20:41:57,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:41:57,360 INFO L470 AbstractCegarLoop]: Abstraction has 3128 states and 13451 transitions. [2021-10-13 20:41:57,360 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) [2021-10-13 20:41:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 13451 transitions. [2021-10-13 20:41:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 20:41:57,360 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:41:57,360 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 20:41:57,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 20:41:57,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:41:57,574 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:41:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:41:57,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1148713, now seen corresponding path program 1 times [2021-10-13 20:41:57,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:41:57,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986877604] [2021-10-13 20:41:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:41:57,576 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:41:57,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:41:57,577 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:41:57,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 20:41:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:41:57,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 20:41:57,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:41:58,287 INFO L354 Elim1Store]: treesize reduction 349, result has 18.3 percent of original size [2021-10-13 20:41:58,287 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 6 case distinctions, treesize of input 72 treesize of output 130 [2021-10-13 20:41:58,312 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-13 20:41:58,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 130 [2021-10-13 20:42:02,585 INFO L354 Elim1Store]: treesize reduction 120, result has 35.5 percent of original size [2021-10-13 20:42:02,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 135 [2021-10-13 20:42:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:42:33,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:42:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:42:33,861 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:42:33,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986877604] [2021-10-13 20:42:33,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986877604] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:42:33,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:42:33,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 20:42:33,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090126887] [2021-10-13 20:42:33,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 20:42:33,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:42:33,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 20:42:33,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=17, Unknown=1, NotChecked=0, Total=30 [2021-10-13 20:42:33,864 INFO L87 Difference]: Start difference. First operand 3128 states and 13451 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) [2021-10-13 20:42:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:42:43,824 INFO L93 Difference]: Finished difference Result 2502 states and 10323 transitions. [2021-10-13 20:42:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 20:42:43,826 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 [2021-10-13 20:42:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:42:43,844 INFO L225 Difference]: With dead ends: 2502 [2021-10-13 20:42:43,844 INFO L226 Difference]: Without dead ends: 2502 [2021-10-13 20:42:43,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2367.8ms TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2021-10-13 20:42:43,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2021-10-13 20:42:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 2502. [2021-10-13 20:42:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2263 states have (on average 4.561643835616438) internal successors, (10323), 2501 states have internal predecessors, (10323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:42:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 10323 transitions. [2021-10-13 20:42:43,954 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 10323 transitions. Word has length 3 [2021-10-13 20:42:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:42:43,954 INFO L470 AbstractCegarLoop]: Abstraction has 2502 states and 10323 transitions. [2021-10-13 20:42:43,954 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) [2021-10-13 20:42:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 10323 transitions. [2021-10-13 20:42:43,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 20:42:43,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:42:43,955 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-13 20:42:43,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-13 20:42:44,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:42:44,156 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:42:44,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:42:44,157 INFO L82 PathProgramCache]: Analyzing trace with hash 35574266, now seen corresponding path program 1 times [2021-10-13 20:42:44,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:42:44,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573066023] [2021-10-13 20:42:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:42:44,159 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:42:44,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:42:44,160 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:42:44,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 20:42:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:42:44,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 20:42:44,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:42:44,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:42:44,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:42:44,749 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-13 20:42:44,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-13 20:42:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:42:44,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:42:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:42:45,377 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:42:45,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573066023] [2021-10-13 20:42:45,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573066023] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:42:45,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:42:45,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 20:42:45,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515004006] [2021-10-13 20:42:45,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 20:42:45,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:42:45,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 20:42:45,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 20:42:45,379 INFO L87 Difference]: Start difference. First operand 2502 states and 10323 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:42:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:42:51,147 INFO L93 Difference]: Finished difference Result 14975 states and 61879 transitions. [2021-10-13 20:42:51,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 20:42:51,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 20:42:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:42:51,291 INFO L225 Difference]: With dead ends: 14975 [2021-10-13 20:42:51,291 INFO L226 Difference]: Without dead ends: 14975 [2021-10-13 20:42:51,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 864.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 20:42:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14975 states. [2021-10-13 20:42:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14975 to 2510. [2021-10-13 20:42:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 2271 states have (on average 4.552619991193307) internal successors, (10339), 2509 states have internal predecessors, (10339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:42:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 10339 transitions. [2021-10-13 20:42:51,713 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 10339 transitions. Word has length 4 [2021-10-13 20:42:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:42:51,715 INFO L470 AbstractCegarLoop]: Abstraction has 2510 states and 10339 transitions. [2021-10-13 20:42:51,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:42:51,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 10339 transitions. [2021-10-13 20:42:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 20:42:51,716 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:42:51,716 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 20:42:51,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 20:42:51,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:42:51,933 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:42:51,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:42:51,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1103942112, now seen corresponding path program 1 times [2021-10-13 20:42:51,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:42:51,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584399423] [2021-10-13 20:42:51,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:42:51,935 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:42:51,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:42:51,936 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:42:51,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 20:42:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:42:52,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 20:42:52,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:42:52,584 INFO L354 Elim1Store]: treesize reduction 349, result has 18.3 percent of original size [2021-10-13 20:42:52,585 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 6 case distinctions, treesize of input 63 treesize of output 121 [2021-10-13 20:42:52,606 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 20:42:52,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 122 [2021-10-13 20:42:56,292 INFO L354 Elim1Store]: treesize reduction 120, result has 35.5 percent of original size [2021-10-13 20:42:56,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 131 [2021-10-13 20:43:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:43:46,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:43:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:43:46,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:43:46,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584399423] [2021-10-13 20:43:46,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584399423] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:43:46,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:43:46,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 20:43:46,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707376158] [2021-10-13 20:43:46,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 20:43:46,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:43:46,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 20:43:46,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=17, Unknown=1, NotChecked=0, Total=30 [2021-10-13 20:43:46,562 INFO L87 Difference]: Start difference. First operand 2510 states and 10339 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) [2021-10-13 20:43:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:43:58,725 INFO L93 Difference]: Finished difference Result 2380 states and 9829 transitions. [2021-10-13 20:43:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 20:43:58,727 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 [2021-10-13 20:43:58,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:43:58,741 INFO L225 Difference]: With dead ends: 2380 [2021-10-13 20:43:58,742 INFO L226 Difference]: Without dead ends: 2380 [2021-10-13 20:43:58,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2992.5ms TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2021-10-13 20:43:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-10-13 20:43:58,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2380. [2021-10-13 20:43:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2171 states have (on average 4.527406725011516) internal successors, (9829), 2379 states have internal predecessors, (9829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:43:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 9829 transitions. [2021-10-13 20:43:58,837 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 9829 transitions. Word has length 5 [2021-10-13 20:43:58,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:43:58,838 INFO L470 AbstractCegarLoop]: Abstraction has 2380 states and 9829 transitions. [2021-10-13 20:43:58,838 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) [2021-10-13 20:43:58,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 9829 transitions. [2021-10-13 20:43:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 20:43:58,839 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:43:58,839 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 20:43:58,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 20:43:59,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:43:59,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:43:59,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:43:59,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1103942113, now seen corresponding path program 1 times [2021-10-13 20:43:59,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:43:59,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315058208] [2021-10-13 20:43:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:43:59,041 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:43:59,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:43:59,043 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:43:59,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 20:43:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:43:59,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 20:43:59,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:43:59,319 INFO L354 Elim1Store]: treesize reduction 160, result has 17.1 percent of original size [2021-10-13 20:43:59,320 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 7 case distinctions, treesize of input 63 treesize of output 78 [2021-10-13 20:43:59,647 INFO L354 Elim1Store]: treesize reduction 135, result has 23.3 percent of original size [2021-10-13 20:43:59,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 110 [2021-10-13 20:44:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:00,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:00,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:00,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315058208] [2021-10-13 20:44:00,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315058208] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:44:00,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:44:00,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 20:44:00,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402939046] [2021-10-13 20:44:00,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:44:00,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:00,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:44:00,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:44:00,401 INFO L87 Difference]: Start difference. First operand 2380 states and 9829 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) [2021-10-13 20:44:00,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:00,692 INFO L93 Difference]: Finished difference Result 2250 states and 9319 transitions. [2021-10-13 20:44:00,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:44:00,693 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 [2021-10-13 20:44:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:00,705 INFO L225 Difference]: With dead ends: 2250 [2021-10-13 20:44:00,705 INFO L226 Difference]: Without dead ends: 2250 [2021-10-13 20:44:00,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 394.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:44:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2021-10-13 20:44:00,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2250. [2021-10-13 20:44:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2071 states have (on average 4.4997585707387735) internal successors, (9319), 2249 states have internal predecessors, (9319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 9319 transitions. [2021-10-13 20:44:00,814 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 9319 transitions. Word has length 5 [2021-10-13 20:44:00,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:00,815 INFO L470 AbstractCegarLoop]: Abstraction has 2250 states and 9319 transitions. [2021-10-13 20:44:00,815 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) [2021-10-13 20:44:00,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 9319 transitions. [2021-10-13 20:44:00,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 20:44:00,815 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:00,816 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 20:44:00,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 20:44:01,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:44:01,029 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:44:01,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:01,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1103942021, now seen corresponding path program 1 times [2021-10-13 20:44:01,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:01,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715445526] [2021-10-13 20:44:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:44:01,031 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:01,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:01,033 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:44:01,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 20:44:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:44:01,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 20:44:01,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:01,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:01,258 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:01,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715445526] [2021-10-13 20:44:01,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715445526] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:44:01,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:44:01,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 20:44:01,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096111274] [2021-10-13 20:44:01,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 20:44:01,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 20:44:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 20:44:01,260 INFO L87 Difference]: Start difference. First operand 2250 states and 9319 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) [2021-10-13 20:44:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:01,490 INFO L93 Difference]: Finished difference Result 2955 states and 11673 transitions. [2021-10-13 20:44:01,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 20:44:01,492 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 [2021-10-13 20:44:01,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:01,506 INFO L225 Difference]: With dead ends: 2955 [2021-10-13 20:44:01,507 INFO L226 Difference]: Without dead ends: 2954 [2021-10-13 20:44:01,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 20:44:01,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2021-10-13 20:44:01,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2781. [2021-10-13 20:44:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2781 states, 2582 states have (on average 4.362122385747482) internal successors, (11263), 2780 states have internal predecessors, (11263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:01,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2781 states to 2781 states and 11263 transitions. [2021-10-13 20:44:01,718 INFO L78 Accepts]: Start accepts. Automaton has 2781 states and 11263 transitions. Word has length 5 [2021-10-13 20:44:01,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:01,718 INFO L470 AbstractCegarLoop]: Abstraction has 2781 states and 11263 transitions. [2021-10-13 20:44:01,718 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) [2021-10-13 20:44:01,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2781 states and 11263 transitions. [2021-10-13 20:44:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 20:44:01,719 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:01,719 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 20:44:01,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 20:44:01,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:44:01,933 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:44:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:01,934 INFO L82 PathProgramCache]: Analyzing trace with hash -171580043, now seen corresponding path program 1 times [2021-10-13 20:44:01,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:01,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492687516] [2021-10-13 20:44:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:44:01,935 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:01,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:01,937 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:44:01,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 20:44:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:44:02,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 20:44:02,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:02,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:44:02,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:44:02,646 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-13 20:44:02,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 107 [2021-10-13 20:44:02,805 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-10-13 20:44:02,805 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 4 case distinctions, treesize of input 107 treesize of output 126 [2021-10-13 20:44:03,024 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 20:44:03,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-10-13 20:44:03,037 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 20:44:03,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-10-13 20:44:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:03,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:44:05,047 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:05,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492687516] [2021-10-13 20:44:05,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492687516] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:44:05,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:44:05,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 20:44:05,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799661712] [2021-10-13 20:44:05,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 20:44:05,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:05,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 20:44:05,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 20:44:05,049 INFO L87 Difference]: Start difference. First operand 2781 states and 11263 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) [2021-10-13 20:44:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:23,345 INFO L93 Difference]: Finished difference Result 8026 states and 32286 transitions. [2021-10-13 20:44:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 20:44:23,347 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 [2021-10-13 20:44:23,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:23,443 INFO L225 Difference]: With dead ends: 8026 [2021-10-13 20:44:23,443 INFO L226 Difference]: Without dead ends: 8026 [2021-10-13 20:44:23,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 11725.1ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-13 20:44:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2021-10-13 20:44:23,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 3837. [2021-10-13 20:44:23,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3837 states, 3638 states have (on average 4.5065970313358985) internal successors, (16395), 3836 states have internal predecessors, (16395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 16395 transitions. [2021-10-13 20:44:23,647 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 16395 transitions. Word has length 6 [2021-10-13 20:44:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:23,648 INFO L470 AbstractCegarLoop]: Abstraction has 3837 states and 16395 transitions. [2021-10-13 20:44:23,648 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) [2021-10-13 20:44:23,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 16395 transitions. [2021-10-13 20:44:23,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 20:44:23,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:23,649 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 20:44:23,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 20:44:23,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:44:23,863 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:44:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:23,864 INFO L82 PathProgramCache]: Analyzing trace with hash -171580042, now seen corresponding path program 1 times [2021-10-13 20:44:23,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:23,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755950964] [2021-10-13 20:44:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:44:23,865 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:23,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:23,866 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:44:23,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 20:44:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:44:24,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 20:44:24,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:24,133 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-10-13 20:44:24,133 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 4 case distinctions, treesize of input 18 treesize of output 38 [2021-10-13 20:44:24,186 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 20:44:24,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-10-13 20:44:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:44:24,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:44:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 20:44:24,254 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:44:24,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755950964] [2021-10-13 20:44:24,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755950964] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:44:24,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:44:24,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 20:44:24,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066947660] [2021-10-13 20:44:24,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:44:24,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:44:24,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:44:24,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:44:24,256 INFO L87 Difference]: Start difference. First operand 3837 states and 16395 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) [2021-10-13 20:44:24,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:44:24,496 INFO L93 Difference]: Finished difference Result 2823 states and 11562 transitions. [2021-10-13 20:44:24,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 20:44:24,497 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 6 [2021-10-13 20:44:24,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:44:24,511 INFO L225 Difference]: With dead ends: 2823 [2021-10-13 20:44:24,511 INFO L226 Difference]: Without dead ends: 2823 [2021-10-13 20:44:24,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 20:44:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-10-13 20:44:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2823. [2021-10-13 20:44:24,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2711 states have (on average 4.264846919955736) internal successors, (11562), 2822 states have internal predecessors, (11562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:44:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 11562 transitions. [2021-10-13 20:44:24,660 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 11562 transitions. Word has length 6 [2021-10-13 20:44:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:44:24,661 INFO L470 AbstractCegarLoop]: Abstraction has 2823 states and 11562 transitions. [2021-10-13 20:44:24,661 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) [2021-10-13 20:44:24,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 11562 transitions. [2021-10-13 20:44:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 20:44:24,662 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:44:24,662 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:44:24,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 20:44:24,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:44:24,876 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:44:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:44:24,876 INFO L82 PathProgramCache]: Analyzing trace with hash 31474648, now seen corresponding path program 1 times [2021-10-13 20:44:24,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:44:24,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452476048] [2021-10-13 20:44:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:44:24,877 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:44:24,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:44:24,879 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:44:24,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 20:44:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:44:25,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 20:44:25,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:44:25,531 INFO L354 Elim1Store]: treesize reduction 349, result has 18.3 percent of original size [2021-10-13 20:44:25,532 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 6 case distinctions, treesize of input 48 treesize of output 106 [2021-10-13 20:44:25,547 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 109 treesize of output 107 [2021-10-13 20:44:27,996 INFO L354 Elim1Store]: treesize reduction 120, result has 35.5 percent of original size [2021-10-13 20:44:27,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 123 [2021-10-13 20:46:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:46:28,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:46:31,077 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_create_fresh_int_array_~arr~0.base_137 (_ BitVec 32))) (or (not (bvult v_ULTIMATE.start_create_fresh_int_array_~arr~0.base_137 |c_#StackHeapBarrier|)) (and (forall ((v_ULTIMATE.start_create_fresh_int_array_~size_155 (_ BitVec 32))) (bvule (bvadd |c_ULTIMATE.start_main_~#t3~0.offset| (_ bv4 32)) (select (store |c_#length| v_ULTIMATE.start_create_fresh_int_array_~arr~0.base_137 (bvmul v_ULTIMATE.start_create_fresh_int_array_~size_155 (_ bv4 32))) |c_ULTIMATE.start_main_~#t3~0.base|))) (bvule |c_ULTIMATE.start_main_~#t3~0.offset| (bvadd |c_ULTIMATE.start_main_~#t3~0.offset| (_ bv4 32)))))) is different from false [2021-10-13 20:46:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:46:31,081 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:46:31,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452476048] [2021-10-13 20:46:31,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452476048] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:46:31,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:46:31,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 20:46:31,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150965578] [2021-10-13 20:46:31,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 20:46:31,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:46:31,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 20:46:31,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=11, Unknown=2, NotChecked=6, Total=30 [2021-10-13 20:46:31,083 INFO L87 Difference]: Start difference. First operand 2823 states and 11562 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:41,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:46:41,782 INFO L93 Difference]: Finished difference Result 2748 states and 11317 transitions. [2021-10-13 20:46:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 20:46:41,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 20:46:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:46:41,797 INFO L225 Difference]: With dead ends: 2748 [2021-10-13 20:46:41,798 INFO L226 Difference]: Without dead ends: 2748 [2021-10-13 20:46:41,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8314.1ms TimeCoverageRelationStatistics Valid=16, Invalid=16, Unknown=2, NotChecked=8, Total=42 [2021-10-13 20:46:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-10-13 20:46:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2748. [2021-10-13 20:46:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2651 states have (on average 4.268955111278763) internal successors, (11317), 2747 states have internal predecessors, (11317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 11317 transitions. [2021-10-13 20:46:41,894 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 11317 transitions. Word has length 7 [2021-10-13 20:46:41,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:46:41,895 INFO L470 AbstractCegarLoop]: Abstraction has 2748 states and 11317 transitions. [2021-10-13 20:46:41,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:41,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 11317 transitions. [2021-10-13 20:46:41,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 20:46:41,897 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:46:41,897 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:46:41,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 20:46:42,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:46:42,111 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:46:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:46:42,112 INFO L82 PathProgramCache]: Analyzing trace with hash 31474649, now seen corresponding path program 1 times [2021-10-13 20:46:42,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:46:42,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487637568] [2021-10-13 20:46:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:46:42,113 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:46:42,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:46:42,114 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:46:42,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 20:46:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:46:42,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 20:46:42,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:46:42,432 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-10-13 20:46:42,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 63 [2021-10-13 20:46:42,613 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 20:46:42,613 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 33 treesize of output 44 [2021-10-13 20:46:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:46:42,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:46:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:46:42,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:46:42,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487637568] [2021-10-13 20:46:42,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487637568] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:46:42,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:46:42,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 20:46:42,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917158401] [2021-10-13 20:46:42,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:46:42,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:46:42,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:46:42,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:46:42,914 INFO L87 Difference]: Start difference. First operand 2748 states and 11317 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:43,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:46:43,090 INFO L93 Difference]: Finished difference Result 2673 states and 11072 transitions. [2021-10-13 20:46:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:46:43,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 20:46:43,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:46:43,105 INFO L225 Difference]: With dead ends: 2673 [2021-10-13 20:46:43,105 INFO L226 Difference]: Without dead ends: 2666 [2021-10-13 20:46:43,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:46:43,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-10-13 20:46:43,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2666. [2021-10-13 20:46:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2584 states have (on average 4.2743808049535605) internal successors, (11045), 2665 states have internal predecessors, (11045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:43,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 11045 transitions. [2021-10-13 20:46:43,201 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 11045 transitions. Word has length 7 [2021-10-13 20:46:43,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:46:43,201 INFO L470 AbstractCegarLoop]: Abstraction has 2666 states and 11045 transitions. [2021-10-13 20:46:43,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:43,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 11045 transitions. [2021-10-13 20:46:43,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 20:46:43,203 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:46:43,203 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:46:43,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 20:46:43,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:46:43,416 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:46:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:46:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash 31474513, now seen corresponding path program 1 times [2021-10-13 20:46:43,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:46:43,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534334351] [2021-10-13 20:46:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:46:43,419 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:46:43,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:46:43,420 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:46:43,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 20:46:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:46:43,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 20:46:43,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:46:43,601 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 [2021-10-13 20:46:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:46:43,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:46:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:46:43,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:46:43,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534334351] [2021-10-13 20:46:43,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534334351] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:46:43,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:46:43,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 20:46:43,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101527878] [2021-10-13 20:46:43,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:46:43,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:46:43,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:46:43,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:46:43,659 INFO L87 Difference]: Start difference. First operand 2666 states and 11045 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:46:43,923 INFO L93 Difference]: Finished difference Result 1846 states and 7550 transitions. [2021-10-13 20:46:43,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 20:46:43,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 20:46:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:46:43,934 INFO L225 Difference]: With dead ends: 1846 [2021-10-13 20:46:43,934 INFO L226 Difference]: Without dead ends: 1846 [2021-10-13 20:46:43,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 20:46:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-10-13 20:46:43,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1846. [2021-10-13 20:46:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1801 states have (on average 4.19211549139367) internal successors, (7550), 1845 states have internal predecessors, (7550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:44,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 7550 transitions. [2021-10-13 20:46:44,039 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 7550 transitions. Word has length 7 [2021-10-13 20:46:44,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:46:44,039 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 7550 transitions. [2021-10-13 20:46:44,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:44,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 7550 transitions. [2021-10-13 20:46:44,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 20:46:44,043 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:46:44,043 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:46:44,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 20:46:44,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:46:44,251 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:46:44,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:46:44,252 INFO L82 PathProgramCache]: Analyzing trace with hash 31474514, now seen corresponding path program 1 times [2021-10-13 20:46:44,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:46:44,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663054208] [2021-10-13 20:46:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:46:44,253 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:46:44,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:46:44,254 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:46:44,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 20:46:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:46:44,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 20:46:44,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:46:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:46:44,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:46:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:46:44,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:46:44,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663054208] [2021-10-13 20:46:44,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663054208] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:46:44,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:46:44,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 20:46:44,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993568150] [2021-10-13 20:46:44,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 20:46:44,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:46:44,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 20:46:44,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 20:46:44,560 INFO L87 Difference]: Start difference. First operand 1846 states and 7550 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:44,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:46:44,711 INFO L93 Difference]: Finished difference Result 2633 states and 10183 transitions. [2021-10-13 20:46:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 20:46:44,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 20:46:44,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:46:44,728 INFO L225 Difference]: With dead ends: 2633 [2021-10-13 20:46:44,728 INFO L226 Difference]: Without dead ends: 2594 [2021-10-13 20:46:44,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 20:46:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2021-10-13 20:46:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2448. [2021-10-13 20:46:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2398 states have (on average 4.065888240200167) internal successors, (9750), 2447 states have internal predecessors, (9750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 9750 transitions. [2021-10-13 20:46:44,807 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 9750 transitions. Word has length 7 [2021-10-13 20:46:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:46:44,807 INFO L470 AbstractCegarLoop]: Abstraction has 2448 states and 9750 transitions. [2021-10-13 20:46:44,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 9750 transitions. [2021-10-13 20:46:44,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 20:46:44,808 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:46:44,808 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:46:44,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 20:46:45,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:46:45,021 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:46:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:46:45,022 INFO L82 PathProgramCache]: Analyzing trace with hash -166367149, now seen corresponding path program 1 times [2021-10-13 20:46:45,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:46:45,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658479809] [2021-10-13 20:46:45,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:46:45,023 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:46:45,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:46:45,025 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:46:45,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 20:46:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:46:45,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 20:46:45,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:46:45,254 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 [2021-10-13 20:46:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:46:45,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:46:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:46:46,343 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:46:46,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658479809] [2021-10-13 20:46:46,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658479809] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:46:46,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:46:46,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 20:46:46,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448890761] [2021-10-13 20:46:46,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 20:46:46,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:46:46,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 20:46:46,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 20:46:46,345 INFO L87 Difference]: Start difference. First operand 2448 states and 9750 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:46:50,184 INFO L93 Difference]: Finished difference Result 4880 states and 19353 transitions. [2021-10-13 20:46:50,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 20:46:50,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 20:46:50,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:46:50,204 INFO L225 Difference]: With dead ends: 4880 [2021-10-13 20:46:50,204 INFO L226 Difference]: Without dead ends: 4764 [2021-10-13 20:46:50,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2067.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 20:46:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4764 states. [2021-10-13 20:46:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4764 to 3385. [2021-10-13 20:46:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3335 states have (on average 4.150824587706147) internal successors, (13843), 3384 states have internal predecessors, (13843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:50,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 13843 transitions. [2021-10-13 20:46:50,413 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 13843 transitions. Word has length 8 [2021-10-13 20:46:50,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:46:50,413 INFO L470 AbstractCegarLoop]: Abstraction has 3385 states and 13843 transitions. [2021-10-13 20:46:50,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:46:50,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 13843 transitions. [2021-10-13 20:46:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 20:46:50,415 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:46:50,415 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-13 20:46:50,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 20:46:50,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:46:50,640 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:46:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:46:50,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1524749818, now seen corresponding path program 2 times [2021-10-13 20:46:50,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:46:50,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629705481] [2021-10-13 20:46:50,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 20:46:50,642 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:46:50,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:46:50,644 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:46:50,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 20:46:50,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 20:46:50,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:46:50,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 20:46:50,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:46:50,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:46:50,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:46:51,301 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-13 20:46:51,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-13 20:46:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:46:51,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:46:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:46:53,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:46:53,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629705481] [2021-10-13 20:46:53,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629705481] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:46:53,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:46:53,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 20:46:53,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570642064] [2021-10-13 20:46:53,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 20:46:53,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:46:53,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 20:46:53,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-13 20:46:53,579 INFO L87 Difference]: Start difference. First operand 3385 states and 13843 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:47:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:47:14,391 INFO L93 Difference]: Finished difference Result 13126 states and 53294 transitions. [2021-10-13 20:47:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 20:47:14,394 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 20:47:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:47:14,484 INFO L225 Difference]: With dead ends: 13126 [2021-10-13 20:47:14,484 INFO L226 Difference]: Without dead ends: 13126 [2021-10-13 20:47:14,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 6319.0ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-13 20:47:14,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13126 states. [2021-10-13 20:47:14,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13126 to 3402. [2021-10-13 20:47:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3352 states have (on average 4.13991646778043) internal successors, (13877), 3401 states have internal predecessors, (13877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:47:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 13877 transitions. [2021-10-13 20:47:14,812 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 13877 transitions. Word has length 8 [2021-10-13 20:47:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:47:14,812 INFO L470 AbstractCegarLoop]: Abstraction has 3402 states and 13877 transitions. [2021-10-13 20:47:14,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:47:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 13877 transitions. [2021-10-13 20:47:14,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 20:47:14,815 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:47:14,816 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:47:14,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 20:47:15,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:47:15,030 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:47:15,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:47:15,031 INFO L82 PathProgramCache]: Analyzing trace with hash 182395602, now seen corresponding path program 1 times [2021-10-13 20:47:15,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:47:15,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998440231] [2021-10-13 20:47:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:47:15,032 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:47:15,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:47:15,033 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:47:15,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 20:47:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:47:15,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 20:47:15,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:47:15,473 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-10-13 20:47:15,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2021-10-13 20:47:15,698 INFO L354 Elim1Store]: treesize reduction 135, result has 23.3 percent of original size [2021-10-13 20:47:15,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 95 [2021-10-13 20:47:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:47:16,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:47:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:47:16,701 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:47:16,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998440231] [2021-10-13 20:47:16,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998440231] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:47:16,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:47:16,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 20:47:16,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880578987] [2021-10-13 20:47:16,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 20:47:16,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:47:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 20:47:16,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:47:16,704 INFO L87 Difference]: Start difference. First operand 3402 states and 13877 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:47:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:47:16,938 INFO L93 Difference]: Finished difference Result 3191 states and 12970 transitions. [2021-10-13 20:47:16,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 20:47:16,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 20:47:16,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:47:16,958 INFO L225 Difference]: With dead ends: 3191 [2021-10-13 20:47:16,958 INFO L226 Difference]: Without dead ends: 3191 [2021-10-13 20:47:16,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 20:47:16,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2021-10-13 20:47:17,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3191. [2021-10-13 20:47:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3154 states have (on average 4.112238427393786) internal successors, (12970), 3190 states have internal predecessors, (12970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:47:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 12970 transitions. [2021-10-13 20:47:17,109 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 12970 transitions. Word has length 9 [2021-10-13 20:47:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:47:17,109 INFO L470 AbstractCegarLoop]: Abstraction has 3191 states and 12970 transitions. [2021-10-13 20:47:17,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:47:17,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 12970 transitions. [2021-10-13 20:47:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 20:47:17,110 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:47:17,111 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:47:17,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 20:47:17,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:47:17,324 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:47:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:47:17,325 INFO L82 PathProgramCache]: Analyzing trace with hash 182395604, now seen corresponding path program 1 times [2021-10-13 20:47:17,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:47:17,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370557061] [2021-10-13 20:47:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:47:17,327 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:47:17,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:47:17,328 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 20:47:17,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 20:47:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:47:17,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 20:47:17,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:47:17,985 INFO L354 Elim1Store]: treesize reduction 361, result has 15.5 percent of original size [2021-10-13 20:47:17,986 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 6 case distinctions, treesize of input 50 treesize of output 96 [2021-10-13 20:47:17,997 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 100 treesize of output 98 [2021-10-13 20:47:18,531 INFO L354 Elim1Store]: treesize reduction 144, result has 22.6 percent of original size [2021-10-13 20:47:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 87 [2021-10-13 20:47:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:47:48,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:47:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:47:48,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:47:48,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370557061] [2021-10-13 20:47:48,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370557061] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:47:48,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:47:48,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 20:47:48,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011413472] [2021-10-13 20:47:48,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 20:47:48,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:47:48,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 20:47:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=17, Unknown=1, NotChecked=0, Total=30 [2021-10-13 20:47:48,815 INFO L87 Difference]: Start difference. First operand 3191 states and 12970 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-10-13 20:47:57,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:47:57,281 INFO L93 Difference]: Finished difference Result 2980 states and 12063 transitions. [2021-10-13 20:47:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 20:47:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2021-10-13 20:47:57,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:47:57,295 INFO L225 Difference]: With dead ends: 2980 [2021-10-13 20:47:57,295 INFO L226 Difference]: Without dead ends: 2899 [2021-10-13 20:47:57,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4227.3ms TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-10-13 20:47:57,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-10-13 20:47:57,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2899. [2021-10-13 20:47:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2875 states have (on average 4.090782608695652) internal successors, (11761), 2898 states have internal predecessors, (11761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:47:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 11761 transitions. [2021-10-13 20:47:57,394 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 11761 transitions. Word has length 9 [2021-10-13 20:47:57,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:47:57,395 INFO L470 AbstractCegarLoop]: Abstraction has 2899 states and 11761 transitions. [2021-10-13 20:47:57,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-10-13 20:47:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 11761 transitions. [2021-10-13 20:47:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 20:47:57,396 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:47:57,396 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-10-13 20:47:57,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 20:47:57,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 20:47:57,611 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:47:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:47:57,612 INFO L82 PathProgramCache]: Analyzing trace with hash 23743877, now seen corresponding path program 2 times [2021-10-13 20:47:57,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:47:57,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451474766] [2021-10-13 20:47:57,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 20:47:57,613 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:47:57,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:47:57,616 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) [2021-10-13 20:47:57,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 20:47:57,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 20:47:57,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:47:57,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 20:47:57,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:47:57,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:47:57,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:47:58,305 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-13 20:47:58,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 107 [2021-10-13 20:47:58,445 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-10-13 20:47:58,446 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 4 case distinctions, treesize of input 107 treesize of output 126 [2021-10-13 20:47:58,632 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 20:47:58,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 20:47:58,645 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 20:47:58,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-10-13 20:47:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 20:47:58,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:48:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 20:48:01,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:48:01,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451474766] [2021-10-13 20:48:01,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451474766] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:48:01,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:48:01,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 20:48:01,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528254945] [2021-10-13 20:48:01,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 20:48:01,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:48:01,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 20:48:01,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 20:48:01,162 INFO L87 Difference]: Start difference. First operand 2899 states and 11761 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:48:01,620 INFO L93 Difference]: Finished difference Result 2269 states and 9114 transitions. [2021-10-13 20:48:01,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 20:48:01,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 20:48:01,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:48:01,631 INFO L225 Difference]: With dead ends: 2269 [2021-10-13 20:48:01,631 INFO L226 Difference]: Without dead ends: 2225 [2021-10-13 20:48:01,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 227.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 20:48:01,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-10-13 20:48:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1428. [2021-10-13 20:48:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1419 states have (on average 3.871740662438337) internal successors, (5494), 1427 states have internal predecessors, (5494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 5494 transitions. [2021-10-13 20:48:01,670 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 5494 transitions. Word has length 9 [2021-10-13 20:48:01,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:48:01,670 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 5494 transitions. [2021-10-13 20:48:01,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 5494 transitions. [2021-10-13 20:48:01,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 20:48:01,671 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:48:01,671 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 20:48:01,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-13 20:48:01,874 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 [2021-10-13 20:48:01,874 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:48:01,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:48:01,875 INFO L82 PathProgramCache]: Analyzing trace with hash -62653550, now seen corresponding path program 2 times [2021-10-13 20:48:01,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:48:01,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388476542] [2021-10-13 20:48:01,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 20:48:01,877 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:48:01,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:48:01,878 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) [2021-10-13 20:48:01,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 20:48:02,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 20:48:02,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:48:02,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 20:48:02,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:48:02,161 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 [2021-10-13 20:48:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 20:48:02,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:48:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 20:48:03,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:48:03,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388476542] [2021-10-13 20:48:03,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388476542] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 20:48:03,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 20:48:03,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 20:48:03,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190591678] [2021-10-13 20:48:03,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 20:48:03,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:48:03,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 20:48:03,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 20:48:03,339 INFO L87 Difference]: Start difference. First operand 1428 states and 5494 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:03,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:48:03,636 INFO L93 Difference]: Finished difference Result 1112 states and 4206 transitions. [2021-10-13 20:48:03,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 20:48:03,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 20:48:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:48:03,641 INFO L225 Difference]: With dead ends: 1112 [2021-10-13 20:48:03,642 INFO L226 Difference]: Without dead ends: 1048 [2021-10-13 20:48:03,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 20:48:03,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-10-13 20:48:03,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 658. [2021-10-13 20:48:03,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 655 states have (on average 3.6061068702290076) internal successors, (2362), 657 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:03,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2362 transitions. [2021-10-13 20:48:03,656 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2362 transitions. Word has length 11 [2021-10-13 20:48:03,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:48:03,656 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2362 transitions. [2021-10-13 20:48:03,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:48:03,656 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2362 transitions. [2021-10-13 20:48:03,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 20:48:03,657 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:48:03,657 INFO L512 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2021-10-13 20:48:03,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 20:48:03,864 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 [2021-10-13 20:48:03,864 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:48:03,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:48:03,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1172560770, now seen corresponding path program 1 times [2021-10-13 20:48:03,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:48:03,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197527659] [2021-10-13 20:48:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 20:48:03,867 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:48:03,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:48:03,868 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) [2021-10-13 20:48:03,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 20:48:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 20:48:04,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 20:48:04,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:48:04,162 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 [2021-10-13 20:48:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:48:04,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:48:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:48:08,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:48:08,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197527659] [2021-10-13 20:48:08,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197527659] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:48:08,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:48:08,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-13 20:48:08,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514260367] [2021-10-13 20:48:08,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 20:48:08,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:48:08,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 20:48:08,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-10-13 20:48:08,245 INFO L87 Difference]: Start difference. First operand 658 states and 2362 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) [2021-10-13 20:48:17,647 WARN L207 SmtUtils]: Spent 7.03 s on a formula simplification that was a NOOP. DAG size: 113 [2021-10-13 20:48:41,590 WARN L207 SmtUtils]: Spent 5.12 s on a formula simplification that was a NOOP. DAG size: 102 [2021-10-13 20:49:01,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:49:01,687 INFO L93 Difference]: Finished difference Result 8102 states and 31228 transitions. [2021-10-13 20:49:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 20:49:01,693 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 [2021-10-13 20:49:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:49:01,744 INFO L225 Difference]: With dead ends: 8102 [2021-10-13 20:49:01,744 INFO L226 Difference]: Without dead ends: 8102 [2021-10-13 20:49:01,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 29359.8ms TimeCoverageRelationStatistics Valid=339, Invalid=591, Unknown=0, NotChecked=0, Total=930 [2021-10-13 20:49:01,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8102 states. [2021-10-13 20:49:01,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8102 to 680. [2021-10-13 20:49:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 677 states have (on average 3.553914327917282) internal successors, (2406), 679 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:49:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2406 transitions. [2021-10-13 20:49:01,935 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2406 transitions. Word has length 12 [2021-10-13 20:49:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:49:01,937 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 2406 transitions. [2021-10-13 20:49:01,937 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) [2021-10-13 20:49:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2406 transitions. [2021-10-13 20:49:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 20:49:01,956 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:49:01,956 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-13 20:49:01,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-10-13 20:49:02,172 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 [2021-10-13 20:49:02,173 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:49:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:49:02,174 INFO L82 PathProgramCache]: Analyzing trace with hash -905847302, now seen corresponding path program 3 times [2021-10-13 20:49:02,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:49:02,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243627908] [2021-10-13 20:49:02,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 20:49:02,175 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:49:02,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:49:02,176 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) [2021-10-13 20:49:02,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 20:49:02,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 20:49:02,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:49:02,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 20:49:02,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:49:02,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:49:02,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 20:49:03,141 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-13 20:49:03,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-13 20:49:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:49:04,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:49:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:49:10,153 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:49:10,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243627908] [2021-10-13 20:49:10,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243627908] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:49:10,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:49:10,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 20:49:10,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109352625] [2021-10-13 20:49:10,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 20:49:10,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:49:10,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 20:49:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-13 20:49:10,156 INFO L87 Difference]: Start difference. First operand 680 states and 2406 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:49:25,474 WARN L207 SmtUtils]: Spent 9.95 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-13 20:49:34,016 WARN L207 SmtUtils]: Spent 7.35 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-13 20:50:10,733 WARN L207 SmtUtils]: Spent 7.74 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-13 20:50:17,998 WARN L207 SmtUtils]: Spent 5.89 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-13 20:50:43,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 20:50:43,163 INFO L93 Difference]: Finished difference Result 7250 states and 27880 transitions. [2021-10-13 20:50:43,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 20:50:43,166 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 20:50:43,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 20:50:43,190 INFO L225 Difference]: With dead ends: 7250 [2021-10-13 20:50:43,190 INFO L226 Difference]: Without dead ends: 7250 [2021-10-13 20:50:43,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 60514.2ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 20:50:43,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7250 states. [2021-10-13 20:50:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7250 to 696. [2021-10-13 20:50:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 693 states have (on average 3.518037518037518) internal successors, (2438), 695 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:50:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 2438 transitions. [2021-10-13 20:50:43,251 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 2438 transitions. Word has length 16 [2021-10-13 20:50:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 20:50:43,251 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 2438 transitions. [2021-10-13 20:50:43,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:50:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 2438 transitions. [2021-10-13 20:50:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 20:50:43,254 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 20:50:43,254 INFO L512 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2021-10-13 20:50:43,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 20:50:43,461 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 [2021-10-13 20:50:43,462 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 38 more)] === [2021-10-13 20:50:43,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 20:50:43,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1562017855, now seen corresponding path program 2 times [2021-10-13 20:50:43,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 20:50:43,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6491540] [2021-10-13 20:50:43,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 20:50:43,466 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 20:50:43,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 20:50:43,467 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) [2021-10-13 20:50:43,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 20:50:43,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 20:50:43,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 20:50:43,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 20:50:43,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 20:50:43,892 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 [2021-10-13 20:50:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:50:45,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 20:50:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 20:50:59,520 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 20:50:59,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6491540] [2021-10-13 20:50:59,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6491540] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 20:50:59,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 20:50:59,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2021-10-13 20:50:59,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611179677] [2021-10-13 20:50:59,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-13 20:50:59,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 20:50:59,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-13 20:50:59,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1366, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 20:50:59,523 INFO L87 Difference]: Start difference. First operand 696 states and 2438 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 20:51:40,047 WARN L207 SmtUtils]: Spent 27.31 s on a formula simplification that was a NOOP. DAG size: 232 [2021-10-13 20:52:50,421 WARN L207 SmtUtils]: Spent 28.23 s on a formula simplification that was a NOOP. DAG size: 222 [2021-10-13 20:53:15,884 WARN L207 SmtUtils]: Spent 23.33 s on a formula simplification that was a NOOP. DAG size: 211 [2021-10-13 20:53:34,999 WARN L207 SmtUtils]: Spent 16.68 s on a formula simplification that was a NOOP. DAG size: 200 [2021-10-13 20:53:56,316 WARN L207 SmtUtils]: Spent 19.26 s on a formula simplification that was a NOOP. DAG size: 189 [2021-10-13 20:54:13,134 WARN L207 SmtUtils]: Spent 14.85 s on a formula simplification that was a NOOP. DAG size: 179 [2021-10-13 20:54:27,385 WARN L207 SmtUtils]: Spent 12.03 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-13 20:54:41,217 WARN L207 SmtUtils]: Spent 11.61 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-13 20:54:50,279 WARN L207 SmtUtils]: Spent 6.89 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-13 20:54:58,351 WARN L207 SmtUtils]: Spent 5.72 s on a formula simplification that was a NOOP. DAG size: 136 Received shutdown request... [2021-10-13 20:55:00,050 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 20:55:00,050 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 20:55:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 20:55:00,063 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 20:55:00,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 20:55:00,264 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 [2021-10-13 20:55:00,265 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. [2021-10-13 20:55:00,268 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 20:55:00,268 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 20:55:00,268 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 20:55:00,268 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 20:55:00,268 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-13 20:55:00,268 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-13 20:55:00,269 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 20:55:00,269 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 20:55:00,269 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 20:55:00,269 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 20:55:00,269 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 20:55:00,269 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 20:55:00,269 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 20:55:00,269 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 20:55:00,270 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 20:55:00,270 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 20:55:00,270 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 20:55:00,270 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 20:55:00,270 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 20:55:00,270 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 20:55:00,270 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 20:55:00,270 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-13 20:55:00,270 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-13 20:55:00,271 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-13 20:55:00,271 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-13 20:55:00,271 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 20:55:00,271 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 20:55:00,271 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 20:55:00,271 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 20:55:00,271 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-13 20:55:00,272 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-13 20:55:00,272 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err0REQUIRES_VIOLATION [2021-10-13 20:55:00,272 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err1REQUIRES_VIOLATION [2021-10-13 20:55:00,272 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 20:55:00,272 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 20:55:00,272 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 20:55:00,272 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 20:55:00,272 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-13 20:55:00,273 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-13 20:55:00,273 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err0REQUIRES_VIOLATION [2021-10-13 20:55:00,273 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err1REQUIRES_VIOLATION [2021-10-13 20:55:00,281 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 20:55:00,281 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 20:55:00,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:55:00 BasicIcfg [2021-10-13 20:55:00,283 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 20:55:00,284 INFO L168 Benchmark]: Toolchain (without parser) took 832523.54 ms. Allocated memory was 159.4 MB in the beginning and 351.3 MB in the end (delta: 191.9 MB). Free memory was 134.9 MB in the beginning and 110.0 MB in the end (delta: 24.9 MB). Peak memory consumption was 218.3 MB. Max. memory is 8.0 GB. [2021-10-13 20:55:00,284 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 159.4 MB. Free memory is still 130.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 20:55:00,285 INFO L168 Benchmark]: CACSL2BoogieTranslator took 571.66 ms. Allocated memory is still 159.4 MB. Free memory was 134.7 MB in the beginning and 119.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-10-13 20:55:00,285 INFO L168 Benchmark]: Boogie Procedure Inliner took 104.33 ms. Allocated memory is still 159.4 MB. Free memory was 119.9 MB in the beginning and 117.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 20:55:00,285 INFO L168 Benchmark]: Boogie Preprocessor took 90.72 ms. Allocated memory is still 159.4 MB. Free memory was 117.3 MB in the beginning and 115.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 20:55:00,286 INFO L168 Benchmark]: RCFGBuilder took 2252.37 ms. Allocated memory is still 159.4 MB. Free memory was 115.0 MB in the beginning and 96.9 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. [2021-10-13 20:55:00,286 INFO L168 Benchmark]: TraceAbstraction took 829488.26 ms. Allocated memory was 159.4 MB in the beginning and 351.3 MB in the end (delta: 191.9 MB). Free memory was 96.4 MB in the beginning and 110.0 MB in the end (delta: -13.7 MB). Peak memory consumption was 179.3 MB. Max. memory is 8.0 GB. [2021-10-13 20:55:00,288 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 159.4 MB. Free memory is still 130.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 571.66 ms. Allocated memory is still 159.4 MB. Free memory was 134.7 MB in the beginning and 119.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 104.33 ms. Allocated memory is still 159.4 MB. Free memory was 119.9 MB in the beginning and 117.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 90.72 ms. Allocated memory is still 159.4 MB. Free memory was 117.3 MB in the beginning and 115.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 2252.37 ms. Allocated memory is still 159.4 MB. Free memory was 115.0 MB in the beginning and 96.9 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 829488.26 ms. Allocated memory was 159.4 MB in the beginning and 351.3 MB in the end (delta: 191.9 MB). Free memory was 96.4 MB in the beginning and 110.0 MB in the end (delta: -13.7 MB). Peak memory consumption was 179.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 39859.7ms, 236 PlacesBefore, 74 PlacesAfterwards, 242 TransitionsBefore, 67 TransitionsAfterwards, 2972 CoEnabledTransitionPairs, 7 FixpointIterations, 146 TrivialSequentialCompositions, 59 ConcurrentSequentialCompositions, 24 TrivialYvCompositions, 8 ConcurrentYvCompositions, 13 ChoiceCompositions, 250 TotalNumberOfCompositions, 6663 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4558, positive: 4432, positive conditional: 0, positive unconditional: 4432, negative: 126, negative conditional: 0, negative unconditional: 126, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1903, positive: 1870, positive conditional: 0, positive unconditional: 1870, negative: 33, negative conditional: 0, negative unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1903, positive: 1860, positive conditional: 0, positive unconditional: 1860, negative: 43, negative conditional: 0, negative unconditional: 43, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 43, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 33, negative conditional: 0, negative unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 3888, positive: 1843, positive conditional: 0, positive unconditional: 1843, negative: 2044, negative conditional: 0, negative unconditional: 2044, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4558, positive: 2562, positive conditional: 0, positive unconditional: 2562, negative: 93, negative conditional: 0, negative unconditional: 93, unknown: 1903, unknown conditional: 0, unknown unconditional: 1903] , Statistics on independence cache: Total cache size (in pairs): 294, Positive cache size: 283, Positive conditional cache size: 0, Positive unconditional cache size: 283, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11 - 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: 139]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 139]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 139]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 139]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 118]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 118]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 119]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 119]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 122]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 122]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 123]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 123]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 124]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 124]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 125]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 125]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 128]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 119]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 118]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (696states) and FLOYD_HOARE automaton (currently 33 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 262 locations, 42 error locations. Started 1 CEGAR loops. OverallTime: 829265.7ms, OverallIterations: 23, TraceHistogramMax: 20, EmptinessCheckTime: 68.2ms, AutomataDifference: 482068.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40137.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1501 SDtfs, 19185 SDslu, 13502 SDs, 0 SdLazy, 13986 SolverSat, 1384 SolverUnsat, 61 SolverUnknown, 0 SolverNotchecked, 186124.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 364 GetRequests, 120 SyntacticMatches, 12 SemanticMatches, 231 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 324191.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3837occurred in iteration=9, InterpolantAutomatonStates: 164, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3755.6ms AutomataMinimizationTime, 22 MinimizatonAttempts, 46988 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 260.4ms SsaConstructionTime, 1699.3ms SatisfiabilityAnalysisTime, 293516.3ms InterpolantComputationTime, 174 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 302 ConstructedInterpolants, 78 QuantifiedInterpolants, 9734 SizeOfPredicates, 179 NumberOfNonLiveVariables, 2016 ConjunctsInSsa, 260 ConjunctsInUnsatCore, 46 InterpolantComputations, 32 PerfectInterpolantSequences, 42/814 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