/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-three-array-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 18:10:28,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 18:10:28,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 18:10:28,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-08 18:10:28,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-08 18:10:28,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-08 18:10:28,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-08 18:10:28,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-08 18:10:28,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-08 18:10:28,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-08 18:10:28,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-08 18:10:28,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-08 18:10:28,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-08 18:10:28,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-08 18:10:28,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-08 18:10:29,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-08 18:10:29,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-08 18:10:29,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-08 18:10:29,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-08 18:10:29,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-08 18:10:29,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-08 18:10:29,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-08 18:10:29,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-08 18:10:29,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-08 18:10:29,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-08 18:10:29,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-08 18:10:29,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-08 18:10:29,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-08 18:10:29,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-08 18:10:29,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-08 18:10:29,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-08 18:10:29,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-08 18:10:29,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-08 18:10:29,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 18:10:29,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 18:10:29,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 18:10:29,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-08 18:10:29,141 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 18:10:29,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 18:10:29,143 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 18:10:29,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 18:10:29,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 18:10:29,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 18:10:29,147 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 18:10:29,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 18:10:29,148 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 18:10:29,148 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-08 18:10:29,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 18:10:29,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 18:10:29,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 18:10:29,150 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-08 18:10:29,150 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-08 18:10:29,151 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-08 18:10:29,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 18:10:29,151 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-08 18:10:29,151 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-08 18:10:29,152 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-08 18:10:29,152 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 18:10:29,152 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 18:10:29,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 18:10:29,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 18:10:29,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 18:10:29,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 18:10:29,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 18:10:29,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 18:10:29,154 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-08 18:10:29,154 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-08 18:10:29,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 18:10:29,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-08 18:10:29,155 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-08 18:10:29,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 18:10:29,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 18:10:29,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 18:10:29,622 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 18:10:29,622 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 18:10:29,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2021-10-08 18:10:29,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc35f3319/b7c0ef1b1b7245bbb819f489b2436c3d/FLAG144eaa5ad [2021-10-08 18:10:30,410 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 18:10:30,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2021-10-08 18:10:30,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc35f3319/b7c0ef1b1b7245bbb819f489b2436c3d/FLAG144eaa5ad [2021-10-08 18:10:30,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc35f3319/b7c0ef1b1b7245bbb819f489b2436c3d [2021-10-08 18:10:30,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 18:10:30,768 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-08 18:10:30,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 18:10:30,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 18:10:30,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 18:10:30,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 06:10:30" (1/1) ... [2021-10-08 18:10:30,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634eb3ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:10:30, skipping insertion in model container [2021-10-08 18:10:30,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 06:10:30" (1/1) ... [2021-10-08 18:10:30,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 18:10:30,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 18:10:31,030 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-three-array-sum.wvr.c[2537,2550] [2021-10-08 18:10:31,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 18:10:31,056 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-08 18:10:31,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 18:10:31,079 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-three-array-sum.wvr.c[2537,2550] [2021-10-08 18:10:31,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 18:10:31,098 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 18:10:31,131 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-three-array-sum.wvr.c[2537,2550] [2021-10-08 18:10:31,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 18:10:31,155 INFO L208 MainTranslator]: Completed translation [2021-10-08 18:10:31,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:10:31 WrapperNode [2021-10-08 18:10:31,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 18:10:31,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 18:10:31,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 18:10:31,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 18:10:31,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:10:31" (1/1) ... [2021-10-08 18:10:31,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:10:31" (1/1) ... [2021-10-08 18:10:31,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 18:10:31,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 18:10:31,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 18:10:31,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 18:10:31,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:10:31" (1/1) ... [2021-10-08 18:10:31,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:10:31" (1/1) ... [2021-10-08 18:10:31,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:10:31" (1/1) ... [2021-10-08 18:10:31,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:10:31" (1/1) ... [2021-10-08 18:10:31,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:10:31" (1/1) ... [2021-10-08 18:10:31,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:10:31" (1/1) ... [2021-10-08 18:10:31,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:10:31" (1/1) ... [2021-10-08 18:10:31,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 18:10:31,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 18:10:31,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 18:10:31,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 18:10:31,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:10:31" (1/1) ... [2021-10-08 18:10:31,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 18:10:31,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 18:10:31,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-08 18:10:31,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-08 18:10:31,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-08 18:10:31,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 18:10:31,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-08 18:10:31,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 18:10:31,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 18:10:31,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 18:10:31,436 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 18:10:31,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-08 18:10:31,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-08 18:10:31,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 18:10:31,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 18:10:31,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-08 18:10:31,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 18:10:31,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 18:10:31,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 18:10:31,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-08 18:10:31,442 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 18:10:32,815 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 18:10:32,815 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-08 18:10:32,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 06:10:32 BoogieIcfgContainer [2021-10-08 18:10:32,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 18:10:32,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 18:10:32,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 18:10:32,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 18:10:32,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 06:10:30" (1/3) ... [2021-10-08 18:10:32,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21dad572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 06:10:32, skipping insertion in model container [2021-10-08 18:10:32,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:10:31" (2/3) ... [2021-10-08 18:10:32,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21dad572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 06:10:32, skipping insertion in model container [2021-10-08 18:10:32,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 06:10:32" (3/3) ... [2021-10-08 18:10:32,827 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2021-10-08 18:10:32,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 18:10:32,834 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2021-10-08 18:10:32,834 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 18:10:32,883 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,884 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,884 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,884 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,885 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,885 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,886 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,887 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,887 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,887 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,887 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,887 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,888 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,888 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,888 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,890 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,890 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,890 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,891 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,891 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,892 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,892 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,893 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,893 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,893 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,894 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,894 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,895 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,896 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,896 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,896 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,896 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,896 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,897 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,897 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,897 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,897 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,897 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,898 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,898 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,899 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,900 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,901 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,901 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,901 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,901 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,901 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,902 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,902 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,902 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,903 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,903 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,903 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,903 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,904 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,904 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,905 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,905 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,905 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,905 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,906 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,907 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,907 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,907 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,907 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,908 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,908 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,908 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,908 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,909 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,909 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,909 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,910 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,910 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,910 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,911 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,911 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,911 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,912 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,912 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,912 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,912 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,913 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,913 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,913 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,913 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,913 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,914 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,918 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,919 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,922 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,926 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,927 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,927 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,927 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,927 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,928 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,928 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,928 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,928 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,928 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,928 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,929 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,929 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,929 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,929 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,930 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,930 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,930 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,930 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,930 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,930 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,931 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,931 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,934 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,934 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,934 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,934 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,935 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,935 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,935 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,935 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,941 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,941 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,941 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,942 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,942 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,942 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,944 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,945 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,945 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,945 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,945 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,948 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,948 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,948 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,948 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,949 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,949 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:10:32,955 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-08 18:10:33,031 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 18:10:33,040 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-08 18:10:33,040 INFO L340 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2021-10-08 18:10:33,062 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 18:10:33,076 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 238 transitions, 500 flow [2021-10-08 18:10:33,080 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 238 transitions, 500 flow [2021-10-08 18:10:33,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 228 places, 238 transitions, 500 flow [2021-10-08 18:10:33,177 INFO L129 PetriNetUnfolder]: 20/235 cut-off events. [2021-10-08 18:10:33,177 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-08 18:10:33,187 INFO L84 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 235 events. 20/235 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 293 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 185. Up to 3 conditions per place. [2021-10-08 18:10:33,198 INFO L116 LiptonReduction]: Number of co-enabled transitions 3582 [2021-10-08 18:11:17,330 INFO L131 LiptonReduction]: Checked pairs total: 6092 [2021-10-08 18:11:17,331 INFO L133 LiptonReduction]: Total number of compositions: 256 [2021-10-08 18:11:17,342 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 69 places, 66 transitions, 156 flow [2021-10-08 18:11:17,461 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2304 states, 1852 states have (on average 4.563174946004319) internal successors, (8451), 2303 states have internal predecessors, (8451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:11:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 2304 states, 1852 states have (on average 4.563174946004319) internal successors, (8451), 2303 states have internal predecessors, (8451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:11:17,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 18:11:17,483 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:11:17,484 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 18:11:17,485 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:11:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:11:17,491 INFO L82 PathProgramCache]: Analyzing trace with hash 29310, now seen corresponding path program 1 times [2021-10-08 18:11:17,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:11:17,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204891714] [2021-10-08 18:11:17,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:11:17,512 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:11:17,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:11:17,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:11:17,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-08 18:11:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:11:17,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 18:11:17,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:11:17,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:11:17,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:11:18,281 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:11:18,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 18:11:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:11:18,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:11:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:11:18,523 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:11:18,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204891714] [2021-10-08 18:11:18,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204891714] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:11:18,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:11:18,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:11:18,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957769733] [2021-10-08 18:11:18,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:11:18,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:11:18,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:11:18,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:11:18,562 INFO L87 Difference]: Start difference. First operand has 2304 states, 1852 states have (on average 4.563174946004319) internal successors, (8451), 2303 states have internal predecessors, (8451), 0 states have call successors, (0), 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) [2021-10-08 18:11:19,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:11:19,941 INFO L93 Difference]: Finished difference Result 4608 states and 16907 transitions. [2021-10-08 18:11:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:11:19,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 18:11:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:11:20,029 INFO L225 Difference]: With dead ends: 4608 [2021-10-08 18:11:20,029 INFO L226 Difference]: Without dead ends: 4608 [2021-10-08 18:11:20,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:11:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4608 states. [2021-10-08 18:11:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4608 to 2309. [2021-10-08 18:11:20,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 1858 states have (on average 4.559741657696448) internal successors, (8472), 2308 states have internal predecessors, (8472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:11:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 8472 transitions. [2021-10-08 18:11:20,266 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 8472 transitions. Word has length 2 [2021-10-08 18:11:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:11:20,267 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 8472 transitions. [2021-10-08 18:11:20,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:11:20,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 8472 transitions. [2021-10-08 18:11:20,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 18:11:20,268 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:11:20,268 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 18:11:20,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-08 18:11:20,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:11:20,470 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:11:20,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:11:20,471 INFO L82 PathProgramCache]: Analyzing trace with hash 29312, now seen corresponding path program 1 times [2021-10-08 18:11:20,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:11:20,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965693376] [2021-10-08 18:11:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:11:20,473 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:11:20,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:11:20,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:11:20,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-08 18:11:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:11:20,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 18:11:20,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:11:20,686 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-08 18:11:20,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-08 18:11:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:11:20,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:11:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:11:20,728 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:11:20,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965693376] [2021-10-08 18:11:20,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965693376] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:11:20,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:11:20,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 18:11:20,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059393887] [2021-10-08 18:11:20,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 18:11:20,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:11:20,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 18:11:20,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:11:20,732 INFO L87 Difference]: Start difference. First operand 2309 states and 8472 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) [2021-10-08 18:11:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:11:21,046 INFO L93 Difference]: Finished difference Result 2306 states and 8463 transitions. [2021-10-08 18:11:21,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:11:21,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 18:11:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:11:21,075 INFO L225 Difference]: With dead ends: 2306 [2021-10-08 18:11:21,075 INFO L226 Difference]: Without dead ends: 2306 [2021-10-08 18:11:21,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:11:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-10-08 18:11:21,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2306. [2021-10-08 18:11:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 1858 states have (on average 4.554897739504844) internal successors, (8463), 2305 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:11:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 8463 transitions. [2021-10-08 18:11:21,182 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 8463 transitions. Word has length 2 [2021-10-08 18:11:21,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:11:21,182 INFO L470 AbstractCegarLoop]: Abstraction has 2306 states and 8463 transitions. [2021-10-08 18:11:21,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:11:21,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 8463 transitions. [2021-10-08 18:11:21,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 18:11:21,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:11:21,183 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-08 18:11:21,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-08 18:11:21,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:11:21,396 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:11:21,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:11:21,398 INFO L82 PathProgramCache]: Analyzing trace with hash 28327102, now seen corresponding path program 1 times [2021-10-08 18:11:21,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:11:21,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980831241] [2021-10-08 18:11:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:11:21,400 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:11:21,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:11:21,401 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:11:21,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-08 18:11:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:11:21,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 18:11:21,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:11:21,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:11:21,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:11:21,810 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:11:21,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 18:11:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:11:22,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:11:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:11:22,676 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:11:22,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980831241] [2021-10-08 18:11:22,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980831241] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:11:22,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:11:22,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 18:11:22,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587386623] [2021-10-08 18:11:22,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:11:22,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:11:22,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:11:22,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:11:22,680 INFO L87 Difference]: Start difference. First operand 2306 states and 8463 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:11:35,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:11:35,664 INFO L93 Difference]: Finished difference Result 13784 states and 50671 transitions. [2021-10-08 18:11:35,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 18:11:35,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-08 18:11:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:11:35,798 INFO L225 Difference]: With dead ends: 13784 [2021-10-08 18:11:35,798 INFO L226 Difference]: Without dead ends: 13784 [2021-10-08 18:11:35,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1009.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-08 18:11:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13784 states. [2021-10-08 18:11:36,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13784 to 2318. [2021-10-08 18:11:36,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 1870 states have (on average 4.54331550802139) internal successors, (8496), 2317 states have internal predecessors, (8496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:11:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 8496 transitions. [2021-10-08 18:11:36,174 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 8496 transitions. Word has length 4 [2021-10-08 18:11:36,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:11:36,174 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 8496 transitions. [2021-10-08 18:11:36,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:11:36,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 8496 transitions. [2021-10-08 18:11:36,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 18:11:36,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:11:36,176 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 18:11:36,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-08 18:11:36,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:11:36,389 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:11:36,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:11:36,391 INFO L82 PathProgramCache]: Analyzing trace with hash 28380779, now seen corresponding path program 1 times [2021-10-08 18:11:36,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:11:36,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067867864] [2021-10-08 18:11:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:11:36,392 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:11:36,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:11:36,394 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:11:36,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-08 18:11:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:11:36,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-08 18:11:36,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:11:36,911 INFO L354 Elim1Store]: treesize reduction 233, result has 21.3 percent of original size [2021-10-08 18:11:36,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 113 [2021-10-08 18:11:37,029 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-10-08 18:11:37,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 126 [2021-10-08 18:11:39,279 INFO L354 Elim1Store]: treesize reduction 112, result has 15.8 percent of original size [2021-10-08 18:11:39,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 115 [2021-10-08 18:11:39,439 INFO L354 Elim1Store]: treesize reduction 112, result has 28.7 percent of original size [2021-10-08 18:11:39,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 103 treesize of output 136 [2021-10-08 18:11:43,836 INFO L354 Elim1Store]: treesize reduction 160, result has 14.0 percent of original size [2021-10-08 18:11:43,837 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 162 treesize of output 176 [2021-10-08 18:11:43,966 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-10-08 18:11:43,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 161 treesize of output 165 [2021-10-08 18:11:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:11:47,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:11:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:11:48,496 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:11:48,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067867864] [2021-10-08 18:11:48,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067867864] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:11:48,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:11:48,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-08 18:11:48,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115952237] [2021-10-08 18:11:48,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:11:48,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:11:48,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:11:48,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:11:48,499 INFO L87 Difference]: Start difference. First operand 2318 states and 8496 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:11:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:11:54,138 INFO L93 Difference]: Finished difference Result 1452 states and 4882 transitions. [2021-10-08 18:11:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 18:11:54,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-08 18:11:54,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:11:54,159 INFO L225 Difference]: With dead ends: 1452 [2021-10-08 18:11:54,159 INFO L226 Difference]: Without dead ends: 1452 [2021-10-08 18:11:54,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1796.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-08 18:11:54,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-10-08 18:11:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1452. [2021-10-08 18:11:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1216 states have (on average 4.014802631578948) internal successors, (4882), 1451 states have internal predecessors, (4882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:11:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4882 transitions. [2021-10-08 18:11:54,214 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4882 transitions. Word has length 4 [2021-10-08 18:11:54,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:11:54,215 INFO L470 AbstractCegarLoop]: Abstraction has 1452 states and 4882 transitions. [2021-10-08 18:11:54,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:11:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4882 transitions. [2021-10-08 18:11:54,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 18:11:54,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:11:54,216 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-08 18:11:54,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-08 18:11:54,428 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 [2021-10-08 18:11:54,429 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:11:54,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:11:54,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1504147116, now seen corresponding path program 1 times [2021-10-08 18:11:54,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:11:54,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260750016] [2021-10-08 18:11:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:11:54,432 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:11:54,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:11:54,433 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) [2021-10-08 18:11:54,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-08 18:11:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:11:54,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 18:11:54,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:11:54,861 INFO L354 Elim1Store]: treesize reduction 233, result has 21.3 percent of original size [2021-10-08 18:11:54,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 88 [2021-10-08 18:11:54,867 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 90 treesize of output 88 [2021-10-08 18:11:56,132 INFO L354 Elim1Store]: treesize reduction 84, result has 36.8 percent of original size [2021-10-08 18:11:56,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 92 [2021-10-08 18:12:05,566 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:12:05,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260750016] [2021-10-08 18:12:05,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 18:12:05,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [283307770] [2021-10-08 18:12:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:12:05,567 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-08 18:12:05,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-08 18:12:05,569 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-08 18:12:05,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-08 18:12:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:12:05,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 18:12:05,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:12:06,125 INFO L354 Elim1Store]: treesize reduction 233, result has 21.3 percent of original size [2021-10-08 18:12:06,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 88 [2021-10-08 18:12:06,132 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 90 treesize of output 88 [2021-10-08 18:12:07,365 INFO L354 Elim1Store]: treesize reduction 84, result has 36.8 percent of original size [2021-10-08 18:12:07,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 92 [2021-10-08 18:12:18,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 18:12:18,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337432377] [2021-10-08 18:12:18,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:12:18,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 18:12:18,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 18:12:18,285 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 18:12:18,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-08 18:12:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:12:18,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 18:12:18,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:12:18,681 INFO L354 Elim1Store]: treesize reduction 241, result has 18.6 percent of original size [2021-10-08 18:12:18,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 108 [2021-10-08 18:12:18,766 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-10-08 18:12:18,766 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 5 case distinctions, treesize of input 113 treesize of output 123 [2021-10-08 18:12:19,247 INFO L354 Elim1Store]: treesize reduction 112, result has 15.8 percent of original size [2021-10-08 18:12:19,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 111 [2021-10-08 18:12:19,387 INFO L354 Elim1Store]: treesize reduction 108, result has 31.2 percent of original size [2021-10-08 18:12:19,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 99 treesize of output 136 [2021-10-08 18:12:20,143 INFO L354 Elim1Store]: treesize reduction 160, result has 14.0 percent of original size [2021-10-08 18:12:20,143 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 154 treesize of output 168 [2021-10-08 18:12:20,251 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-10-08 18:12:20,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 153 treesize of output 161 [2021-10-08 18:12:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:28,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:12:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:33,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337432377] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:12:33,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:12:33,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-08 18:12:33,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60252695] [2021-10-08 18:12:33,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:12:33,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:12:33,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:12:33,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=70, Unknown=7, NotChecked=0, Total=110 [2021-10-08 18:12:33,002 INFO L87 Difference]: Start difference. First operand 1452 states and 4882 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) [2021-10-08 18:12:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:12:41,590 INFO L93 Difference]: Finished difference Result 1328 states and 4508 transitions. [2021-10-08 18:12:41,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:12:41,592 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 [2021-10-08 18:12:41,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:12:41,610 INFO L225 Difference]: With dead ends: 1328 [2021-10-08 18:12:41,610 INFO L226 Difference]: Without dead ends: 1328 [2021-10-08 18:12:41,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 21068.6ms TimeCoverageRelationStatistics Valid=41, Invalid=84, Unknown=7, NotChecked=0, Total=132 [2021-10-08 18:12:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-10-08 18:12:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1328. [2021-10-08 18:12:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1144 states have (on average 3.9405594405594404) internal successors, (4508), 1327 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4508 transitions. [2021-10-08 18:12:41,679 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4508 transitions. Word has length 6 [2021-10-08 18:12:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:12:41,679 INFO L470 AbstractCegarLoop]: Abstraction has 1328 states and 4508 transitions. [2021-10-08 18:12:41,680 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) [2021-10-08 18:12:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4508 transitions. [2021-10-08 18:12:41,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 18:12:41,681 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:12:41,681 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:12:41,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-08 18:12:41,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-08 18:12:42,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-08 18:12:42,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:12:42,287 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:12:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:12:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash -616087497, now seen corresponding path program 1 times [2021-10-08 18:12:42,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:12:42,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133885959] [2021-10-08 18:12:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:12:42,291 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:12:42,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:12:42,292 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:12:42,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-08 18:12:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:12:42,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 18:12:42,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:12:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:42,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:12:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:42,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:12:42,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133885959] [2021-10-08 18:12:42,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133885959] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:12:42,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:12:42,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-08 18:12:42,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96043816] [2021-10-08 18:12:42,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:12:42,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:12:42,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:12:42,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:12:42,561 INFO L87 Difference]: Start difference. First operand 1328 states and 4508 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:43,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:12:43,635 INFO L93 Difference]: Finished difference Result 1903 states and 6285 transitions. [2021-10-08 18:12:43,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 18:12:43,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-08 18:12:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:12:43,647 INFO L225 Difference]: With dead ends: 1903 [2021-10-08 18:12:43,647 INFO L226 Difference]: Without dead ends: 1903 [2021-10-08 18:12:43,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-08 18:12:43,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2021-10-08 18:12:43,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1623. [2021-10-08 18:12:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1439 states have (on average 3.8408617095205004) internal successors, (5527), 1622 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:43,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5527 transitions. [2021-10-08 18:12:43,745 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5527 transitions. Word has length 7 [2021-10-08 18:12:43,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:12:43,745 INFO L470 AbstractCegarLoop]: Abstraction has 1623 states and 5527 transitions. [2021-10-08 18:12:43,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:12:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5527 transitions. [2021-10-08 18:12:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 18:12:43,747 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:12:43,748 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-08 18:12:43,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-08 18:12:43,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:12:43,956 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:12:43,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:12:43,957 INFO L82 PathProgramCache]: Analyzing trace with hash 181870910, now seen corresponding path program 2 times [2021-10-08 18:12:43,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:12:43,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287463078] [2021-10-08 18:12:43,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:12:43,958 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:12:43,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:12:43,960 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:12:43,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-08 18:12:44,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 18:12:44,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:12:44,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 18:12:44,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:12:44,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:12:44,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:12:44,432 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:12:44,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 18:12:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:44,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:12:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:12:46,822 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:12:46,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287463078] [2021-10-08 18:12:46,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287463078] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:12:46,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:12:46,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 18:12:46,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848001571] [2021-10-08 18:12:46,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 18:12:46,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:12:46,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 18:12:46,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-08 18:12:46,826 INFO L87 Difference]: Start difference. First operand 1623 states and 5527 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:25,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:13:25,177 INFO L93 Difference]: Finished difference Result 12342 states and 42001 transitions. [2021-10-08 18:13:25,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-08 18:13:25,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-08 18:13:25,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:13:25,221 INFO L225 Difference]: With dead ends: 12342 [2021-10-08 18:13:25,222 INFO L226 Difference]: Without dead ends: 12342 [2021-10-08 18:13:25,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 6502.6ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-08 18:13:25,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12342 states. [2021-10-08 18:13:25,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12342 to 1637. [2021-10-08 18:13:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1453 states have (on average 3.823124569855471) internal successors, (5555), 1636 states have internal predecessors, (5555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5555 transitions. [2021-10-08 18:13:25,487 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5555 transitions. Word has length 8 [2021-10-08 18:13:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:13:25,488 INFO L470 AbstractCegarLoop]: Abstraction has 1637 states and 5555 transitions. [2021-10-08 18:13:25,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5555 transitions. [2021-10-08 18:13:25,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 18:13:25,489 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:13:25,489 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:13:25,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-08 18:13:25,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:13:25,703 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:13:25,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:13:25,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1918578844, now seen corresponding path program 1 times [2021-10-08 18:13:25,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:13:25,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321443107] [2021-10-08 18:13:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:13:25,705 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:13:25,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:13:25,707 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:13:25,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-08 18:13:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:13:25,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 18:13:25,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:13:26,232 INFO L354 Elim1Store]: treesize reduction 241, result has 18.6 percent of original size [2021-10-08 18:13:26,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 78 [2021-10-08 18:13:26,239 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 81 treesize of output 79 [2021-10-08 18:13:28,566 INFO L354 Elim1Store]: treesize reduction 100, result has 24.8 percent of original size [2021-10-08 18:13:28,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 69 [2021-10-08 18:13:31,123 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:13:31,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321443107] [2021-10-08 18:13:31,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 18:13:31,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [167556874] [2021-10-08 18:13:31,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:13:31,125 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-08 18:13:31,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-08 18:13:31,126 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-08 18:13:31,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-08 18:13:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:13:31,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 18:13:31,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:13:31,723 INFO L354 Elim1Store]: treesize reduction 233, result has 21.3 percent of original size [2021-10-08 18:13:31,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 73 [2021-10-08 18:13:31,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 18:13:31,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148668800] [2021-10-08 18:13:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:13:31,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 18:13:31,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 18:13:31,858 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 18:13:31,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-08 18:13:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:13:32,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 18:13:32,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:13:32,303 INFO L354 Elim1Store]: treesize reduction 241, result has 18.6 percent of original size [2021-10-08 18:13:32,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 93 [2021-10-08 18:13:32,401 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-08 18:13:32,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 108 [2021-10-08 18:13:32,802 INFO L354 Elim1Store]: treesize reduction 112, result has 15.8 percent of original size [2021-10-08 18:13:32,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 102 [2021-10-08 18:13:32,933 INFO L354 Elim1Store]: treesize reduction 108, result has 31.2 percent of original size [2021-10-08 18:13:32,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 90 treesize of output 127 [2021-10-08 18:13:33,594 INFO L354 Elim1Store]: treesize reduction 160, result has 14.0 percent of original size [2021-10-08 18:13:33,595 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 145 treesize of output 159 [2021-10-08 18:13:33,684 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-10-08 18:13:33,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 144 treesize of output 152 [2021-10-08 18:13:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:13:46,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:13:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:13:48,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148668800] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:13:48,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:13:48,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-08 18:13:48,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834184363] [2021-10-08 18:13:48,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:13:48,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:13:48,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:13:48,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=56, Unknown=5, NotChecked=0, Total=90 [2021-10-08 18:13:48,944 INFO L87 Difference]: Start difference. First operand 1637 states and 5555 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:59,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:13:59,281 INFO L93 Difference]: Finished difference Result 1445 states and 4989 transitions. [2021-10-08 18:13:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:13:59,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-08 18:13:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:13:59,288 INFO L225 Difference]: With dead ends: 1445 [2021-10-08 18:13:59,288 INFO L226 Difference]: Without dead ends: 1445 [2021-10-08 18:13:59,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 16708.1ms TimeCoverageRelationStatistics Valid=37, Invalid=68, Unknown=5, NotChecked=0, Total=110 [2021-10-08 18:13:59,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-10-08 18:13:59,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1445. [2021-10-08 18:13:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1337 states have (on average 3.731488406881077) internal successors, (4989), 1444 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4989 transitions. [2021-10-08 18:13:59,345 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4989 transitions. Word has length 8 [2021-10-08 18:13:59,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:13:59,345 INFO L470 AbstractCegarLoop]: Abstraction has 1445 states and 4989 transitions. [2021-10-08 18:13:59,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:13:59,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4989 transitions. [2021-10-08 18:13:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 18:13:59,347 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:13:59,347 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:13:59,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-08 18:13:59,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-08 18:13:59,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-08 18:13:59,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:13:59,963 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:13:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:13:59,965 INFO L82 PathProgramCache]: Analyzing trace with hash 653590890, now seen corresponding path program 1 times [2021-10-08 18:13:59,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:13:59,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518006130] [2021-10-08 18:13:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:13:59,966 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:13:59,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:13:59,967 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) [2021-10-08 18:13:59,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-08 18:14:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:14:00,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 18:14:00,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:14:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:14:00,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:14:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:14:00,306 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:14:00,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518006130] [2021-10-08 18:14:00,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518006130] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:14:00,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:14:00,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-08 18:14:00,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768493904] [2021-10-08 18:14:00,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:14:00,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:14:00,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:14:00,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:14:00,309 INFO L87 Difference]: Start difference. First operand 1445 states and 4989 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-10-08 18:14:01,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:14:01,104 INFO L93 Difference]: Finished difference Result 1371 states and 4587 transitions. [2021-10-08 18:14:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 18:14:01,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 [2021-10-08 18:14:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:14:01,109 INFO L225 Difference]: With dead ends: 1371 [2021-10-08 18:14:01,109 INFO L226 Difference]: Without dead ends: 1371 [2021-10-08 18:14:01,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-08 18:14:01,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-10-08 18:14:01,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1331. [2021-10-08 18:14:01,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1223 states have (on average 3.688470973017171) internal successors, (4511), 1330 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:01,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4511 transitions. [2021-10-08 18:14:01,151 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4511 transitions. Word has length 9 [2021-10-08 18:14:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:14:01,152 INFO L470 AbstractCegarLoop]: Abstraction has 1331 states and 4511 transitions. [2021-10-08 18:14:01,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-10-08 18:14:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4511 transitions. [2021-10-08 18:14:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 18:14:01,153 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:14:01,153 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:14:01,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-08 18:14:01,366 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 [2021-10-08 18:14:01,367 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:14:01,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:14:01,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1417945134, now seen corresponding path program 1 times [2021-10-08 18:14:01,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:14:01,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200821473] [2021-10-08 18:14:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:14:01,369 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:14:01,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:14:01,371 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:14:01,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-08 18:14:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:14:01,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 18:14:01,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:14:01,659 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-08 18:14:01,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-08 18:14:01,726 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-08 18:14:01,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-10-08 18:14:01,794 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-08 18:14:01,795 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 32 treesize of output 43 [2021-10-08 18:14:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 18:14:01,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:14:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 18:14:06,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:14:06,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200821473] [2021-10-08 18:14:06,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200821473] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:14:06,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:14:06,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 5 [2021-10-08 18:14:06,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286549791] [2021-10-08 18:14:06,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-08 18:14:06,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:14:06,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-08 18:14:06,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=23, Unknown=2, NotChecked=0, Total=42 [2021-10-08 18:14:06,058 INFO L87 Difference]: Start difference. First operand 1331 states and 4511 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:06,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:14:06,363 INFO L93 Difference]: Finished difference Result 1093 states and 3669 transitions. [2021-10-08 18:14:06,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:14:06,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-08 18:14:06,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:14:06,371 INFO L225 Difference]: With dead ends: 1093 [2021-10-08 18:14:06,371 INFO L226 Difference]: Without dead ends: 1093 [2021-10-08 18:14:06,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4105.7ms TimeCoverageRelationStatistics Valid=17, Invalid=23, Unknown=2, NotChecked=0, Total=42 [2021-10-08 18:14:06,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-10-08 18:14:06,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1093. [2021-10-08 18:14:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1018 states have (on average 3.604125736738703) internal successors, (3669), 1092 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 3669 transitions. [2021-10-08 18:14:06,407 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 3669 transitions. Word has length 10 [2021-10-08 18:14:06,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:14:06,408 INFO L470 AbstractCegarLoop]: Abstraction has 1093 states and 3669 transitions. [2021-10-08 18:14:06,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:06,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 3669 transitions. [2021-10-08 18:14:06,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 18:14:06,409 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:14:06,409 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:14:06,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-08 18:14:06,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:14:06,623 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:14:06,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:14:06,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1417945135, now seen corresponding path program 1 times [2021-10-08 18:14:06,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:14:06,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335529228] [2021-10-08 18:14:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:14:06,626 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:14:06,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:14:06,627 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:14:06,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-08 18:14:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:14:06,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-08 18:14:06,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:14:06,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:14:06,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:14:07,189 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:14:07,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-08 18:14:07,281 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-08 18:14:07,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 103 [2021-10-08 18:14:07,463 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-08 18:14:07,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-10-08 18:14:07,477 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 18:14:07,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-10-08 18:14:08,724 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-10-08 18:14:08,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 43 [2021-10-08 18:14:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 18:14:09,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:14:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 18:14:10,456 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:14:10,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335529228] [2021-10-08 18:14:10,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335529228] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:14:10,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:14:10,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2021-10-08 18:14:10,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257152538] [2021-10-08 18:14:10,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-08 18:14:10,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:14:10,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-08 18:14:10,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-08 18:14:10,458 INFO L87 Difference]: Start difference. First operand 1093 states and 3669 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:14:57,040 INFO L93 Difference]: Finished difference Result 8267 states and 28985 transitions. [2021-10-08 18:14:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-08 18:14:57,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-08 18:14:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:14:57,089 INFO L225 Difference]: With dead ends: 8267 [2021-10-08 18:14:57,089 INFO L226 Difference]: Without dead ends: 8267 [2021-10-08 18:14:57,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 13559.5ms TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2021-10-08 18:14:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2021-10-08 18:14:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 1575. [2021-10-08 18:14:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1500 states have (on average 3.9346666666666668) internal successors, (5902), 1574 states have internal predecessors, (5902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:57,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5902 transitions. [2021-10-08 18:14:57,262 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5902 transitions. Word has length 10 [2021-10-08 18:14:57,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:14:57,263 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5902 transitions. [2021-10-08 18:14:57,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:14:57,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5902 transitions. [2021-10-08 18:14:57,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 18:14:57,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:14:57,264 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:14:57,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-08 18:14:57,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:14:57,480 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:14:57,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:14:57,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1417945289, now seen corresponding path program 1 times [2021-10-08 18:14:57,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:14:57,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34443047] [2021-10-08 18:14:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:14:57,482 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:14:57,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:14:57,483 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:14:57,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-08 18:14:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:14:57,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-08 18:14:57,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:14:57,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 18:14:57,797 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-08 18:14:57,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-10-08 18:14:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 18:14:57,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:15:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 18:15:00,019 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:15:00,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34443047] [2021-10-08 18:15:00,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34443047] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:15:00,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:15:00,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-08 18:15:00,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727985294] [2021-10-08 18:15:00,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 18:15:00,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:15:00,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 18:15:00,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=18, Unknown=1, NotChecked=0, Total=30 [2021-10-08 18:15:00,023 INFO L87 Difference]: Start difference. First operand 1575 states and 5902 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2021-10-08 18:15:00,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:15:00,364 INFO L93 Difference]: Finished difference Result 1309 states and 4690 transitions. [2021-10-08 18:15:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:15:00,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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 10 [2021-10-08 18:15:00,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:15:00,375 INFO L225 Difference]: With dead ends: 1309 [2021-10-08 18:15:00,376 INFO L226 Difference]: Without dead ends: 1309 [2021-10-08 18:15:00,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2072.6ms TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2021-10-08 18:15:00,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-10-08 18:15:00,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1309. [2021-10-08 18:15:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1261 states have (on average 3.7192704203013482) internal successors, (4690), 1308 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:15:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4690 transitions. [2021-10-08 18:15:00,415 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4690 transitions. Word has length 10 [2021-10-08 18:15:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:15:00,415 INFO L470 AbstractCegarLoop]: Abstraction has 1309 states and 4690 transitions. [2021-10-08 18:15:00,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2021-10-08 18:15:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4690 transitions. [2021-10-08 18:15:00,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 18:15:00,417 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:15:00,417 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:15:00,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-08 18:15:00,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:15:00,631 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:15:00,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:15:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1417945290, now seen corresponding path program 1 times [2021-10-08 18:15:00,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:15:00,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019401075] [2021-10-08 18:15:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:15:00,633 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:15:00,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:15:00,634 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:15:00,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-08 18:15:00,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:15:00,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 18:15:00,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:15:00,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 18:15:01,005 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 19 treesize of output 18 [2021-10-08 18:15:01,104 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-08 18:15:01,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-10-08 18:15:01,120 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 18:15:01,120 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 36 treesize of output 36 [2021-10-08 18:15:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 18:15:03,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:15:03,848 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 34 treesize of output 32 [2021-10-08 18:15:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 18:15:04,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:15:04,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019401075] [2021-10-08 18:15:04,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019401075] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:15:04,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:15:04,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-08 18:15:04,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213769430] [2021-10-08 18:15:04,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 18:15:04,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:15:04,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 18:15:04,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-08 18:15:04,037 INFO L87 Difference]: Start difference. First operand 1309 states and 4690 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:15:42,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:15:42,016 INFO L93 Difference]: Finished difference Result 6928 states and 24021 transitions. [2021-10-08 18:15:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-08 18:15:42,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-08 18:15:42,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:15:42,086 INFO L225 Difference]: With dead ends: 6928 [2021-10-08 18:15:42,086 INFO L226 Difference]: Without dead ends: 6928 [2021-10-08 18:15:42,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 16945.1ms TimeCoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2021-10-08 18:15:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6928 states. [2021-10-08 18:15:42,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6928 to 1414. [2021-10-08 18:15:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1366 states have (on average 3.6961932650073206) internal successors, (5049), 1413 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:15:42,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 5049 transitions. [2021-10-08 18:15:42,174 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 5049 transitions. Word has length 10 [2021-10-08 18:15:42,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:15:42,175 INFO L470 AbstractCegarLoop]: Abstraction has 1414 states and 5049 transitions. [2021-10-08 18:15:42,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:15:42,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 5049 transitions. [2021-10-08 18:15:42,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 18:15:42,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:15:42,176 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:15:42,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-08 18:15:42,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:15:42,390 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:15:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:15:42,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1043029946, now seen corresponding path program 1 times [2021-10-08 18:15:42,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:15:42,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515021164] [2021-10-08 18:15:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:15:42,393 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:15:42,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:15:42,394 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:15:42,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-08 18:15:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:15:42,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 18:15:42,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:15:42,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 18:15:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:15:42,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:15:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:15:42,686 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:15:42,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515021164] [2021-10-08 18:15:42,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515021164] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:15:42,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:15:42,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-08 18:15:42,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856267296] [2021-10-08 18:15:42,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:15:42,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:15:42,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:15:42,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:15:42,688 INFO L87 Difference]: Start difference. First operand 1414 states and 5049 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:15:42,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:15:42,958 INFO L93 Difference]: Finished difference Result 1082 states and 3821 transitions. [2021-10-08 18:15:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:15:42,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 18:15:42,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:15:42,963 INFO L225 Difference]: With dead ends: 1082 [2021-10-08 18:15:42,963 INFO L226 Difference]: Without dead ends: 1082 [2021-10-08 18:15:42,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-08 18:15:42,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-10-08 18:15:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1082. [2021-10-08 18:15:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1055 states have (on average 3.621800947867299) internal successors, (3821), 1081 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:15:43,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 3821 transitions. [2021-10-08 18:15:43,045 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 3821 transitions. Word has length 11 [2021-10-08 18:15:43,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:15:43,045 INFO L470 AbstractCegarLoop]: Abstraction has 1082 states and 3821 transitions. [2021-10-08 18:15:43,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:15:43,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 3821 transitions. [2021-10-08 18:15:43,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 18:15:43,046 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:15:43,046 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:15:43,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-08 18:15:43,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:15:43,262 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:15:43,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:15:43,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1043029948, now seen corresponding path program 1 times [2021-10-08 18:15:43,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:15:43,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101881908] [2021-10-08 18:15:43,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:15:43,264 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:15:43,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:15:43,265 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:15:43,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-08 18:15:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:15:43,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 18:15:43,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:15:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:15:43,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:15:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:15:43,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:15:43,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101881908] [2021-10-08 18:15:43,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101881908] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:15:43,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:15:43,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-08 18:15:43,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384416115] [2021-10-08 18:15:43,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 18:15:43,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:15:43,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 18:15:43,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-08 18:15:43,581 INFO L87 Difference]: Start difference. First operand 1082 states and 3821 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:15:43,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:15:43,734 INFO L93 Difference]: Finished difference Result 1718 states and 6088 transitions. [2021-10-08 18:15:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 18:15:43,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 18:15:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:15:43,741 INFO L225 Difference]: With dead ends: 1718 [2021-10-08 18:15:43,742 INFO L226 Difference]: Without dead ends: 1718 [2021-10-08 18:15:43,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-08 18:15:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2021-10-08 18:15:43,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1348. [2021-10-08 18:15:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1321 states have (on average 3.6782740348221044) internal successors, (4859), 1347 states have internal predecessors, (4859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:15:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4859 transitions. [2021-10-08 18:15:43,783 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4859 transitions. Word has length 11 [2021-10-08 18:15:43,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:15:43,783 INFO L470 AbstractCegarLoop]: Abstraction has 1348 states and 4859 transitions. [2021-10-08 18:15:43,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:15:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4859 transitions. [2021-10-08 18:15:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 18:15:43,784 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:15:43,784 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:15:43,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-08 18:15:43,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:15:43,997 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:15:43,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:15:43,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1140815386, now seen corresponding path program 1 times [2021-10-08 18:15:43,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:15:43,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730486235] [2021-10-08 18:15:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:15:43,999 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:15:44,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:15:44,001 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:15:44,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-08 18:15:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:15:44,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-08 18:15:44,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:15:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 18:15:44,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:15:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 18:15:44,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:15:44,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730486235] [2021-10-08 18:15:44,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730486235] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:15:44,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:15:44,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-08 18:15:44,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241116549] [2021-10-08 18:15:44,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 18:15:44,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:15:44,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 18:15:44,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-08 18:15:44,628 INFO L87 Difference]: Start difference. First operand 1348 states and 4859 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:15:46,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:15:46,449 INFO L93 Difference]: Finished difference Result 2264 states and 7928 transitions. [2021-10-08 18:15:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-08 18:15:46,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 18:15:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:15:46,458 INFO L225 Difference]: With dead ends: 2264 [2021-10-08 18:15:46,458 INFO L226 Difference]: Without dead ends: 2264 [2021-10-08 18:15:46,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 472.9ms TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-10-08 18:15:46,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-10-08 18:15:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1739. [2021-10-08 18:15:46,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1739 states, 1712 states have (on average 3.7167056074766354) internal successors, (6363), 1738 states have internal predecessors, (6363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:15:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 6363 transitions. [2021-10-08 18:15:46,513 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 6363 transitions. Word has length 12 [2021-10-08 18:15:46,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:15:46,514 INFO L470 AbstractCegarLoop]: Abstraction has 1739 states and 6363 transitions. [2021-10-08 18:15:46,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:15:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 6363 transitions. [2021-10-08 18:15:46,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 18:15:46,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:15:46,515 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:15:46,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-08 18:15:46,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:15:46,729 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:15:46,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:15:46,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1148829602, now seen corresponding path program 1 times [2021-10-08 18:15:46,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:15:46,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501762890] [2021-10-08 18:15:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:15:46,732 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:15:46,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:15:46,734 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:15:46,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-08 18:15:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:15:47,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-08 18:15:47,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:15:47,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:15:47,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:15:47,364 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:15:47,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-08 18:15:47,459 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-08 18:15:47,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 103 [2021-10-08 18:15:47,688 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-08 18:15:47,689 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 29 treesize of output 31 [2021-10-08 18:15:47,706 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 18:15:47,706 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 28 treesize of output 28 [2021-10-08 18:15:47,917 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-10-08 18:15:47,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 43 [2021-10-08 18:15:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 18:15:49,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:15:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 18:15:50,191 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:15:50,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501762890] [2021-10-08 18:15:50,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501762890] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:15:50,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:15:50,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2021-10-08 18:15:50,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335992563] [2021-10-08 18:15:50,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-08 18:15:50,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:15:50,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-08 18:15:50,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-08 18:15:50,193 INFO L87 Difference]: Start difference. First operand 1739 states and 6363 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:15:59,519 WARN L207 SmtUtils]: Spent 5.40 s on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-10-08 18:16:21,743 WARN L207 SmtUtils]: Spent 5.51 s on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-10-08 18:16:28,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:16:28,534 INFO L93 Difference]: Finished difference Result 5367 states and 18986 transitions. [2021-10-08 18:16:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-08 18:16:28,535 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 18:16:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:16:28,556 INFO L225 Difference]: With dead ends: 5367 [2021-10-08 18:16:28,556 INFO L226 Difference]: Without dead ends: 5367 [2021-10-08 18:16:28,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 24193.1ms TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2021-10-08 18:16:28,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5367 states. [2021-10-08 18:16:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5367 to 1982. [2021-10-08 18:16:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1955 states have (on average 3.8086956521739133) internal successors, (7446), 1981 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:16:28,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 7446 transitions. [2021-10-08 18:16:28,676 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 7446 transitions. Word has length 12 [2021-10-08 18:16:28,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:16:28,676 INFO L470 AbstractCegarLoop]: Abstraction has 1982 states and 7446 transitions. [2021-10-08 18:16:28,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:16:28,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 7446 transitions. [2021-10-08 18:16:28,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 18:16:28,678 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:16:28,678 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:16:28,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-08 18:16:28,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:16:28,895 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:16:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:16:28,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1148829603, now seen corresponding path program 1 times [2021-10-08 18:16:28,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:16:28,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647675115] [2021-10-08 18:16:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:16:28,898 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:16:28,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:16:28,899 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:16:28,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-08 18:16:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:16:29,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 18:16:29,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:16:29,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 18:16:29,326 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 19 treesize of output 18 [2021-10-08 18:16:29,419 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-08 18:16:29,419 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 39 treesize of output 41 [2021-10-08 18:16:29,432 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 18:16:29,432 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 38 treesize of output 38 [2021-10-08 18:16:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 18:16:31,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:16:32,269 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 30 treesize of output 28 [2021-10-08 18:16:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 18:16:32,448 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:16:32,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647675115] [2021-10-08 18:16:32,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647675115] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:16:32,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:16:32,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-08 18:16:32,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101279302] [2021-10-08 18:16:32,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 18:16:32,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:16:32,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 18:16:32,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-08 18:16:32,451 INFO L87 Difference]: Start difference. First operand 1982 states and 7446 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:16:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:16:57,836 INFO L93 Difference]: Finished difference Result 5238 states and 18656 transitions. [2021-10-08 18:16:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-08 18:16:57,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 18:16:57,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:16:57,855 INFO L225 Difference]: With dead ends: 5238 [2021-10-08 18:16:57,855 INFO L226 Difference]: Without dead ends: 5238 [2021-10-08 18:16:57,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 14344.4ms TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2021-10-08 18:16:57,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2021-10-08 18:16:57,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 1968. [2021-10-08 18:16:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1941 states have (on average 3.826378155589902) internal successors, (7427), 1967 states have internal predecessors, (7427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:16:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 7427 transitions. [2021-10-08 18:16:57,960 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 7427 transitions. Word has length 12 [2021-10-08 18:16:57,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:16:57,961 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 7427 transitions. [2021-10-08 18:16:57,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:16:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 7427 transitions. [2021-10-08 18:16:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 18:16:57,962 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:16:57,962 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:16:57,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-08 18:16:58,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:16:58,177 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:16:58,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:16:58,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1148829604, now seen corresponding path program 1 times [2021-10-08 18:16:58,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:16:58,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429700286] [2021-10-08 18:16:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:16:58,179 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:16:58,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:16:58,181 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:16:58,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-08 18:16:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:16:58,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 18:16:58,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:16:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 18:16:58,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:16:58,888 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 25 treesize of output 21 [2021-10-08 18:16:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 18:16:59,002 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:16:59,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429700286] [2021-10-08 18:16:59,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429700286] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:16:59,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:16:59,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-08 18:16:59,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36344887] [2021-10-08 18:16:59,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 18:16:59,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:16:59,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 18:16:59,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-08 18:16:59,005 INFO L87 Difference]: Start difference. First operand 1968 states and 7427 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:00,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:17:00,525 INFO L93 Difference]: Finished difference Result 2398 states and 8350 transitions. [2021-10-08 18:17:00,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 18:17:00,527 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 18:17:00,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:17:00,536 INFO L225 Difference]: With dead ends: 2398 [2021-10-08 18:17:00,536 INFO L226 Difference]: Without dead ends: 2398 [2021-10-08 18:17:00,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 580.5ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-08 18:17:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2021-10-08 18:17:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1906. [2021-10-08 18:17:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1879 states have (on average 3.745609366684407) internal successors, (7038), 1905 states have internal predecessors, (7038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 7038 transitions. [2021-10-08 18:17:00,600 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 7038 transitions. Word has length 12 [2021-10-08 18:17:00,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:17:00,600 INFO L470 AbstractCegarLoop]: Abstraction has 1906 states and 7038 transitions. [2021-10-08 18:17:00,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 7038 transitions. [2021-10-08 18:17:00,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 18:17:00,601 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:17:00,602 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:17:00,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-08 18:17:00,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:17:00,803 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:17:00,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:17:00,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1662064063, now seen corresponding path program 2 times [2021-10-08 18:17:00,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:17:00,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649646952] [2021-10-08 18:17:00,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:17:00,805 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:17:00,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:17:00,807 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:17:00,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-08 18:17:01,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 18:17:01,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:17:01,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 18:17:01,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:17:01,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:17:01,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:17:01,371 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:17:01,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-08 18:17:01,470 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-08 18:17:01,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 103 [2021-10-08 18:17:01,655 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-08 18:17:01,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-10-08 18:17:01,670 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 18:17:01,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-10-08 18:17:03,823 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-10-08 18:17:03,823 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 27 treesize of output 36 [2021-10-08 18:17:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-08 18:17:04,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:17:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-08 18:17:05,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:17:05,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649646952] [2021-10-08 18:17:05,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649646952] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:17:05,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:17:05,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-10-08 18:17:05,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721573034] [2021-10-08 18:17:05,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 18:17:05,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:17:05,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 18:17:05,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-08 18:17:05,302 INFO L87 Difference]: Start difference. First operand 1906 states and 7038 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:08,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:17:08,974 INFO L93 Difference]: Finished difference Result 2360 states and 8565 transitions. [2021-10-08 18:17:08,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-08 18:17:08,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-08 18:17:08,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:17:08,991 INFO L225 Difference]: With dead ends: 2360 [2021-10-08 18:17:08,991 INFO L226 Difference]: Without dead ends: 2360 [2021-10-08 18:17:08,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3190.5ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-10-08 18:17:08,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-10-08 18:17:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 1838. [2021-10-08 18:17:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1811 states have (on average 3.732744340143567) internal successors, (6760), 1837 states have internal predecessors, (6760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 6760 transitions. [2021-10-08 18:17:09,054 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 6760 transitions. Word has length 13 [2021-10-08 18:17:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:17:09,054 INFO L470 AbstractCegarLoop]: Abstraction has 1838 states and 6760 transitions. [2021-10-08 18:17:09,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:09,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 6760 transitions. [2021-10-08 18:17:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 18:17:09,056 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:17:09,056 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1] [2021-10-08 18:17:09,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-08 18:17:09,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:17:09,270 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:17:09,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:17:09,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1433709248, now seen corresponding path program 1 times [2021-10-08 18:17:09,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:17:09,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884912640] [2021-10-08 18:17:09,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:17:09,272 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:17:09,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:17:09,273 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:17:09,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-08 18:17:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:17:09,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-08 18:17:09,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:17:09,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-10-08 18:17:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:17:10,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:17:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:17:13,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:17:13,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884912640] [2021-10-08 18:17:13,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884912640] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:17:13,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:17:13,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-08 18:17:13,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711524766] [2021-10-08 18:17:13,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-08 18:17:13,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:17:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-08 18:17:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-10-08 18:17:13,471 INFO L87 Difference]: Start difference. First operand 1838 states and 6760 transitions. Second operand has 25 states, 25 states have (on average 1.04) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:47,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:17:47,423 INFO L93 Difference]: Finished difference Result 15681 states and 59365 transitions. [2021-10-08 18:17:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-08 18:17:47,425 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.04) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-08 18:17:47,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:17:47,489 INFO L225 Difference]: With dead ends: 15681 [2021-10-08 18:17:47,490 INFO L226 Difference]: Without dead ends: 15681 [2021-10-08 18:17:47,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 6544.5ms TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2021-10-08 18:17:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15681 states. [2021-10-08 18:17:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15681 to 1873. [2021-10-08 18:17:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1846 states have (on average 3.6960996749729143) internal successors, (6823), 1872 states have internal predecessors, (6823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 6823 transitions. [2021-10-08 18:17:47,767 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 6823 transitions. Word has length 13 [2021-10-08 18:17:47,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:17:47,767 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 6823 transitions. [2021-10-08 18:17:47,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.04) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 6823 transitions. [2021-10-08 18:17:47,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 18:17:47,769 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:17:47,769 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:17:47,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-08 18:17:47,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:17:47,978 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:17:47,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:17:47,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1253983396, now seen corresponding path program 1 times [2021-10-08 18:17:47,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:17:47,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901137038] [2021-10-08 18:17:47,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:17:47,980 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:17:47,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:17:47,982 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:17:47,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-08 18:17:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:17:48,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-08 18:17:48,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:17:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 18:17:48,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:17:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 18:17:48,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:17:48,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901137038] [2021-10-08 18:17:48,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901137038] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:17:48,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:17:48,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-08 18:17:48,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398440102] [2021-10-08 18:17:48,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 18:17:48,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:17:48,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 18:17:48,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-08 18:17:48,945 INFO L87 Difference]: Start difference. First operand 1873 states and 6823 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:17:50,349 INFO L93 Difference]: Finished difference Result 1875 states and 6488 transitions. [2021-10-08 18:17:50,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-08 18:17:50,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-08 18:17:50,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:17:50,356 INFO L225 Difference]: With dead ends: 1875 [2021-10-08 18:17:50,357 INFO L226 Difference]: Without dead ends: 1875 [2021-10-08 18:17:50,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 581.6ms TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-10-08 18:17:50,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-10-08 18:17:50,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1678. [2021-10-08 18:17:50,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1651 states have (on average 3.6274984857662025) internal successors, (5989), 1677 states have internal predecessors, (5989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 5989 transitions. [2021-10-08 18:17:50,447 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 5989 transitions. Word has length 13 [2021-10-08 18:17:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:17:50,448 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 5989 transitions. [2021-10-08 18:17:50,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 5989 transitions. [2021-10-08 18:17:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 18:17:50,449 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:17:50,450 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:17:50,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-08 18:17:50,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:17:50,659 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:17:50,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:17:50,660 INFO L82 PathProgramCache]: Analyzing trace with hash 492457268, now seen corresponding path program 2 times [2021-10-08 18:17:50,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:17:50,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60076248] [2021-10-08 18:17:50,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:17:50,661 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:17:50,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:17:50,663 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:17:50,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-08 18:17:50,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 18:17:50,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:17:50,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 18:17:50,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:17:50,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:17:50,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:17:51,269 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:17:51,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-08 18:17:51,374 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-08 18:17:51,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 103 [2021-10-08 18:17:51,557 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-08 18:17:51,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-10-08 18:17:51,574 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 18:17:51,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-10-08 18:17:52,004 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-10-08 18:17:52,005 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 27 treesize of output 36 [2021-10-08 18:17:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-08 18:17:54,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:17:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-08 18:17:55,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:17:55,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60076248] [2021-10-08 18:17:55,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60076248] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:17:55,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:17:55,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-10-08 18:17:55,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417234329] [2021-10-08 18:17:55,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-08 18:17:55,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:17:55,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-08 18:17:55,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-08 18:17:55,337 INFO L87 Difference]: Start difference. First operand 1678 states and 5989 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:17:58,602 INFO L93 Difference]: Finished difference Result 1808 states and 6822 transitions. [2021-10-08 18:17:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-08 18:17:58,603 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-08 18:17:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:17:58,608 INFO L225 Difference]: With dead ends: 1808 [2021-10-08 18:17:58,608 INFO L226 Difference]: Without dead ends: 1808 [2021-10-08 18:17:58,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 4874.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-10-08 18:17:58,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2021-10-08 18:17:58,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1444. [2021-10-08 18:17:58,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1417 states have (on average 3.959774170783345) internal successors, (5611), 1443 states have internal predecessors, (5611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5611 transitions. [2021-10-08 18:17:58,640 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5611 transitions. Word has length 15 [2021-10-08 18:17:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:17:58,640 INFO L470 AbstractCegarLoop]: Abstraction has 1444 states and 5611 transitions. [2021-10-08 18:17:58,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:17:58,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5611 transitions. [2021-10-08 18:17:58,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 18:17:58,641 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:17:58,641 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1] [2021-10-08 18:17:58,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-08 18:17:58,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:17:58,842 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:17:58,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:17:58,843 INFO L82 PathProgramCache]: Analyzing trace with hash -560465838, now seen corresponding path program 2 times [2021-10-08 18:17:58,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:17:58,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277476896] [2021-10-08 18:17:58,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:17:58,844 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:17:58,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:17:58,845 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:17:58,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-08 18:17:59,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 18:17:59,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:17:59,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-08 18:17:59,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:17:59,339 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 16 treesize of output 15 [2021-10-08 18:17:59,880 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:17:59,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:18:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:18:03,914 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:18:03,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277476896] [2021-10-08 18:18:03,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277476896] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:18:03,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:18:03,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 27 [2021-10-08 18:18:03,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139601938] [2021-10-08 18:18:03,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-08 18:18:03,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:18:03,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-08 18:18:03,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-10-08 18:18:03,916 INFO L87 Difference]: Start difference. First operand 1444 states and 5611 transitions. Second operand has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:46,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:18:46,838 INFO L93 Difference]: Finished difference Result 17674 states and 73168 transitions. [2021-10-08 18:18:46,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-08 18:18:46,841 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-08 18:18:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:18:46,996 INFO L225 Difference]: With dead ends: 17674 [2021-10-08 18:18:46,997 INFO L226 Difference]: Without dead ends: 17674 [2021-10-08 18:18:46,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 10353.0ms TimeCoverageRelationStatistics Valid=516, Invalid=2240, Unknown=0, NotChecked=0, Total=2756 [2021-10-08 18:18:47,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17674 states. [2021-10-08 18:18:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17674 to 1449. [2021-10-08 18:18:47,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1422 states have (on average 3.9528832630098454) internal successors, (5621), 1448 states have internal predecessors, (5621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 5621 transitions. [2021-10-08 18:18:47,273 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 5621 transitions. Word has length 15 [2021-10-08 18:18:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:18:47,273 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 5621 transitions. [2021-10-08 18:18:47,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 5621 transitions. [2021-10-08 18:18:47,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 18:18:47,280 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:18:47,280 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:18:47,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-08 18:18:47,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:18:47,493 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:18:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:18:47,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1845223262, now seen corresponding path program 1 times [2021-10-08 18:18:47,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:18:47,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876587864] [2021-10-08 18:18:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:18:47,495 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:18:47,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:18:47,496 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:18:47,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-08 18:18:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:18:47,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-08 18:18:47,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:18:48,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:18:48,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:18:48,405 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:18:48,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 18:18:48,604 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-08 18:18:48,605 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 28 treesize of output 28 [2021-10-08 18:18:48,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 18:18:48,800 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-10-08 18:18:48,801 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 51 treesize of output 60 [2021-10-08 18:18:48,817 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 18:18:48,818 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 54 treesize of output 54 [2021-10-08 18:18:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-08 18:18:51,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:18:52,143 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 30 treesize of output 28 [2021-10-08 18:18:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-08 18:18:52,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:18:52,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876587864] [2021-10-08 18:18:52,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876587864] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:18:52,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:18:52,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 18:18:52,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567324400] [2021-10-08 18:18:52,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 18:18:52,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:18:52,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 18:18:52,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-08 18:18:52,614 INFO L87 Difference]: Start difference. First operand 1449 states and 5621 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:21,945 WARN L207 SmtUtils]: Spent 7.11 s on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-10-08 18:20:52,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:20:52,289 INFO L93 Difference]: Finished difference Result 8339 states and 31858 transitions. [2021-10-08 18:20:52,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-08 18:20:52,291 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-08 18:20:52,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:20:52,319 INFO L225 Difference]: With dead ends: 8339 [2021-10-08 18:20:52,319 INFO L226 Difference]: Without dead ends: 8339 [2021-10-08 18:20:52,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 79453.3ms TimeCoverageRelationStatistics Valid=599, Invalid=2475, Unknown=6, NotChecked=0, Total=3080 [2021-10-08 18:20:52,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8339 states. [2021-10-08 18:20:52,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8339 to 1877. [2021-10-08 18:20:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1850 states have (on average 3.9064864864864863) internal successors, (7227), 1876 states have internal predecessors, (7227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 7227 transitions. [2021-10-08 18:20:52,412 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 7227 transitions. Word has length 15 [2021-10-08 18:20:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:20:52,413 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 7227 transitions. [2021-10-08 18:20:52,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 7227 transitions. [2021-10-08 18:20:52,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 18:20:52,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:20:52,414 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-08 18:20:52,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-10-08 18:20:52,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:20:52,615 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:20:52,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:20:52,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1026697790, now seen corresponding path program 3 times [2021-10-08 18:20:52,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:20:52,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162856480] [2021-10-08 18:20:52,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 18:20:52,618 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:20:52,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:20:52,619 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:20:52,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-08 18:20:53,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-08 18:20:53,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:20:53,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-08 18:20:53,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:20:53,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:20:53,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:20:53,523 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:20:53,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 18:20:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:20:54,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:21:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:21:00,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:21:00,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162856480] [2021-10-08 18:21:00,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162856480] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:21:00,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:21:00,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-08 18:21:00,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744515984] [2021-10-08 18:21:00,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-08 18:21:00,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:21:00,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-08 18:21:00,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-08 18:21:00,508 INFO L87 Difference]: Start difference. First operand 1877 states and 7227 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:21:14,988 WARN L207 SmtUtils]: Spent 10.94 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-08 18:21:25,319 WARN L207 SmtUtils]: Spent 9.03 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-08 18:21:32,588 WARN L207 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-08 18:23:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:23:10,696 INFO L93 Difference]: Finished difference Result 16786 states and 69475 transitions. [2021-10-08 18:23:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-08 18:23:10,698 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-08 18:23:10,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:23:10,900 INFO L225 Difference]: With dead ends: 16786 [2021-10-08 18:23:10,900 INFO L226 Difference]: Without dead ends: 16786 [2021-10-08 18:23:10,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 61475.8ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-08 18:23:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16786 states. [2021-10-08 18:23:11,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16786 to 1885. [2021-10-08 18:23:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1858 states have (on average 3.897201291711518) internal successors, (7241), 1884 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:23:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 7241 transitions. [2021-10-08 18:23:11,231 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 7241 transitions. Word has length 16 [2021-10-08 18:23:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:23:11,232 INFO L470 AbstractCegarLoop]: Abstraction has 1885 states and 7241 transitions. [2021-10-08 18:23:11,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:23:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 7241 transitions. [2021-10-08 18:23:11,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 18:23:11,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:23:11,233 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:23:11,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-10-08 18:23:11,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:23:11,439 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-08 18:23:11,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:23:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1615786268, now seen corresponding path program 1 times [2021-10-08 18:23:11,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:23:11,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430835192] [2021-10-08 18:23:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:23:11,441 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:23:11,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:23:11,443 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:23:11,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-08 18:23:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:23:12,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-08 18:23:12,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:23:12,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:23:12,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:23:12,516 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:23:12,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 18:23:12,718 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-08 18:23:12,719 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 28 treesize of output 28 [2021-10-08 18:23:12,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-08 18:23:13,004 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-10-08 18:23:13,004 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 50 treesize of output 57 [2021-10-08 18:23:13,022 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-08 18:23:13,022 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 53 treesize of output 53 [2021-10-08 18:23:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-08 18:23:17,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:23:18,416 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 26 treesize of output 24 [2021-10-08 18:23:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-08 18:23:18,914 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:23:18,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430835192] [2021-10-08 18:23:18,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430835192] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:23:18,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:23:18,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 18:23:18,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332976071] [2021-10-08 18:23:18,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 18:23:18,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:23:18,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 18:23:18,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-08 18:23:18,916 INFO L87 Difference]: Start difference. First operand 1885 states and 7241 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:23:25,497 WARN L207 SmtUtils]: Spent 5.07 s on a formula simplification that was a NOOP. DAG size: 55 Received shutdown request... [2021-10-08 18:24:28,573 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-08 18:24:28,576 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-08 18:24:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-08 18:24:28,624 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-08 18:24:28,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-08 18:24:28,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:24:28,828 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). [2021-10-08 18:24:28,830 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-08 18:24:28,830 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-08 18:24:28,831 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-08 18:24:28,831 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-08 18:24:28,831 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-08 18:24:28,831 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-08 18:24:28,831 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-08 18:24:28,831 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-08 18:24:28,831 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err4REQUIRES_VIOLATION [2021-10-08 18:24:28,831 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err5REQUIRES_VIOLATION [2021-10-08 18:24:28,832 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-08 18:24:28,832 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-08 18:24:28,832 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-08 18:24:28,832 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-08 18:24:28,832 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-08 18:24:28,832 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-08 18:24:28,832 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-08 18:24:28,832 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-08 18:24:28,832 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-08 18:24:28,833 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-08 18:24:28,833 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-08 18:24:28,833 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-08 18:24:28,833 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-08 18:24:28,833 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-08 18:24:28,833 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-08 18:24:28,833 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-08 18:24:28,833 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-08 18:24:28,833 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-08 18:24:28,834 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-08 18:24:28,834 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-08 18:24:28,834 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 18:24:28,834 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 18:24:28,834 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 18:24:28,834 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 18:24:28,834 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-08 18:24:28,834 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-08 18:24:28,835 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-08 18:24:28,835 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-08 18:24:28,835 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-08 18:24:28,835 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-08 18:24:28,835 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-08 18:24:28,835 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-08 18:24:28,835 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err4REQUIRES_VIOLATION [2021-10-08 18:24:28,835 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err5REQUIRES_VIOLATION [2021-10-08 18:24:28,835 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-08 18:24:28,835 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-08 18:24:28,843 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 18:24:28,843 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 18:24:28,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.10 06:24:28 BasicIcfg [2021-10-08 18:24:28,845 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-08 18:24:28,847 INFO L168 Benchmark]: Toolchain (without parser) took 838088.14 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 145.1 MB in the beginning and 101.2 MB in the end (delta: 43.9 MB). Peak memory consumption was 76.4 MB. Max. memory is 8.0 GB. [2021-10-08 18:24:28,847 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 162.5 MB. Free memory was 134.2 MB in the beginning and 134.1 MB in the end (delta: 102.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-08 18:24:28,847 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.90 ms. Allocated memory is still 162.5 MB. Free memory was 144.8 MB in the beginning and 131.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-08 18:24:28,848 INFO L168 Benchmark]: Boogie Procedure Inliner took 98.77 ms. Allocated memory is still 162.5 MB. Free memory was 131.5 MB in the beginning and 144.0 MB in the end (delta: -12.5 MB). Peak memory consumption was 2.9 MB. Max. memory is 8.0 GB. [2021-10-08 18:24:28,848 INFO L168 Benchmark]: Boogie Preprocessor took 42.16 ms. Allocated memory is still 162.5 MB. Free memory was 143.7 MB in the beginning and 141.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 18:24:28,848 INFO L168 Benchmark]: RCFGBuilder took 1518.29 ms. Allocated memory is still 162.5 MB. Free memory was 141.9 MB in the beginning and 110.8 MB in the end (delta: 31.1 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. [2021-10-08 18:24:28,849 INFO L168 Benchmark]: TraceAbstraction took 836025.53 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 110.4 MB in the beginning and 101.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 42.1 MB. Max. memory is 8.0 GB. [2021-10-08 18:24:28,850 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 162.5 MB. Free memory was 134.2 MB in the beginning and 134.1 MB in the end (delta: 102.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 385.90 ms. Allocated memory is still 162.5 MB. Free memory was 144.8 MB in the beginning and 131.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 98.77 ms. Allocated memory is still 162.5 MB. Free memory was 131.5 MB in the beginning and 144.0 MB in the end (delta: -12.5 MB). Peak memory consumption was 2.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.16 ms. Allocated memory is still 162.5 MB. Free memory was 143.7 MB in the beginning and 141.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1518.29 ms. Allocated memory is still 162.5 MB. Free memory was 141.9 MB in the beginning and 110.8 MB in the end (delta: 31.1 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 836025.53 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 110.4 MB in the beginning and 101.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 42.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 44251.3ms, 228 PlacesBefore, 69 PlacesAfterwards, 238 TransitionsBefore, 66 TransitionsAfterwards, 3582 CoEnabledTransitionPairs, 7 FixpointIterations, 144 TrivialSequentialCompositions, 70 ConcurrentSequentialCompositions, 23 TrivialYvCompositions, 6 ConcurrentYvCompositions, 13 ChoiceCompositions, 256 TotalNumberOfCompositions, 6092 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4676, positive: 4595, positive conditional: 0, positive unconditional: 4595, negative: 81, negative conditional: 0, negative unconditional: 81, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2058, positive: 2027, positive conditional: 0, positive unconditional: 2027, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2058, positive: 2027, positive conditional: 0, positive unconditional: 2027, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 31, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 4405, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 4405, negative conditional: 0, negative unconditional: 4405, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4676, positive: 2568, positive conditional: 0, positive unconditional: 2568, negative: 50, negative conditional: 0, negative unconditional: 50, unknown: 2058, unknown conditional: 0, unknown unconditional: 2058] , Statistics on independence cache: Total cache size (in pairs): 222, Positive cache size: 214, Positive conditional cache size: 0, Positive unconditional cache size: 214, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 91]: 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 (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 90]: 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 (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1885states) and FLOYD_HOARE automaton (currently 45 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (1969 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 269 locations, 47 error locations. Started 1 CEGAR loops. OverallTime: 835810.8ms, OverallIterations: 27, TraceHistogramMax: 14, EmptinessCheckTime: 43.7ms, AutomataDifference: 638070.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 44421.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1355 SDtfs, 20811 SDslu, 9963 SDs, 0 SdLazy, 18671 SolverSat, 2722 SolverUnsat, 80 SolverUnknown, 0 SolverNotchecked, 358384.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 768 GetRequests, 236 SyntacticMatches, 7 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 342481.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2318occurred in iteration=3, InterpolantAutomatonStates: 365, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3233.3ms AutomataMinimizationTime, 26 MinimizatonAttempts, 97517 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 288.8ms SsaConstructionTime, 2794.4ms SatisfiabilityAnalysisTime, 106475.4ms InterpolantComputationTime, 276 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 498 ConstructedInterpolants, 164 QuantifiedInterpolants, 11369 SizeOfPredicates, 225 NumberOfNonLiveVariables, 2830 ConjunctsInSsa, 391 ConjunctsInUnsatCore, 54 InterpolantComputations, 26 PerfectInterpolantSequences, 137/584 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