/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 15:57:22,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 15:57:22,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 15:57:22,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-07 15:57:22,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-07 15:57:22,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-07 15:57:22,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-07 15:57:22,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-07 15:57:22,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-07 15:57:22,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-07 15:57:22,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-07 15:57:22,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-07 15:57:22,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 15:57:22,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 15:57:22,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 15:57:22,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 15:57:22,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 15:57:22,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 15:57:22,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 15:57:22,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 15:57:22,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 15:57:22,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 15:57:22,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 15:57:22,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 15:57:22,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-07 15:57:22,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-07 15:57:22,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-07 15:57:22,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-07 15:57:22,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-07 15:57:22,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-07 15:57:22,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-07 15:57:22,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-07 15:57:22,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-07 15:57:22,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-07 15:57:22,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-07 15:57:22,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-07 15:57:22,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-07 15:57:22,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-07 15:57:22,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 15:57:22,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 15:57:22,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 15:57:22,136 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 15:57:22,189 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 15:57:22,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 15:57:22,191 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 15:57:22,191 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 15:57:22,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 15:57:22,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 15:57:22,196 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 15:57:22,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 15:57:22,196 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 15:57:22,197 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 15:57:22,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 15:57:22,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 15:57:22,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 15:57:22,198 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 15:57:22,199 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 15:57:22,199 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 15:57:22,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 15:57:22,199 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 15:57:22,200 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 15:57:22,200 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 15:57:22,200 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 15:57:22,201 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 15:57:22,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 15:57:22,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 15:57:22,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 15:57:22,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:57:22,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 15:57:22,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 15:57:22,202 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 15:57:22,203 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 15:57:22,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 15:57:22,203 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 15:57:22,204 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 15:57:22,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 15:57:22,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 15:57:22,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 15:57:22,675 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 15:57:22,676 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 15:57:22,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2021-10-07 15:57:22,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb64d92ed/4996a56b0c7b4c47938a9b0d4c57f69c/FLAG470d134da [2021-10-07 15:57:23,415 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 15:57:23,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2021-10-07 15:57:23,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb64d92ed/4996a56b0c7b4c47938a9b0d4c57f69c/FLAG470d134da [2021-10-07 15:57:23,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb64d92ed/4996a56b0c7b4c47938a9b0d4c57f69c [2021-10-07 15:57:23,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 15:57:23,782 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 15:57:23,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 15:57:23,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 15:57:23,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 15:57:23,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:57:23" (1/1) ... [2021-10-07 15:57:23,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e58320f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:57:23, skipping insertion in model container [2021-10-07 15:57:23,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:57:23" (1/1) ... [2021-10-07 15:57:23,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 15:57:23,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 15:57:24,024 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2079,2092] [2021-10-07 15:57:24,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:57:24,074 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-07 15:57:24,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 15:57:24,123 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2079,2092] [2021-10-07 15:57:24,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:57:24,154 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 15:57:24,209 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2079,2092] [2021-10-07 15:57:24,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:57:24,242 INFO L208 MainTranslator]: Completed translation [2021-10-07 15:57:24,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:57:24 WrapperNode [2021-10-07 15:57:24,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 15:57:24,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 15:57:24,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 15:57:24,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 15:57:24,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:57:24" (1/1) ... [2021-10-07 15:57:24,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:57:24" (1/1) ... [2021-10-07 15:57:24,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 15:57:24,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 15:57:24,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 15:57:24,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 15:57:24,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:57:24" (1/1) ... [2021-10-07 15:57:24,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:57:24" (1/1) ... [2021-10-07 15:57:24,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:57:24" (1/1) ... [2021-10-07 15:57:24,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:57:24" (1/1) ... [2021-10-07 15:57:24,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:57:24" (1/1) ... [2021-10-07 15:57:24,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:57:24" (1/1) ... [2021-10-07 15:57:24,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:57:24" (1/1) ... [2021-10-07 15:57:24,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 15:57:24,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 15:57:24,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 15:57:24,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 15:57:24,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:57:24" (1/1) ... [2021-10-07 15:57:24,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:57:24,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:57:24,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-07 15:57:24,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-07 15:57:24,461 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 15:57:24,462 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 15:57:24,462 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 15:57:24,462 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 15:57:24,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 15:57:24,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 15:57:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 15:57:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 15:57:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 15:57:24,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 15:57:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 15:57:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 15:57:24,465 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 15:57:24,983 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 15:57:24,983 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-07 15:57:24,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:57:24 BoogieIcfgContainer [2021-10-07 15:57:24,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 15:57:24,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 15:57:24,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 15:57:24,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 15:57:24,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:57:23" (1/3) ... [2021-10-07 15:57:24,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a9cf49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:57:24, skipping insertion in model container [2021-10-07 15:57:24,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:57:24" (2/3) ... [2021-10-07 15:57:24,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a9cf49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:57:24, skipping insertion in model container [2021-10-07 15:57:24,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:57:24" (3/3) ... [2021-10-07 15:57:25,000 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2021-10-07 15:57:25,007 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 15:57:25,007 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-10-07 15:57:25,008 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 15:57:25,075 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,076 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,077 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,077 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,077 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,077 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,077 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,078 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,080 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,080 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,080 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,080 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,081 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,081 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,082 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,082 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,083 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,084 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,084 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,084 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,089 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,089 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,089 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,090 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,090 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,091 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,092 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,092 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,093 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,094 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,094 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,095 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,095 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,096 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,096 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,096 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,097 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,097 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,097 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,097 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,098 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,098 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,098 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,098 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,099 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,099 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,099 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,100 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,100 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,100 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,100 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,101 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,101 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,102 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,102 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,102 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,102 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,102 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,103 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,103 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,107 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,108 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,108 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,108 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,109 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,121 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,121 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,121 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,121 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,123 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:57:25,140 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-07 15:57:25,228 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 15:57:25,243 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-07 15:57:25,243 INFO L340 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2021-10-07 15:57:25,270 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 15:57:25,282 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 125 transitions, 266 flow [2021-10-07 15:57:25,289 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 125 transitions, 266 flow [2021-10-07 15:57:25,291 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 123 places, 125 transitions, 266 flow [2021-10-07 15:57:25,387 INFO L129 PetriNetUnfolder]: 9/123 cut-off events. [2021-10-07 15:57:25,388 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-07 15:57:25,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 123 events. 9/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 141 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2021-10-07 15:57:25,400 INFO L116 LiptonReduction]: Number of co-enabled transitions 1036 [2021-10-07 15:57:41,667 INFO L131 LiptonReduction]: Checked pairs total: 1224 [2021-10-07 15:57:41,667 INFO L133 LiptonReduction]: Total number of compositions: 135 [2021-10-07 15:57:41,679 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 86 flow [2021-10-07 15:57:41,725 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 150 states, 106 states have (on average 3.452830188679245) internal successors, (366), 149 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 106 states have (on average 3.452830188679245) internal successors, (366), 149 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 15:57:41,744 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:57:41,745 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 15:57:41,746 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:57:41,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:57:41,755 INFO L82 PathProgramCache]: Analyzing trace with hash 15471, now seen corresponding path program 1 times [2021-10-07 15:57:41,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:57:41,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732248939] [2021-10-07 15:57:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:57:41,781 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:57:41,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:57:41,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:57:41,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 15:57:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:57:41,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 15:57:41,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:57:42,111 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-07 15:57:42,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-07 15:57:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:42,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:57:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:42,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:57:42,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732248939] [2021-10-07 15:57:42,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732248939] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:57:42,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:57:42,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 15:57:42,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223922908] [2021-10-07 15:57:42,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:57:42,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:57:42,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:57:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:57:42,686 INFO L87 Difference]: Start difference. First operand has 150 states, 106 states have (on average 3.452830188679245) internal successors, (366), 149 states have internal predecessors, (366), 0 states have call successors, (0), 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 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:57:42,799 INFO L93 Difference]: Finished difference Result 148 states and 364 transitions. [2021-10-07 15:57:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:57:42,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 15:57:42,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:57:42,815 INFO L225 Difference]: With dead ends: 148 [2021-10-07 15:57:42,815 INFO L226 Difference]: Without dead ends: 148 [2021-10-07 15:57:42,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:57:42,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-07 15:57:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-10-07 15:57:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 106 states have (on average 3.4339622641509435) internal successors, (364), 147 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 364 transitions. [2021-10-07 15:57:42,875 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 364 transitions. Word has length 2 [2021-10-07 15:57:42,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:57:42,876 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 364 transitions. [2021-10-07 15:57:42,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:42,877 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 364 transitions. [2021-10-07 15:57:42,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 15:57:42,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:57:42,878 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 15:57:42,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-07 15:57:43,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:57:43,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:57:43,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:57:43,092 INFO L82 PathProgramCache]: Analyzing trace with hash 15472, now seen corresponding path program 1 times [2021-10-07 15:57:43,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:57:43,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257116442] [2021-10-07 15:57:43,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:57:43,094 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:57:43,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:57:43,102 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:57:43,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 15:57:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:57:43,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:57:43,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:57:43,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:57:43,385 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:57:43,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:57:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:43,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:57:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:43,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:57:43,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257116442] [2021-10-07 15:57:43,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257116442] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:57:43,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:57:43,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:57:43,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124971752] [2021-10-07 15:57:43,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:57:43,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:57:43,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:57:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:57:43,600 INFO L87 Difference]: Start difference. First operand 148 states and 364 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:44,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:57:44,002 INFO L93 Difference]: Finished difference Result 295 states and 730 transitions. [2021-10-07 15:57:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:57:44,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 15:57:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:57:44,014 INFO L225 Difference]: With dead ends: 295 [2021-10-07 15:57:44,015 INFO L226 Difference]: Without dead ends: 295 [2021-10-07 15:57:44,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:57:44,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-10-07 15:57:44,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 150. [2021-10-07 15:57:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 108 states have (on average 3.4444444444444446) internal successors, (372), 149 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2021-10-07 15:57:44,054 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 2 [2021-10-07 15:57:44,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:57:44,054 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2021-10-07 15:57:44,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2021-10-07 15:57:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 15:57:44,055 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:57:44,055 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 15:57:44,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-07 15:57:44,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:57:44,270 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:57:44,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:57:44,271 INFO L82 PathProgramCache]: Analyzing trace with hash 15536, now seen corresponding path program 1 times [2021-10-07 15:57:44,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:57:44,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577804065] [2021-10-07 15:57:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:57:44,273 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:57:44,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:57:44,274 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:57:44,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 15:57:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:57:44,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:57:44,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:57:44,562 INFO L354 Elim1Store]: treesize reduction 151, result has 21.8 percent of original size [2021-10-07 15:57:44,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 76 [2021-10-07 15:57:44,588 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 125 treesize of output 121 [2021-10-07 15:57:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:45,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:57:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:45,057 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:57:45,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577804065] [2021-10-07 15:57:45,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577804065] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:57:45,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:57:45,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:57:45,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66835521] [2021-10-07 15:57:45,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:57:45,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:57:45,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:57:45,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:57:45,063 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:45,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:57:45,186 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2021-10-07 15:57:45,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:57:45,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 15:57:45,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:57:45,190 INFO L225 Difference]: With dead ends: 124 [2021-10-07 15:57:45,190 INFO L226 Difference]: Without dead ends: 124 [2021-10-07 15:57:45,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:57:45,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-07 15:57:45,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-10-07 15:57:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 92 states have (on average 3.1956521739130435) internal successors, (294), 123 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 294 transitions. [2021-10-07 15:57:45,214 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 294 transitions. Word has length 2 [2021-10-07 15:57:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:57:45,214 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 294 transitions. [2021-10-07 15:57:45,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 294 transitions. [2021-10-07 15:57:45,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 15:57:45,215 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:57:45,215 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 15:57:45,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 15:57:45,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:57:45,430 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:57:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:57:45,431 INFO L82 PathProgramCache]: Analyzing trace with hash 15538, now seen corresponding path program 1 times [2021-10-07 15:57:45,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:57:45,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410451975] [2021-10-07 15:57:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:57:45,433 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:57:45,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:57:45,434 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:57:45,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 15:57:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:57:45,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 15:57:45,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:57:45,721 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-07 15:57:45,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 118 [2021-10-07 15:57:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:47,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:57:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:47,241 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:57:47,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410451975] [2021-10-07 15:57:47,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410451975] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:57:47,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:57:47,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:57:47,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33897219] [2021-10-07 15:57:47,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:57:47,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:57:47,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:57:47,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:57:47,244 INFO L87 Difference]: Start difference. First operand 124 states and 294 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:47,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:57:47,337 INFO L93 Difference]: Finished difference Result 98 states and 216 transitions. [2021-10-07 15:57:47,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:57:47,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 15:57:47,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:57:47,339 INFO L225 Difference]: With dead ends: 98 [2021-10-07 15:57:47,339 INFO L226 Difference]: Without dead ends: 98 [2021-10-07 15:57:47,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:57:47,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-07 15:57:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-07 15:57:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 2.8421052631578947) internal successors, (216), 97 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:47,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 216 transitions. [2021-10-07 15:57:47,347 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 216 transitions. Word has length 2 [2021-10-07 15:57:47,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:57:47,347 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 216 transitions. [2021-10-07 15:57:47,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 216 transitions. [2021-10-07 15:57:47,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 15:57:47,348 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:57:47,348 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 15:57:47,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-07 15:57:47,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:57:47,572 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:57:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:57:47,574 INFO L82 PathProgramCache]: Analyzing trace with hash 14941376, now seen corresponding path program 1 times [2021-10-07 15:57:47,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:57:47,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784729089] [2021-10-07 15:57:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:57:47,575 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:57:47,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:57:47,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:57:47,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 15:57:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:57:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:57:47,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:57:47,802 INFO L354 Elim1Store]: treesize reduction 155, result has 19.7 percent of original size [2021-10-07 15:57:47,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 66 [2021-10-07 15:57:47,809 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 121 treesize of output 117 [2021-10-07 15:57:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:48,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:57:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:48,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:57:48,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784729089] [2021-10-07 15:57:48,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784729089] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:57:48,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:57:48,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:57:48,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378500090] [2021-10-07 15:57:48,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:57:48,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:57:48,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:57:48,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:57:48,555 INFO L87 Difference]: Start difference. First operand 98 states and 216 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:57:48,629 INFO L93 Difference]: Finished difference Result 88 states and 196 transitions. [2021-10-07 15:57:48,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:57:48,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 15:57:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:57:48,632 INFO L225 Difference]: With dead ends: 88 [2021-10-07 15:57:48,632 INFO L226 Difference]: Without dead ends: 88 [2021-10-07 15:57:48,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:57:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-07 15:57:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-10-07 15:57:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 72 states have (on average 2.7222222222222223) internal successors, (196), 87 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 196 transitions. [2021-10-07 15:57:48,637 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 196 transitions. Word has length 4 [2021-10-07 15:57:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:57:48,638 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 196 transitions. [2021-10-07 15:57:48,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 196 transitions. [2021-10-07 15:57:48,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 15:57:48,638 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:57:48,638 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 15:57:48,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-07 15:57:48,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:57:48,840 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:57:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:57:48,841 INFO L82 PathProgramCache]: Analyzing trace with hash 14941377, now seen corresponding path program 1 times [2021-10-07 15:57:48,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:57:48,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85753283] [2021-10-07 15:57:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:57:48,843 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:57:48,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:57:48,844 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:57:48,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 15:57:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:57:48,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 15:57:48,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:57:49,069 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-07 15:57:49,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-07 15:57:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:49,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:57:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:49,486 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:57:49,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85753283] [2021-10-07 15:57:49,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85753283] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:57:49,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:57:49,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 15:57:49,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948104458] [2021-10-07 15:57:49,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:57:49,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:57:49,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:57:49,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:57:49,490 INFO L87 Difference]: Start difference. First operand 88 states and 196 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:57:49,546 INFO L93 Difference]: Finished difference Result 78 states and 176 transitions. [2021-10-07 15:57:49,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:57:49,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 15:57:49,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:57:49,548 INFO L225 Difference]: With dead ends: 78 [2021-10-07 15:57:49,548 INFO L226 Difference]: Without dead ends: 78 [2021-10-07 15:57:49,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:57:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-07 15:57:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-10-07 15:57:49,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 2.588235294117647) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 176 transitions. [2021-10-07 15:57:49,561 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 176 transitions. Word has length 4 [2021-10-07 15:57:49,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:57:49,562 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 176 transitions. [2021-10-07 15:57:49,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 176 transitions. [2021-10-07 15:57:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 15:57:49,566 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:57:49,566 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 15:57:49,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 15:57:49,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:57:49,780 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:57:49,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:57:49,781 INFO L82 PathProgramCache]: Analyzing trace with hash 14933168, now seen corresponding path program 1 times [2021-10-07 15:57:49,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:57:49,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723439998] [2021-10-07 15:57:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:57:49,783 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:57:49,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:57:49,786 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:57:49,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 15:57:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:57:49,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:57:49,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:57:49,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:57:50,049 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:57:50,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:57:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:50,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:57:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:50,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:57:50,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723439998] [2021-10-07 15:57:50,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723439998] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:57:50,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:57:50,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 15:57:50,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792181537] [2021-10-07 15:57:50,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:57:50,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:57:50,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:57:50,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:57:50,643 INFO L87 Difference]: Start difference. First operand 78 states and 176 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:51,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:57:51,788 INFO L93 Difference]: Finished difference Result 447 states and 1024 transitions. [2021-10-07 15:57:51,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 15:57:51,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 15:57:51,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:57:51,804 INFO L225 Difference]: With dead ends: 447 [2021-10-07 15:57:51,804 INFO L226 Difference]: Without dead ends: 447 [2021-10-07 15:57:51,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 756.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:57:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-10-07 15:57:51,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 82. [2021-10-07 15:57:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 72 states have (on average 2.5555555555555554) internal successors, (184), 81 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 184 transitions. [2021-10-07 15:57:51,816 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 184 transitions. Word has length 4 [2021-10-07 15:57:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:57:51,817 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 184 transitions. [2021-10-07 15:57:51,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 184 transitions. [2021-10-07 15:57:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 15:57:51,817 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:57:51,817 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 15:57:51,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-07 15:57:52,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:57:52,030 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:57:52,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:57:52,031 INFO L82 PathProgramCache]: Analyzing trace with hash 463178619, now seen corresponding path program 1 times [2021-10-07 15:57:52,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:57:52,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403818120] [2021-10-07 15:57:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:57:52,033 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:57:52,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:57:52,034 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:57:52,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 15:57:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:57:52,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:57:52,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:57:52,227 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-07 15:57:52,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-07 15:57:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:52,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:57:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:52,637 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:57:52,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403818120] [2021-10-07 15:57:52,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403818120] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:57:52,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:57:52,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-07 15:57:52,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837180584] [2021-10-07 15:57:52,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:57:52,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:57:52,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:57:52,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:57:52,639 INFO L87 Difference]: Start difference. First operand 82 states and 184 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:57:52,709 INFO L93 Difference]: Finished difference Result 60 states and 131 transitions. [2021-10-07 15:57:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:57:52,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 15:57:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:57:52,712 INFO L225 Difference]: With dead ends: 60 [2021-10-07 15:57:52,712 INFO L226 Difference]: Without dead ends: 60 [2021-10-07 15:57:52,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 15:57:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-07 15:57:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-07 15:57:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 2.381818181818182) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:52,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 131 transitions. [2021-10-07 15:57:52,716 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 131 transitions. Word has length 5 [2021-10-07 15:57:52,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:57:52,717 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 131 transitions. [2021-10-07 15:57:52,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 131 transitions. [2021-10-07 15:57:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 15:57:52,718 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:57:52,718 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 15:57:52,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-07 15:57:52,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:57:52,922 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:57:52,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:57:52,923 INFO L82 PathProgramCache]: Analyzing trace with hash 463178620, now seen corresponding path program 1 times [2021-10-07 15:57:52,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:57:52,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426827370] [2021-10-07 15:57:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:57:52,924 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:57:52,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:57:52,925 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:57:52,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 15:57:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:57:52,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:57:52,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:57:53,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:57:53,150 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:57:53,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:57:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:53,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:57:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:53,565 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:57:53,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426827370] [2021-10-07 15:57:53,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426827370] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:57:53,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:57:53,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 15:57:53,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111346867] [2021-10-07 15:57:53,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:57:53,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:57:53,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:57:53,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:57:53,567 INFO L87 Difference]: Start difference. First operand 60 states and 131 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:53,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:57:53,900 INFO L93 Difference]: Finished difference Result 100 states and 231 transitions. [2021-10-07 15:57:53,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 15:57:53,902 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 15:57:53,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:57:53,903 INFO L225 Difference]: With dead ends: 100 [2021-10-07 15:57:53,903 INFO L226 Difference]: Without dead ends: 100 [2021-10-07 15:57:53,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:57:53,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-07 15:57:53,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-10-07 15:57:53,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 2.6533333333333333) internal successors, (199), 79 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:53,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2021-10-07 15:57:53,908 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 5 [2021-10-07 15:57:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:57:53,908 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2021-10-07 15:57:53,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:53,909 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2021-10-07 15:57:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 15:57:53,909 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:57:53,909 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-07 15:57:53,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 15:57:54,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:57:54,110 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:57:54,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:57:54,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1561861828, now seen corresponding path program 1 times [2021-10-07 15:57:54,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:57:54,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412191003] [2021-10-07 15:57:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:57:54,113 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:57:54,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:57:54,114 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:57:54,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-07 15:57:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:57:54,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 15:57:54,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:57:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:57:54,377 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:57:54,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:57:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:54,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:57:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:55,268 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:57:55,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412191003] [2021-10-07 15:57:55,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412191003] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:57:55,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:57:55,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:57:55,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801818852] [2021-10-07 15:57:55,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 15:57:55,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:57:55,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 15:57:55,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:57:55,270 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:57,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:57:57,503 INFO L93 Difference]: Finished difference Result 262 states and 585 transitions. [2021-10-07 15:57:57,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:57:57,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 15:57:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:57:57,508 INFO L225 Difference]: With dead ends: 262 [2021-10-07 15:57:57,508 INFO L226 Difference]: Without dead ends: 262 [2021-10-07 15:57:57,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1387.8ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:57:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-07 15:57:57,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 132. [2021-10-07 15:57:57,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 2.543307086614173) internal successors, (323), 131 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 323 transitions. [2021-10-07 15:57:57,516 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 323 transitions. Word has length 7 [2021-10-07 15:57:57,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:57:57,517 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 323 transitions. [2021-10-07 15:57:57,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 323 transitions. [2021-10-07 15:57:57,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 15:57:57,518 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:57:57,518 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:57:57,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-07 15:57:57,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:57:57,729 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:57:57,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:57:57,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1557781783, now seen corresponding path program 1 times [2021-10-07 15:57:57,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:57:57,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509943356] [2021-10-07 15:57:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:57:57,731 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:57:57,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:57:57,732 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:57:57,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-07 15:57:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:57:57,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:57:57,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:57:57,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:57:57,996 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:57:57,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:57:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:58,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:57:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:58,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:57:58,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509943356] [2021-10-07 15:57:58,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509943356] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:57:58,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:57:58,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 15:57:58,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934792485] [2021-10-07 15:57:58,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:57:58,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:57:58,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:57:58,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:57:58,441 INFO L87 Difference]: Start difference. First operand 132 states and 323 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) [2021-10-07 15:57:58,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:57:58,765 INFO L93 Difference]: Finished difference Result 184 states and 479 transitions. [2021-10-07 15:57:58,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 15:57:58,766 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 [2021-10-07 15:57:58,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:57:58,768 INFO L225 Difference]: With dead ends: 184 [2021-10-07 15:57:58,769 INFO L226 Difference]: Without dead ends: 184 [2021-10-07 15:57:58,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 302.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:57:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-07 15:57:58,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 164. [2021-10-07 15:57:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 2.79874213836478) internal successors, (445), 163 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:57:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 445 transitions. [2021-10-07 15:57:58,777 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 445 transitions. Word has length 7 [2021-10-07 15:57:58,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:57:58,777 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 445 transitions. [2021-10-07 15:57:58,777 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) [2021-10-07 15:57:58,777 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 445 transitions. [2021-10-07 15:57:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 15:57:58,778 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:57:58,779 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-07 15:57:58,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-07 15:57:58,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:57:58,991 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:57:58,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:57:58,992 INFO L82 PathProgramCache]: Analyzing trace with hash 16379184, now seen corresponding path program 2 times [2021-10-07 15:57:58,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:57:58,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011354385] [2021-10-07 15:57:58,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:57:58,993 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:57:58,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:57:58,994 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:57:59,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-07 15:57:59,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:57:59,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:57:59,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-07 15:57:59,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:57:59,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:57:59,279 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:57:59,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:57:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:57:59,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:58:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:58:01,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:58:01,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011354385] [2021-10-07 15:58:01,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011354385] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:58:01,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:58:01,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 15:58:01,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330384420] [2021-10-07 15:58:01,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:58:01,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:58:01,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:58:01,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:58:01,257 INFO L87 Difference]: Start difference. First operand 164 states and 445 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:07,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:58:07,975 INFO L93 Difference]: Finished difference Result 1351 states and 3871 transitions. [2021-10-07 15:58:07,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:58:07,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 15:58:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:58:07,992 INFO L225 Difference]: With dead ends: 1351 [2021-10-07 15:58:07,992 INFO L226 Difference]: Without dead ends: 1351 [2021-10-07 15:58:07,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5603.8ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:58:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-10-07 15:58:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 172. [2021-10-07 15:58:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 2.7604790419161676) internal successors, (461), 171 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 461 transitions. [2021-10-07 15:58:08,017 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 461 transitions. Word has length 8 [2021-10-07 15:58:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:58:08,017 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 461 transitions. [2021-10-07 15:58:08,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 461 transitions. [2021-10-07 15:58:08,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 15:58:08,018 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:58:08,019 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-10-07 15:58:08,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-07 15:58:08,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:58:08,231 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:58:08,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:58:08,232 INFO L82 PathProgramCache]: Analyzing trace with hash -681696276, now seen corresponding path program 1 times [2021-10-07 15:58:08,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:58:08,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857280572] [2021-10-07 15:58:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:58:08,233 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:58:08,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:58:08,234 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:58:08,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-07 15:58:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:58:08,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 15:58:08,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:58:08,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:58:08,541 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:58:08,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:58:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:58:08,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:58:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:58:09,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:58:09,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857280572] [2021-10-07 15:58:09,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857280572] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:58:09,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:58:09,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2021-10-07 15:58:09,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703671869] [2021-10-07 15:58:09,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:58:09,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:58:09,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:58:09,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:58:09,913 INFO L87 Difference]: Start difference. First operand 172 states and 461 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:11,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:58:11,325 INFO L93 Difference]: Finished difference Result 274 states and 676 transitions. [2021-10-07 15:58:11,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:58:11,326 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 15:58:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:58:11,328 INFO L225 Difference]: With dead ends: 274 [2021-10-07 15:58:11,328 INFO L226 Difference]: Without dead ends: 274 [2021-10-07 15:58:11,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1442.2ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:58:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-07 15:58:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 184. [2021-10-07 15:58:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 2.7709497206703912) internal successors, (496), 183 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 496 transitions. [2021-10-07 15:58:11,338 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 496 transitions. Word has length 9 [2021-10-07 15:58:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:58:11,338 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 496 transitions. [2021-10-07 15:58:11,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 496 transitions. [2021-10-07 15:58:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 15:58:11,339 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:58:11,340 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-10-07 15:58:11,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-07 15:58:11,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:58:11,552 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:58:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:58:11,553 INFO L82 PathProgramCache]: Analyzing trace with hash 746481916, now seen corresponding path program 2 times [2021-10-07 15:58:11,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:58:11,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316760671] [2021-10-07 15:58:11,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:58:11,554 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:58:11,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:58:11,555 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:58:11,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-07 15:58:11,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:58:11,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:58:11,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 15:58:11,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:58:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:58:11,884 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:58:11,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:58:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:58:12,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:58:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:58:12,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:58:12,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316760671] [2021-10-07 15:58:12,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316760671] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:58:12,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:58:12,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:58:12,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509907532] [2021-10-07 15:58:12,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:58:12,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:58:12,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:58:12,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:58:12,887 INFO L87 Difference]: Start difference. First operand 184 states and 496 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:58:15,127 INFO L93 Difference]: Finished difference Result 382 states and 977 transitions. [2021-10-07 15:58:15,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:58:15,129 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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 9 [2021-10-07 15:58:15,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:58:15,132 INFO L225 Difference]: With dead ends: 382 [2021-10-07 15:58:15,133 INFO L226 Difference]: Without dead ends: 382 [2021-10-07 15:58:15,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1954.3ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:58:15,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-10-07 15:58:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 240. [2021-10-07 15:58:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 2.9957446808510637) internal successors, (704), 239 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 704 transitions. [2021-10-07 15:58:15,144 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 704 transitions. Word has length 9 [2021-10-07 15:58:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:58:15,144 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 704 transitions. [2021-10-07 15:58:15,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 704 transitions. [2021-10-07 15:58:15,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 15:58:15,146 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:58:15,146 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:58:15,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-07 15:58:15,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:58:15,359 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:58:15,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:58:15,360 INFO L82 PathProgramCache]: Analyzing trace with hash -31824889, now seen corresponding path program 1 times [2021-10-07 15:58:15,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:58:15,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778497019] [2021-10-07 15:58:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:58:15,361 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:58:15,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:58:15,363 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:58:15,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-07 15:58:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:58:15,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 15:58:15,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:58:15,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:58:15,663 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:58:15,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:58:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:58:15,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:58:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:58:16,825 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:58:16,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778497019] [2021-10-07 15:58:16,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778497019] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:58:16,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:58:16,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-07 15:58:16,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949988196] [2021-10-07 15:58:16,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 15:58:16,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:58:16,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 15:58:16,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:58:16,827 INFO L87 Difference]: Start difference. First operand 240 states and 704 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) 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) [2021-10-07 15:58:18,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:58:18,068 INFO L93 Difference]: Finished difference Result 282 states and 740 transitions. [2021-10-07 15:58:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:58:18,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) 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 [2021-10-07 15:58:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:58:18,071 INFO L225 Difference]: With dead ends: 282 [2021-10-07 15:58:18,072 INFO L226 Difference]: Without dead ends: 282 [2021-10-07 15:58:18,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1172.4ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:58:18,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-10-07 15:58:18,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 236. [2021-10-07 15:58:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 2.9134199134199132) internal successors, (673), 235 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 673 transitions. [2021-10-07 15:58:18,083 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 673 transitions. Word has length 10 [2021-10-07 15:58:18,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:58:18,083 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 673 transitions. [2021-10-07 15:58:18,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) 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) [2021-10-07 15:58:18,084 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 673 transitions. [2021-10-07 15:58:18,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 15:58:18,085 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:58:18,085 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:58:18,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-07 15:58:18,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:58:18,298 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:58:18,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:58:18,299 INFO L82 PathProgramCache]: Analyzing trace with hash -264413431, now seen corresponding path program 2 times [2021-10-07 15:58:18,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:58:18,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046702579] [2021-10-07 15:58:18,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:58:18,300 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:58:18,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:58:18,302 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:58:18,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-07 15:58:18,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:58:18,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:58:18,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 15:58:18,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:58:18,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:58:18,678 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:58:18,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:58:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:58:18,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:58:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:58:19,864 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:58:19,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046702579] [2021-10-07 15:58:19,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046702579] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:58:19,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:58:19,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:58:19,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516080220] [2021-10-07 15:58:19,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:58:19,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:58:19,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:58:19,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:58:19,866 INFO L87 Difference]: Start difference. First operand 236 states and 673 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) [2021-10-07 15:58:22,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:58:22,191 INFO L93 Difference]: Finished difference Result 456 states and 1278 transitions. [2021-10-07 15:58:22,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:58:22,193 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 11 [2021-10-07 15:58:22,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:58:22,198 INFO L225 Difference]: With dead ends: 456 [2021-10-07 15:58:22,198 INFO L226 Difference]: Without dead ends: 456 [2021-10-07 15:58:22,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2187.6ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:58:22,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-10-07 15:58:22,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 324. [2021-10-07 15:58:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 319 states have (on average 3.2131661442006267) internal successors, (1025), 323 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:22,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1025 transitions. [2021-10-07 15:58:22,213 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1025 transitions. Word has length 11 [2021-10-07 15:58:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:58:22,213 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1025 transitions. [2021-10-07 15:58:22,214 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) [2021-10-07 15:58:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1025 transitions. [2021-10-07 15:58:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 15:58:22,215 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:58:22,215 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2021-10-07 15:58:22,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-07 15:58:22,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:58:22,429 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:58:22,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:58:22,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1985092484, now seen corresponding path program 3 times [2021-10-07 15:58:22,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:58:22,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357647254] [2021-10-07 15:58:22,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:58:22,431 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:58:22,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:58:22,432 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:58:22,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-07 15:58:22,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:58:22,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:58:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 15:58:22,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:58:22,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:58:22,965 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:58:22,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:58:23,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-07 15:58:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:58:23,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:58:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:58:23,629 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:58:23,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357647254] [2021-10-07 15:58:23,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357647254] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:58:23,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:58:23,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-07 15:58:23,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576481319] [2021-10-07 15:58:23,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:58:23,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:58:23,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:58:23,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:58:23,631 INFO L87 Difference]: Start difference. First operand 324 states and 1025 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:58:25,240 INFO L93 Difference]: Finished difference Result 477 states and 1413 transitions. [2021-10-07 15:58:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-07 15:58:25,241 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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 [2021-10-07 15:58:25,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:58:25,246 INFO L225 Difference]: With dead ends: 477 [2021-10-07 15:58:25,247 INFO L226 Difference]: Without dead ends: 477 [2021-10-07 15:58:25,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 854.5ms TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:58:25,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-10-07 15:58:25,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 411. [2021-10-07 15:58:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 406 states have (on average 3.1699507389162562) internal successors, (1287), 410 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1287 transitions. [2021-10-07 15:58:25,263 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1287 transitions. Word has length 13 [2021-10-07 15:58:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:58:25,264 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1287 transitions. [2021-10-07 15:58:25,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1287 transitions. [2021-10-07 15:58:25,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:58:25,265 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:58:25,265 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:58:25,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-07 15:58:25,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:58:25,480 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:58:25,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:58:25,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1888342841, now seen corresponding path program 1 times [2021-10-07 15:58:25,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:58:25,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971262007] [2021-10-07 15:58:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:58:25,482 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:58:25,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:58:25,484 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:58:25,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-07 15:58:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:58:25,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:58:25,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:58:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:58:25,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:58:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:58:25,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:58:25,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971262007] [2021-10-07 15:58:25,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971262007] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:58:25,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:58:25,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 15:58:25,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616499801] [2021-10-07 15:58:25,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:58:25,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:58:25,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:58:25,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:58:25,712 INFO L87 Difference]: Start difference. First operand 411 states and 1287 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:58:25,738 INFO L93 Difference]: Finished difference Result 456 states and 1368 transitions. [2021-10-07 15:58:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:58:25,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 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 14 [2021-10-07 15:58:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:58:25,742 INFO L225 Difference]: With dead ends: 456 [2021-10-07 15:58:25,742 INFO L226 Difference]: Without dead ends: 424 [2021-10-07 15:58:25,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:58:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-10-07 15:58:25,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 418. [2021-10-07 15:58:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 413 states have (on average 3.12590799031477) internal successors, (1291), 417 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:25,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1291 transitions. [2021-10-07 15:58:25,758 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1291 transitions. Word has length 14 [2021-10-07 15:58:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:58:25,758 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1291 transitions. [2021-10-07 15:58:25,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1291 transitions. [2021-10-07 15:58:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:58:25,759 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:58:25,759 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1] [2021-10-07 15:58:25,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-07 15:58:25,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:58:25,973 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:58:25,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:58:25,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1046868538, now seen corresponding path program 4 times [2021-10-07 15:58:25,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:58:25,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908338468] [2021-10-07 15:58:25,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:58:25,974 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:58:25,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:58:25,975 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:58:26,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-07 15:58:26,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:58:26,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:58:26,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 15:58:26,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:58:26,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:58:26,356 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:58:26,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:58:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:58:26,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:58:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:58:29,597 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:58:29,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908338468] [2021-10-07 15:58:29,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908338468] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:58:29,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:58:29,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2021-10-07 15:58:29,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289402911] [2021-10-07 15:58:29,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-07 15:58:29,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:58:29,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-07 15:58:29,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:58:29,599 INFO L87 Difference]: Start difference. First operand 418 states and 1291 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:34,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:58:34,191 INFO L93 Difference]: Finished difference Result 853 states and 2421 transitions. [2021-10-07 15:58:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:58:34,192 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 15:58:34,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:58:34,197 INFO L225 Difference]: With dead ends: 853 [2021-10-07 15:58:34,197 INFO L226 Difference]: Without dead ends: 853 [2021-10-07 15:58:34,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 4389.0ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:58:34,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-10-07 15:58:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 509. [2021-10-07 15:58:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 504 states have (on average 3.2202380952380953) internal successors, (1623), 508 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1623 transitions. [2021-10-07 15:58:34,221 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1623 transitions. Word has length 14 [2021-10-07 15:58:34,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:58:34,221 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 1623 transitions. [2021-10-07 15:58:34,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:34,221 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1623 transitions. [2021-10-07 15:58:34,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:58:34,223 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:58:34,223 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:58:34,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-07 15:58:34,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:58:34,437 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:58:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:58:34,438 INFO L82 PathProgramCache]: Analyzing trace with hash -944635959, now seen corresponding path program 3 times [2021-10-07 15:58:34,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:58:34,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259231445] [2021-10-07 15:58:34,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:58:34,440 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:58:34,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:58:34,441 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:58:34,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-07 15:58:34,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:58:34,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:58:34,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-07 15:58:34,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:58:34,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:58:35,049 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:58:35,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:58:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:58:35,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:58:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:58:37,840 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:58:37,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259231445] [2021-10-07 15:58:37,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259231445] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:58:37,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:58:37,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 20 [2021-10-07 15:58:37,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757593031] [2021-10-07 15:58:37,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-07 15:58:37,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:58:37,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-07 15:58:37,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-10-07 15:58:37,842 INFO L87 Difference]: Start difference. First operand 509 states and 1623 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:58:48,494 INFO L93 Difference]: Finished difference Result 771 states and 2052 transitions. [2021-10-07 15:58:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:58:48,499 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 15:58:48,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:58:48,504 INFO L225 Difference]: With dead ends: 771 [2021-10-07 15:58:48,504 INFO L226 Difference]: Without dead ends: 771 [2021-10-07 15:58:48,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 6381.8ms TimeCoverageRelationStatistics Valid=268, Invalid=1138, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:58:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-10-07 15:58:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 525. [2021-10-07 15:58:48,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 520 states have (on average 3.1365384615384615) internal successors, (1631), 524 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1631 transitions. [2021-10-07 15:58:48,526 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1631 transitions. Word has length 15 [2021-10-07 15:58:48,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:58:48,527 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1631 transitions. [2021-10-07 15:58:48,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:58:48,527 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1631 transitions. [2021-10-07 15:58:48,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:58:48,529 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:58:48,529 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1] [2021-10-07 15:58:48,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-07 15:58:48,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:58:48,744 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:58:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:58:48,745 INFO L82 PathProgramCache]: Analyzing trace with hash 548379708, now seen corresponding path program 5 times [2021-10-07 15:58:48,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:58:48,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725367742] [2021-10-07 15:58:48,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:58:48,754 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:58:48,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:58:48,755 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:58:48,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-07 15:58:49,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:58:49,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:58:49,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 15:58:49,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:58:49,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:58:49,220 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:58:49,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:58:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:58:49,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:58:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:58:52,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:58:52,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725367742] [2021-10-07 15:58:52,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725367742] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:58:52,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:58:52,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2021-10-07 15:58:52,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014128713] [2021-10-07 15:58:52,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:58:52,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:58:52,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:58:52,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:58:52,952 INFO L87 Difference]: Start difference. First operand 525 states and 1631 transitions. Second operand has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 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) [2021-10-07 15:59:16,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:59:16,591 INFO L93 Difference]: Finished difference Result 1930 states and 5562 transitions. [2021-10-07 15:59:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-07 15:59:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 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 [2021-10-07 15:59:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:59:16,605 INFO L225 Difference]: With dead ends: 1930 [2021-10-07 15:59:16,605 INFO L226 Difference]: Without dead ends: 1930 [2021-10-07 15:59:16,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 17391.5ms TimeCoverageRelationStatistics Valid=622, Invalid=2570, Unknown=0, NotChecked=0, Total=3192 [2021-10-07 15:59:16,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-10-07 15:59:16,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 645. [2021-10-07 15:59:16,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 640 states have (on average 3.1609375) internal successors, (2023), 644 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:59:16,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2023 transitions. [2021-10-07 15:59:16,642 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2023 transitions. Word has length 15 [2021-10-07 15:59:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:59:16,643 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 2023 transitions. [2021-10-07 15:59:16,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 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) [2021-10-07 15:59:16,643 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2023 transitions. [2021-10-07 15:59:16,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:59:16,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:59:16,645 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:59:16,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-07 15:59:16,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:59:16,860 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:59:16,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:59:16,860 INFO L82 PathProgramCache]: Analyzing trace with hash 43811863, now seen corresponding path program 1 times [2021-10-07 15:59:16,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:59:16,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593993668] [2021-10-07 15:59:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:59:16,862 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:59:16,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:59:16,863 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:59:16,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-07 15:59:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:59:17,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:59:17,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:59:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:59:17,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:59:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:59:17,315 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:59:17,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593993668] [2021-10-07 15:59:17,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593993668] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:59:17,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:59:17,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-07 15:59:17,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860720287] [2021-10-07 15:59:17,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 15:59:17,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:59:17,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 15:59:17,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:59:17,317 INFO L87 Difference]: Start difference. First operand 645 states and 2023 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-10-07 15:59:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:59:17,752 INFO L93 Difference]: Finished difference Result 907 states and 2766 transitions. [2021-10-07 15:59:17,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:59:17,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 16 [2021-10-07 15:59:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:59:17,758 INFO L225 Difference]: With dead ends: 907 [2021-10-07 15:59:17,759 INFO L226 Difference]: Without dead ends: 907 [2021-10-07 15:59:17,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:59:17,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-10-07 15:59:17,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 667. [2021-10-07 15:59:17,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 662 states have (on average 3.197885196374622) internal successors, (2117), 666 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:59:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2117 transitions. [2021-10-07 15:59:17,782 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2117 transitions. Word has length 16 [2021-10-07 15:59:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:59:17,782 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 2117 transitions. [2021-10-07 15:59:17,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-10-07 15:59:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2117 transitions. [2021-10-07 15:59:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:59:17,785 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:59:17,785 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:59:17,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-07 15:59:17,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:59:17,998 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:59:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:59:18,000 INFO L82 PathProgramCache]: Analyzing trace with hash -976849226, now seen corresponding path program 1 times [2021-10-07 15:59:18,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:59:18,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117777861] [2021-10-07 15:59:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:59:18,001 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:59:18,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:59:18,002 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:59:18,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-07 15:59:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:59:18,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:59:18,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:59:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:59:18,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:59:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:59:18,402 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:59:18,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117777861] [2021-10-07 15:59:18,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117777861] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 15:59:18,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:59:18,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-10-07 15:59:18,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032872843] [2021-10-07 15:59:18,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 15:59:18,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:59:18,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 15:59:18,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:59:18,404 INFO L87 Difference]: Start difference. First operand 667 states and 2117 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:59:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:59:18,489 INFO L93 Difference]: Finished difference Result 705 states and 2166 transitions. [2021-10-07 15:59:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:59:18,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 16 [2021-10-07 15:59:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:59:18,494 INFO L225 Difference]: With dead ends: 705 [2021-10-07 15:59:18,495 INFO L226 Difference]: Without dead ends: 705 [2021-10-07 15:59:18,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-07 15:59:18,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-10-07 15:59:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 679. [2021-10-07 15:59:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 674 states have (on average 3.1468842729970326) internal successors, (2121), 678 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:59:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2121 transitions. [2021-10-07 15:59:18,516 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2121 transitions. Word has length 16 [2021-10-07 15:59:18,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:59:18,516 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2121 transitions. [2021-10-07 15:59:18,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:59:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2121 transitions. [2021-10-07 15:59:18,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:59:18,518 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:59:18,518 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:59:18,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-07 15:59:18,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:59:18,732 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:59:18,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:59:18,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1806878423, now seen corresponding path program 2 times [2021-10-07 15:59:18,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:59:18,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781576419] [2021-10-07 15:59:18,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:59:18,734 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:59:18,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:59:18,735 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:59:18,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-07 15:59:18,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:59:18,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:59:18,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:59:18,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:59:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:59:19,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:59:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:59:19,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:59:19,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781576419] [2021-10-07 15:59:19,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781576419] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:59:19,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:59:19,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-07 15:59:19,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550114748] [2021-10-07 15:59:19,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 15:59:19,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:59:19,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 15:59:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:59:19,330 INFO L87 Difference]: Start difference. First operand 679 states and 2121 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-10-07 15:59:19,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:59:19,952 INFO L93 Difference]: Finished difference Result 1079 states and 3224 transitions. [2021-10-07 15:59:19,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:59:19,953 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 16 [2021-10-07 15:59:19,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:59:19,959 INFO L225 Difference]: With dead ends: 1079 [2021-10-07 15:59:19,959 INFO L226 Difference]: Without dead ends: 1079 [2021-10-07 15:59:19,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:59:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-10-07 15:59:19,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 725. [2021-10-07 15:59:19,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 720 states have (on average 3.1791666666666667) internal successors, (2289), 724 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:59:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 2289 transitions. [2021-10-07 15:59:19,985 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 2289 transitions. Word has length 16 [2021-10-07 15:59:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:59:19,986 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 2289 transitions. [2021-10-07 15:59:19,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-10-07 15:59:19,986 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 2289 transitions. [2021-10-07 15:59:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:59:19,988 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:59:19,988 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:59:20,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-07 15:59:20,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:59:20,203 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:59:20,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:59:20,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1175328225, now seen corresponding path program 3 times [2021-10-07 15:59:20,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:59:20,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487808715] [2021-10-07 15:59:20,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:59:20,205 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:59:20,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:59:20,206 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:59:20,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-07 15:59:20,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:59:20,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:59:20,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:59:20,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:59:20,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:59:20,651 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:59:20,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:59:20,713 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 13 treesize of output 9 [2021-10-07 15:59:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:59:20,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:59:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:59:20,920 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:59:20,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487808715] [2021-10-07 15:59:20,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487808715] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 15:59:20,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:59:20,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-10-07 15:59:20,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925824036] [2021-10-07 15:59:20,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 15:59:20,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:59:20,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 15:59:20,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:59:20,922 INFO L87 Difference]: Start difference. First operand 725 states and 2289 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:59:21,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:59:21,022 INFO L93 Difference]: Finished difference Result 751 states and 2276 transitions. [2021-10-07 15:59:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:59:21,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 16 [2021-10-07 15:59:21,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:59:21,028 INFO L225 Difference]: With dead ends: 751 [2021-10-07 15:59:21,028 INFO L226 Difference]: Without dead ends: 751 [2021-10-07 15:59:21,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-07 15:59:21,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-10-07 15:59:21,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 689. [2021-10-07 15:59:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 684 states have (on average 3.0921052631578947) internal successors, (2115), 688 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:59:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 2115 transitions. [2021-10-07 15:59:21,049 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 2115 transitions. Word has length 16 [2021-10-07 15:59:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:59:21,049 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 2115 transitions. [2021-10-07 15:59:21,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:59:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 2115 transitions. [2021-10-07 15:59:21,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:59:21,052 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:59:21,052 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-07 15:59:21,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-07 15:59:21,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:59:21,265 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:59:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:59:21,266 INFO L82 PathProgramCache]: Analyzing trace with hash -506376656, now seen corresponding path program 3 times [2021-10-07 15:59:21,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:59:21,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995514666] [2021-10-07 15:59:21,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:59:21,268 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:59:21,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:59:21,269 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:59:21,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-07 15:59:21,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-07 15:59:21,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:59:21,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 15:59:21,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:59:21,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:59:21,907 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-07 15:59:21,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-07 15:59:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:59:22,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:59:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:59:29,330 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:59:29,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995514666] [2021-10-07 15:59:29,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995514666] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:59:29,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:59:29,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 15:59:29,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670181823] [2021-10-07 15:59:29,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 15:59:29,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:59:29,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 15:59:29,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:59:29,333 INFO L87 Difference]: Start difference. First operand 689 states and 2115 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:59:40,513 WARN L207 SmtUtils]: Spent 8.40 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-07 15:59:48,861 WARN L207 SmtUtils]: Spent 7.38 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-07 16:00:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:00:24,729 INFO L93 Difference]: Finished difference Result 7002 states and 22817 transitions. [2021-10-07 16:00:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 16:00:24,731 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 16:00:24,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:00:24,804 INFO L225 Difference]: With dead ends: 7002 [2021-10-07 16:00:24,804 INFO L226 Difference]: Without dead ends: 7002 [2021-10-07 16:00:24,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 52164.3ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 16:00:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7002 states. [2021-10-07 16:00:24,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7002 to 705. [2021-10-07 16:00:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 700 states have (on average 3.067142857142857) internal successors, (2147), 704 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:00:24,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2147 transitions. [2021-10-07 16:00:24,876 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2147 transitions. Word has length 16 [2021-10-07 16:00:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:00:24,876 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 2147 transitions. [2021-10-07 16:00:24,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:00:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2147 transitions. [2021-10-07 16:00:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 16:00:24,878 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:00:24,878 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:00:24,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-07 16:00:25,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:00:25,093 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 16:00:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:00:25,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1358656296, now seen corresponding path program 1 times [2021-10-07 16:00:25,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:00:25,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134217060] [2021-10-07 16:00:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:00:25,096 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:00:25,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:00:25,097 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:00:25,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-07 16:00:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:00:25,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:00:25,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:00:25,422 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 47 treesize of output 45 [2021-10-07 16:00:25,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:00:25,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:00:25,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:00:25,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:00:25,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:00:25,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:00:25,866 INFO L354 Elim1Store]: treesize reduction 923, result has 6.4 percent of original size [2021-10-07 16:00:25,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 66 treesize of output 86 [2021-10-07 16:00:32,438 INFO L354 Elim1Store]: treesize reduction 282, result has 0.4 percent of original size [2021-10-07 16:00:32,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 93 treesize of output 39 [2021-10-07 16:00:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:00:32,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:00:36,668 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-10-07 16:00:36,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 11357647338 treesize of output 6475477522 Received shutdown request... [2021-10-07 16:11:44,758 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:11:44,758 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:11:44,791 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:11:44,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-07 16:11:45,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:11:45,006 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. [2021-10-07 16:11:45,009 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:11:45,009 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:11:45,009 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:11:45,009 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:11:45,009 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 16:11:45,010 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 16:11:45,010 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 16:11:45,010 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 16:11:45,010 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 16:11:45,010 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 16:11:45,010 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 16:11:45,011 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 16:11:45,011 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-07 16:11:45,011 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-07 16:11:45,011 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:11:45,011 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 16:11:45,011 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 16:11:45,012 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:11:45,012 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:11:45,012 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:11:45,012 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:11:45,022 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 16:11:45,022 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 16:11:45,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 04:11:45 BasicIcfg [2021-10-07 16:11:45,024 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 16:11:45,025 INFO L168 Benchmark]: Toolchain (without parser) took 861250.22 ms. Allocated memory was 151.0 MB in the beginning and 549.5 MB in the end (delta: 398.5 MB). Free memory was 125.3 MB in the beginning and 293.1 MB in the end (delta: -167.9 MB). Peak memory consumption was 357.5 MB. Max. memory is 8.0 GB. [2021-10-07 16:11:45,025 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 122.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 16:11:45,026 INFO L168 Benchmark]: CACSL2BoogieTranslator took 459.95 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 112.5 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:11:45,026 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.47 ms. Allocated memory is still 151.0 MB. Free memory was 112.3 MB in the beginning and 110.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:11:45,027 INFO L168 Benchmark]: Boogie Preprocessor took 40.40 ms. Allocated memory is still 151.0 MB. Free memory was 110.8 MB in the beginning and 109.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-07 16:11:45,027 INFO L168 Benchmark]: RCFGBuilder took 643.20 ms. Allocated memory is still 151.0 MB. Free memory was 109.2 MB in the beginning and 127.8 MB in the end (delta: -18.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:11:45,028 INFO L168 Benchmark]: TraceAbstraction took 860033.35 ms. Allocated memory was 151.0 MB in the beginning and 549.5 MB in the end (delta: 398.5 MB). Free memory was 127.3 MB in the beginning and 293.1 MB in the end (delta: -165.8 MB). Peak memory consumption was 359.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:11:45,030 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 151.0 MB. Free memory is still 122.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 459.95 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 112.5 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 54.47 ms. Allocated memory is still 151.0 MB. Free memory was 112.3 MB in the beginning and 110.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.40 ms. Allocated memory is still 151.0 MB. Free memory was 110.8 MB in the beginning and 109.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 643.20 ms. Allocated memory is still 151.0 MB. Free memory was 109.2 MB in the beginning and 127.8 MB in the end (delta: -18.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 860033.35 ms. Allocated memory was 151.0 MB in the beginning and 549.5 MB in the end (delta: 398.5 MB). Free memory was 127.3 MB in the beginning and 293.1 MB in the end (delta: -165.8 MB). Peak memory consumption was 359.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 16378.3ms, 123 PlacesBefore, 39 PlacesAfterwards, 125 TransitionsBefore, 35 TransitionsAfterwards, 1036 CoEnabledTransitionPairs, 7 FixpointIterations, 79 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 135 TotalNumberOfCompositions, 1224 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1160, positive: 1146, positive conditional: 0, positive unconditional: 1146, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 576, positive: 571, positive conditional: 0, positive unconditional: 571, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 576, positive: 567, positive conditional: 0, positive unconditional: 567, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 9, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 371, positive: 36, positive conditional: 0, positive unconditional: 36, negative: 335, negative conditional: 0, negative unconditional: 335, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1160, positive: 575, positive conditional: 0, positive unconditional: 575, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 576, unknown conditional: 0, unknown unconditional: 576] , Statistics on independence cache: Total cache size (in pairs): 45, Positive cache size: 44, Positive conditional cache size: 0, Positive unconditional cache size: 44, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 145 locations, 22 error locations. Started 1 CEGAR loops. OverallTime: 859797.8ms, OverallIterations: 27, TraceHistogramMax: 14, EmptinessCheckTime: 45.7ms, AutomataDifference: 116363.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16481.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 875 SDtfs, 8810 SDslu, 5819 SDs, 0 SdLazy, 7756 SolverSat, 442 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35125.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 584 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 97375.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=725occurred in iteration=24, InterpolantAutomatonStates: 284, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 496.7ms AutomataMinimizationTime, 26 MinimizatonAttempts, 11195 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 181.9ms SsaConstructionTime, 1841.9ms SatisfiabilityAnalysisTime, 36631.2ms InterpolantComputationTime, 242 NumberOfCodeBlocks, 242 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 432 ConstructedInterpolants, 41 QuantifiedInterpolants, 7104 SizeOfPredicates, 218 NumberOfNonLiveVariables, 1892 ConjunctsInSsa, 325 ConjunctsInUnsatCore, 52 InterpolantComputations, 22 PerfectInterpolantSequences, 103/538 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