/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 18:06:33,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 18:06:33,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 18:06:33,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-08 18:06:33,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-08 18:06:33,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-08 18:06:33,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-08 18:06:33,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-08 18:06:33,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-08 18:06:33,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-08 18:06:33,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-08 18:06:33,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-08 18:06:33,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-08 18:06:33,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-08 18:06:33,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-08 18:06:33,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-08 18:06:33,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-08 18:06:33,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-08 18:06:33,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-08 18:06:33,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-08 18:06:33,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-08 18:06:33,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-08 18:06:33,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-08 18:06:33,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-08 18:06:33,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-08 18:06:33,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-08 18:06:33,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-08 18:06:33,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-08 18:06:33,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-08 18:06:33,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-08 18:06:33,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-08 18:06:33,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-08 18:06:33,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-08 18:06:33,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 18:06:33,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 18:06:33,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 18:06:33,959 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-08 18:06:34,020 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 18:06:34,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 18:06:34,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 18:06:34,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 18:06:34,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 18:06:34,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 18:06:34,026 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 18:06:34,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 18:06:34,027 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 18:06:34,027 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-08 18:06:34,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 18:06:34,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 18:06:34,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 18:06:34,029 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-08 18:06:34,029 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-08 18:06:34,030 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-08 18:06:34,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 18:06:34,030 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-08 18:06:34,030 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-08 18:06:34,030 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-08 18:06:34,031 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 18:06:34,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 18:06:34,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 18:06:34,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 18:06:34,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 18:06:34,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 18:06:34,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 18:06:34,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 18:06:34,032 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-08 18:06:34,033 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-08 18:06:34,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 18:06:34,033 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-08 18:06:34,034 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-08 18:06:34,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 18:06:34,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 18:06:34,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 18:06:34,523 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 18:06:34,524 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 18:06:34,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2021-10-08 18:06:34,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba9a4a249/89fd3ee74df9409e9d32a3b21579eecb/FLAG8f55cfb8a [2021-10-08 18:06:35,239 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 18:06:35,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2021-10-08 18:06:35,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba9a4a249/89fd3ee74df9409e9d32a3b21579eecb/FLAG8f55cfb8a [2021-10-08 18:06:35,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba9a4a249/89fd3ee74df9409e9d32a3b21579eecb [2021-10-08 18:06:35,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 18:06:35,619 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-08 18:06:35,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 18:06:35,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 18:06:35,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 18:06:35,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 06:06:35" (1/1) ... [2021-10-08 18:06:35,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28a78c65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:06:35, skipping insertion in model container [2021-10-08 18:06:35,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 06:06:35" (1/1) ... [2021-10-08 18:06:35,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 18:06:35,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 18:06:35,944 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[2728,2741] [2021-10-08 18:06:35,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 18:06:35,999 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-08 18:06:36,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 18:06:36,023 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[2728,2741] [2021-10-08 18:06:36,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 18:06:36,035 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 18:06:36,065 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[2728,2741] [2021-10-08 18:06:36,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 18:06:36,095 INFO L208 MainTranslator]: Completed translation [2021-10-08 18:06:36,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:06:36 WrapperNode [2021-10-08 18:06:36,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 18:06:36,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 18:06:36,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 18:06:36,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 18:06:36,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:06:36" (1/1) ... [2021-10-08 18:06:36,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:06:36" (1/1) ... [2021-10-08 18:06:36,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 18:06:36,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 18:06:36,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 18:06:36,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 18:06:36,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:06:36" (1/1) ... [2021-10-08 18:06:36,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:06:36" (1/1) ... [2021-10-08 18:06:36,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:06:36" (1/1) ... [2021-10-08 18:06:36,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:06:36" (1/1) ... [2021-10-08 18:06:36,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:06:36" (1/1) ... [2021-10-08 18:06:36,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:06:36" (1/1) ... [2021-10-08 18:06:36,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:06:36" (1/1) ... [2021-10-08 18:06:36,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 18:06:36,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 18:06:36,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 18:06:36,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 18:06:36,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:06:36" (1/1) ... [2021-10-08 18:06:36,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 18:06:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 18:06:36,255 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-08 18:06:36,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-08 18:06:36,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-08 18:06:36,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 18:06:36,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-08 18:06:36,334 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 18:06:36,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 18:06:36,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 18:06:36,337 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 18:06:36,338 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-08 18:06:36,339 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-08 18:06:36,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 18:06:36,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 18:06:36,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-08 18:06:36,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 18:06:36,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 18:06:36,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 18:06:36,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-08 18:06:36,342 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 18:06:37,510 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 18:06:37,510 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-08 18:06:37,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 06:06:37 BoogieIcfgContainer [2021-10-08 18:06:37,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 18:06:37,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 18:06:37,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 18:06:37,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 18:06:37,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 06:06:35" (1/3) ... [2021-10-08 18:06:37,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab13d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 06:06:37, skipping insertion in model container [2021-10-08 18:06:37,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:06:36" (2/3) ... [2021-10-08 18:06:37,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab13d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 06:06:37, skipping insertion in model container [2021-10-08 18:06:37,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 06:06:37" (3/3) ... [2021-10-08 18:06:37,523 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2021-10-08 18:06:37,529 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 18:06:37,530 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2021-10-08 18:06:37,530 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 18:06:37,568 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,568 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,569 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,569 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,569 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,569 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,569 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,570 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,570 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,570 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,570 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,570 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,571 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,571 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,571 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,571 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,572 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,572 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,572 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,572 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,573 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,573 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,573 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,574 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,574 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,574 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,574 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,574 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,575 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,575 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,575 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,575 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,575 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,576 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,576 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,576 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,576 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,576 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,577 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,577 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,577 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,577 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,578 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,579 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,579 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,579 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,579 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,580 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,580 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,580 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,580 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,580 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,581 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,581 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,581 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,581 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,581 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,582 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,582 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,582 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,583 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,583 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,586 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,587 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,587 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,587 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,587 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,587 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,589 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,590 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,592 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,592 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,592 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,592 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,593 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,593 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,593 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,593 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,593 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:06:37,600 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-08 18:06:37,651 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 18:06:37,659 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-08 18:06:37,660 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-10-08 18:06:37,678 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 18:06:37,691 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 147 transitions, 318 flow [2021-10-08 18:06:37,694 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 147 transitions, 318 flow [2021-10-08 18:06:37,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 147 places, 147 transitions, 318 flow [2021-10-08 18:06:37,763 INFO L129 PetriNetUnfolder]: 10/144 cut-off events. [2021-10-08 18:06:37,764 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-08 18:06:37,770 INFO L84 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 144 events. 10/144 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 157 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2021-10-08 18:06:37,774 INFO L116 LiptonReduction]: Number of co-enabled transitions 1692 [2021-10-08 18:06:58,347 INFO L131 LiptonReduction]: Checked pairs total: 3327 [2021-10-08 18:06:58,347 INFO L133 LiptonReduction]: Total number of compositions: 149 [2021-10-08 18:06:58,358 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 48 transitions, 120 flow [2021-10-08 18:06:58,405 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 582 states, 484 states have (on average 3.6012396694214877) internal successors, (1743), 581 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:06:58,412 INFO L276 IsEmpty]: Start isEmpty. Operand has 582 states, 484 states have (on average 3.6012396694214877) internal successors, (1743), 581 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:06:58,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 18:06:58,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:06:58,418 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 18:06:58,419 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:06:58,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:06:58,427 INFO L82 PathProgramCache]: Analyzing trace with hash 19966, now seen corresponding path program 1 times [2021-10-08 18:06:58,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:06:58,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956108936] [2021-10-08 18:06:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:06:58,443 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:06:58,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:06:58,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:06:58,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-08 18:06:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:06:58,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 18:06:58,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:06:58,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:06:58,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:06:59,094 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:06:59,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 18:06:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:06:59,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:06:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:06:59,382 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:06:59,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956108936] [2021-10-08 18:06:59,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956108936] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:06:59,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:06:59,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:06:59,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937120399] [2021-10-08 18:06:59,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:06:59,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:06:59,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:06:59,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:06:59,413 INFO L87 Difference]: Start difference. First operand has 582 states, 484 states have (on average 3.6012396694214877) internal successors, (1743), 581 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:00,003 INFO L93 Difference]: Finished difference Result 1162 states and 3487 transitions. [2021-10-08 18:07:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:07:00,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 18:07:00,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:00,045 INFO L225 Difference]: With dead ends: 1162 [2021-10-08 18:07:00,045 INFO L226 Difference]: Without dead ends: 1162 [2021-10-08 18:07:00,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-10-08 18:07:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 583. [2021-10-08 18:07:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 486 states have (on average 3.6049382716049383) internal successors, (1752), 582 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1752 transitions. [2021-10-08 18:07:00,178 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1752 transitions. Word has length 2 [2021-10-08 18:07:00,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:00,180 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 1752 transitions. [2021-10-08 18:07:00,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:00,180 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1752 transitions. [2021-10-08 18:07:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 18:07:00,181 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:00,181 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 18:07:00,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:00,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:07:00,394 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:00,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:00,396 INFO L82 PathProgramCache]: Analyzing trace with hash 19967, now seen corresponding path program 1 times [2021-10-08 18:07:00,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:00,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105353224] [2021-10-08 18:07:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:07:00,398 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:00,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:00,399 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:07:00,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-08 18:07:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:07:00,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 18:07:00,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:00,694 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-08 18:07:00,695 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 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-08 18:07:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:01,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:01,381 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:01,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105353224] [2021-10-08 18:07:01,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105353224] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:07:01,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:07:01,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 18:07:01,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016213777] [2021-10-08 18:07:01,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 18:07:01,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:01,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 18:07:01,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:07:01,386 INFO L87 Difference]: Start difference. First operand 583 states and 1752 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:01,493 INFO L93 Difference]: Finished difference Result 582 states and 1749 transitions. [2021-10-08 18:07:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:07:01,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 18:07:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:01,499 INFO L225 Difference]: With dead ends: 582 [2021-10-08 18:07:01,500 INFO L226 Difference]: Without dead ends: 582 [2021-10-08 18:07:01,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:07:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-10-08 18:07:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2021-10-08 18:07:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 486 states have (on average 3.5987654320987654) internal successors, (1749), 581 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1749 transitions. [2021-10-08 18:07:01,531 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1749 transitions. Word has length 2 [2021-10-08 18:07:01,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:01,531 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 1749 transitions. [2021-10-08 18:07:01,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1749 transitions. [2021-10-08 18:07:01,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 18:07:01,532 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:01,532 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 18:07:01,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:01,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:07:01,745 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:01,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:01,746 INFO L82 PathProgramCache]: Analyzing trace with hash 20081, now seen corresponding path program 1 times [2021-10-08 18:07:01,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:01,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692905135] [2021-10-08 18:07:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:07:01,748 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:01,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:01,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:07:01,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-08 18:07:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:07:01,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 18:07:01,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:02,095 INFO L354 Elim1Store]: treesize reduction 358, result has 15.4 percent of original size [2021-10-08 18:07:02,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 217 treesize of output 250 [2021-10-08 18:07:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:05,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:05,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:05,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692905135] [2021-10-08 18:07:05,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692905135] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:07:05,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:07:05,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:07:05,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068672410] [2021-10-08 18:07:05,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:07:05,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:05,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:07:05,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:05,867 INFO L87 Difference]: Start difference. First operand 582 states and 1749 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) [2021-10-08 18:07:06,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:06,060 INFO L93 Difference]: Finished difference Result 501 states and 1466 transitions. [2021-10-08 18:07:06,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:07:06,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 18:07:06,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:06,065 INFO L225 Difference]: With dead ends: 501 [2021-10-08 18:07:06,066 INFO L226 Difference]: Without dead ends: 501 [2021-10-08 18:07:06,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-10-08 18:07:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2021-10-08 18:07:06,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 421 states have (on average 3.482185273159145) internal successors, (1466), 500 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1466 transitions. [2021-10-08 18:07:06,087 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1466 transitions. Word has length 2 [2021-10-08 18:07:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:06,087 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1466 transitions. [2021-10-08 18:07:06,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:06,088 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1466 transitions. [2021-10-08 18:07:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 18:07:06,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:06,088 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 18:07:06,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:06,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:07:06,303 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:06,304 INFO L82 PathProgramCache]: Analyzing trace with hash 20082, now seen corresponding path program 1 times [2021-10-08 18:07:06,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:06,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835890362] [2021-10-08 18:07:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:07:06,306 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:06,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:06,307 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:07:06,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-08 18:07:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:07:06,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-08 18:07:06,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:06,765 INFO L354 Elim1Store]: treesize reduction 245, result has 17.2 percent of original size [2021-10-08 18:07:06,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 104 [2021-10-08 18:07:06,783 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-08 18:07:06,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 698 treesize of output 678 [2021-10-08 18:07:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:09,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:09,760 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:09,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835890362] [2021-10-08 18:07:09,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835890362] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:07:09,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:07:09,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:07:09,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051502111] [2021-10-08 18:07:09,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:07:09,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:09,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:07:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:09,762 INFO L87 Difference]: Start difference. First operand 501 states and 1466 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) [2021-10-08 18:07:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:09,977 INFO L93 Difference]: Finished difference Result 420 states and 1183 transitions. [2021-10-08 18:07:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:07:09,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 18:07:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:09,982 INFO L225 Difference]: With dead ends: 420 [2021-10-08 18:07:09,982 INFO L226 Difference]: Without dead ends: 420 [2021-10-08 18:07:09,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:09,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-10-08 18:07:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2021-10-08 18:07:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 356 states have (on average 3.3230337078651684) internal successors, (1183), 419 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:09,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1183 transitions. [2021-10-08 18:07:09,999 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1183 transitions. Word has length 2 [2021-10-08 18:07:10,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:10,000 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1183 transitions. [2021-10-08 18:07:10,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:10,000 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1183 transitions. [2021-10-08 18:07:10,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 18:07:10,001 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:10,001 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 18:07:10,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:10,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:07:10,214 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:10,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:10,215 INFO L82 PathProgramCache]: Analyzing trace with hash 19311153, now seen corresponding path program 1 times [2021-10-08 18:07:10,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:10,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950205753] [2021-10-08 18:07:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:07:10,217 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:10,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:10,218 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:07:10,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-08 18:07:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:07:10,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-08 18:07:10,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:10,564 INFO L354 Elim1Store]: treesize reduction 239, result has 19.3 percent of original size [2021-10-08 18:07:10,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 91 [2021-10-08 18:07:10,571 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 146 treesize of output 142 [2021-10-08 18:07:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:13,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:13,830 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:13,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950205753] [2021-10-08 18:07:13,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950205753] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:07:13,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:07:13,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:07:13,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331458425] [2021-10-08 18:07:13,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:07:13,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:13,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:07:13,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:13,835 INFO L87 Difference]: Start difference. First operand 420 states and 1183 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) [2021-10-08 18:07:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:14,177 INFO L93 Difference]: Finished difference Result 399 states and 1133 transitions. [2021-10-08 18:07:14,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:07:14,179 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 [2021-10-08 18:07:14,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:14,182 INFO L225 Difference]: With dead ends: 399 [2021-10-08 18:07:14,183 INFO L226 Difference]: Without dead ends: 399 [2021-10-08 18:07:14,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-10-08 18:07:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2021-10-08 18:07:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 343 states have (on average 3.303206997084548) internal successors, (1133), 398 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:14,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1133 transitions. [2021-10-08 18:07:14,211 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1133 transitions. Word has length 4 [2021-10-08 18:07:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:14,212 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1133 transitions. [2021-10-08 18:07:14,213 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) [2021-10-08 18:07:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1133 transitions. [2021-10-08 18:07:14,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 18:07:14,214 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:14,214 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 18:07:14,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:14,427 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 [2021-10-08 18:07:14,428 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:14,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:14,430 INFO L82 PathProgramCache]: Analyzing trace with hash 19311154, now seen corresponding path program 1 times [2021-10-08 18:07:14,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:14,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924742693] [2021-10-08 18:07:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:07:14,431 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:14,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:14,433 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) [2021-10-08 18:07:14,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-08 18:07:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:07:14,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 18:07:14,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:14,688 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-08 18:07:14,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 73 treesize of output 116 [2021-10-08 18:07:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:18,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:19,017 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:19,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924742693] [2021-10-08 18:07:19,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924742693] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:07:19,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:07:19,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:07:19,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377122841] [2021-10-08 18:07:19,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:07:19,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:19,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:07:19,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:19,027 INFO L87 Difference]: Start difference. First operand 399 states and 1133 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) [2021-10-08 18:07:19,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:19,139 INFO L93 Difference]: Finished difference Result 378 states and 1083 transitions. [2021-10-08 18:07:19,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:07:19,140 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 [2021-10-08 18:07:19,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:19,143 INFO L225 Difference]: With dead ends: 378 [2021-10-08 18:07:19,144 INFO L226 Difference]: Without dead ends: 378 [2021-10-08 18:07:19,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:19,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-10-08 18:07:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-10-08 18:07:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 330 states have (on average 3.2818181818181817) internal successors, (1083), 377 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1083 transitions. [2021-10-08 18:07:19,159 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1083 transitions. Word has length 4 [2021-10-08 18:07:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:19,160 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1083 transitions. [2021-10-08 18:07:19,160 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) [2021-10-08 18:07:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1083 transitions. [2021-10-08 18:07:19,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 18:07:19,161 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:19,161 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 18:07:19,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:19,373 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 [2021-10-08 18:07:19,374 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:19,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:19,375 INFO L82 PathProgramCache]: Analyzing trace with hash 19311090, now seen corresponding path program 1 times [2021-10-08 18:07:19,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:19,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752591051] [2021-10-08 18:07:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:07:19,376 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:19,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:19,378 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) [2021-10-08 18:07:19,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-08 18:07:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:07:19,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 18:07:19,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:19,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:19,515 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:19,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752591051] [2021-10-08 18:07:19,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752591051] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:07:19,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:07:19,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:07:19,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882593192] [2021-10-08 18:07:19,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:07:19,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:19,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:07:19,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:19,518 INFO L87 Difference]: Start difference. First operand 378 states and 1083 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) [2021-10-08 18:07:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:19,642 INFO L93 Difference]: Finished difference Result 564 states and 1549 transitions. [2021-10-08 18:07:19,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:07:19,644 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 [2021-10-08 18:07:19,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:19,649 INFO L225 Difference]: With dead ends: 564 [2021-10-08 18:07:19,649 INFO L226 Difference]: Without dead ends: 559 [2021-10-08 18:07:19,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:19,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-10-08 18:07:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 465. [2021-10-08 18:07:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 403 states have (on average 3.3176178660049627) internal successors, (1337), 464 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1337 transitions. [2021-10-08 18:07:19,676 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1337 transitions. Word has length 4 [2021-10-08 18:07:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:19,677 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 1337 transitions. [2021-10-08 18:07:19,677 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) [2021-10-08 18:07:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1337 transitions. [2021-10-08 18:07:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 18:07:19,677 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:19,678 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-08 18:07:19,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:19,893 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 [2021-10-08 18:07:19,893 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:19,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:19,894 INFO L82 PathProgramCache]: Analyzing trace with hash 19307422, now seen corresponding path program 1 times [2021-10-08 18:07:19,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:19,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120418635] [2021-10-08 18:07:19,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:07:19,896 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:19,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:19,897 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:07:19,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-08 18:07:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:07:19,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 18:07:19,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:20,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:07:20,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:07:20,235 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:07:20,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 18:07:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:20,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:20,801 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:20,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120418635] [2021-10-08 18:07:20,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120418635] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:07:20,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:07:20,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 18:07:20,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691096665] [2021-10-08 18:07:20,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:07:20,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:20,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:07:20,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:07:20,803 INFO L87 Difference]: Start difference. First operand 465 states and 1337 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:22,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:22,269 INFO L93 Difference]: Finished difference Result 2769 states and 7990 transitions. [2021-10-08 18:07:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 18:07:22,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-08 18:07:22,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:22,297 INFO L225 Difference]: With dead ends: 2769 [2021-10-08 18:07:22,298 INFO L226 Difference]: Without dead ends: 2769 [2021-10-08 18:07:22,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 719.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-08 18:07:22,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-10-08 18:07:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 469. [2021-10-08 18:07:22,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 407 states have (on average 3.3046683046683047) internal successors, (1345), 468 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1345 transitions. [2021-10-08 18:07:22,348 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1345 transitions. Word has length 4 [2021-10-08 18:07:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:22,349 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1345 transitions. [2021-10-08 18:07:22,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1345 transitions. [2021-10-08 18:07:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 18:07:22,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:22,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-08 18:07:22,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:22,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:07:22,565 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:22,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:22,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1378162291, now seen corresponding path program 1 times [2021-10-08 18:07:22,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:22,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313938613] [2021-10-08 18:07:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:07:22,567 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:22,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:22,569 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:07:22,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-08 18:07:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:07:22,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 18:07:22,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:22,879 INFO L354 Elim1Store]: treesize reduction 247, result has 16.6 percent of original size [2021-10-08 18:07:22,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 82 [2021-10-08 18:07:22,886 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 114 treesize of output 112 [2021-10-08 18:07:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:23,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:23,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:23,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313938613] [2021-10-08 18:07:23,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313938613] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:07:23,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:07:23,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:07:23,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139659778] [2021-10-08 18:07:23,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:07:23,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:23,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:07:23,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:23,570 INFO L87 Difference]: Start difference. First operand 469 states and 1345 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:23,667 INFO L93 Difference]: Finished difference Result 415 states and 1187 transitions. [2021-10-08 18:07:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:07:23,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-08 18:07:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:23,671 INFO L225 Difference]: With dead ends: 415 [2021-10-08 18:07:23,671 INFO L226 Difference]: Without dead ends: 415 [2021-10-08 18:07:23,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:23,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-10-08 18:07:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2021-10-08 18:07:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 374 states have (on average 3.1737967914438503) internal successors, (1187), 414 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:23,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1187 transitions. [2021-10-08 18:07:23,690 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1187 transitions. Word has length 6 [2021-10-08 18:07:23,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:23,691 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1187 transitions. [2021-10-08 18:07:23,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1187 transitions. [2021-10-08 18:07:23,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 18:07:23,692 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:23,692 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-08 18:07:23,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:23,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:07:23,905 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:23,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:23,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1378162292, now seen corresponding path program 1 times [2021-10-08 18:07:23,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:23,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057643257] [2021-10-08 18:07:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:07:23,908 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:23,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:23,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:07:23,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-08 18:07:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:07:24,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 18:07:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:24,221 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-08 18:07:24,222 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 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-08 18:07:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:24,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:24,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:24,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057643257] [2021-10-08 18:07:24,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057643257] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:07:24,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:07:24,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 18:07:24,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466860085] [2021-10-08 18:07:24,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 18:07:24,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:24,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 18:07:24,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:07:24,744 INFO L87 Difference]: Start difference. First operand 415 states and 1187 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:24,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:24,814 INFO L93 Difference]: Finished difference Result 361 states and 1029 transitions. [2021-10-08 18:07:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:07:24,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-08 18:07:24,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:24,818 INFO L225 Difference]: With dead ends: 361 [2021-10-08 18:07:24,818 INFO L226 Difference]: Without dead ends: 360 [2021-10-08 18:07:24,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:07:24,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-10-08 18:07:24,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-10-08 18:07:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 340 states have (on average 3.0205882352941176) internal successors, (1027), 359 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1027 transitions. [2021-10-08 18:07:24,832 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1027 transitions. Word has length 6 [2021-10-08 18:07:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:24,832 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1027 transitions. [2021-10-08 18:07:24,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1027 transitions. [2021-10-08 18:07:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 18:07:24,833 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:24,834 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:07:24,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:25,047 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 [2021-10-08 18:07:25,048 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:25,048 INFO L82 PathProgramCache]: Analyzing trace with hash -226646311, now seen corresponding path program 1 times [2021-10-08 18:07:25,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:25,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782833540] [2021-10-08 18:07:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:07:25,049 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:25,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:25,050 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) [2021-10-08 18:07:25,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-08 18:07:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:07:25,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 18:07:25,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:25,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:25,182 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:25,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782833540] [2021-10-08 18:07:25,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782833540] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:07:25,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:07:25,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-08 18:07:25,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435995774] [2021-10-08 18:07:25,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:07:25,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:25,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:07:25,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:25,183 INFO L87 Difference]: Start difference. First operand 360 states and 1027 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:25,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:25,246 INFO L93 Difference]: Finished difference Result 392 states and 1073 transitions. [2021-10-08 18:07:25,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:07:25,247 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-08 18:07:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:25,251 INFO L225 Difference]: With dead ends: 392 [2021-10-08 18:07:25,251 INFO L226 Difference]: Without dead ends: 392 [2021-10-08 18:07:25,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-10-08 18:07:25,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 346. [2021-10-08 18:07:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 328 states have (on average 3.0701219512195124) internal successors, (1007), 345 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1007 transitions. [2021-10-08 18:07:25,264 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1007 transitions. Word has length 7 [2021-10-08 18:07:25,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:25,265 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 1007 transitions. [2021-10-08 18:07:25,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1007 transitions. [2021-10-08 18:07:25,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 18:07:25,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:25,267 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:07:25,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:25,480 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 [2021-10-08 18:07:25,480 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:25,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:25,481 INFO L82 PathProgramCache]: Analyzing trace with hash -226646310, now seen corresponding path program 1 times [2021-10-08 18:07:25,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:25,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493513398] [2021-10-08 18:07:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:07:25,482 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:25,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:25,484 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) [2021-10-08 18:07:25,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-08 18:07:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:07:25,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 18:07:25,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:25,752 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-08 18:07:25,753 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 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-08 18:07:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:26,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:26,251 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:26,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493513398] [2021-10-08 18:07:26,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493513398] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:07:26,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:07:26,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-08 18:07:26,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973081403] [2021-10-08 18:07:26,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:07:26,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:26,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:07:26,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:07:26,254 INFO L87 Difference]: Start difference. First operand 346 states and 1007 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:26,364 INFO L93 Difference]: Finished difference Result 236 states and 671 transitions. [2021-10-08 18:07:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:07:26,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-08 18:07:26,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:26,367 INFO L225 Difference]: With dead ends: 236 [2021-10-08 18:07:26,367 INFO L226 Difference]: Without dead ends: 236 [2021-10-08 18:07:26,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-08 18:07:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-08 18:07:26,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-10-08 18:07:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 228 states have (on average 2.942982456140351) internal successors, (671), 235 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:26,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 671 transitions. [2021-10-08 18:07:26,376 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 671 transitions. Word has length 7 [2021-10-08 18:07:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:26,376 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 671 transitions. [2021-10-08 18:07:26,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 671 transitions. [2021-10-08 18:07:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 18:07:26,377 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:26,377 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:07:26,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:26,578 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 [2021-10-08 18:07:26,578 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:26,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:26,579 INFO L82 PathProgramCache]: Analyzing trace with hash -226646308, now seen corresponding path program 1 times [2021-10-08 18:07:26,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:26,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867519295] [2021-10-08 18:07:26,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:07:26,581 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:26,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:26,582 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:07:26,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-08 18:07:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:07:26,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 18:07:26,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:26,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:26,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:26,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867519295] [2021-10-08 18:07:26,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867519295] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:07:26,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:07:26,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-08 18:07:26,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659332656] [2021-10-08 18:07:26,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 18:07:26,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:26,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 18:07:26,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-08 18:07:26,783 INFO L87 Difference]: Start difference. First operand 236 states and 671 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:26,897 INFO L93 Difference]: Finished difference Result 309 states and 824 transitions. [2021-10-08 18:07:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 18:07:26,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-08 18:07:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:26,905 INFO L225 Difference]: With dead ends: 309 [2021-10-08 18:07:26,905 INFO L226 Difference]: Without dead ends: 295 [2021-10-08 18:07:26,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-08 18:07:26,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-10-08 18:07:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 273. [2021-10-08 18:07:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 265 states have (on average 2.860377358490566) internal successors, (758), 272 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 758 transitions. [2021-10-08 18:07:26,914 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 758 transitions. Word has length 7 [2021-10-08 18:07:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:26,915 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 758 transitions. [2021-10-08 18:07:26,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 758 transitions. [2021-10-08 18:07:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 18:07:26,916 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:26,916 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:07:26,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:27,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:07:27,130 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:27,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:27,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1671171953, now seen corresponding path program 1 times [2021-10-08 18:07:27,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:27,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408147375] [2021-10-08 18:07:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:07:27,132 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:27,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:27,133 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:07:27,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-08 18:07:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:07:27,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-08 18:07:27,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:07:27,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:07:27,476 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:07:27,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 18:07:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:27,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:28,512 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:28,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408147375] [2021-10-08 18:07:28,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408147375] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:07:28,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:07:28,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 18:07:28,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363262041] [2021-10-08 18:07:28,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:07:28,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:28,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:07:28,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:07:28,514 INFO L87 Difference]: Start difference. First operand 273 states and 758 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:32,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:32,849 INFO L93 Difference]: Finished difference Result 577 states and 1572 transitions. [2021-10-08 18:07:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 18:07:32,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-08 18:07:32,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:32,854 INFO L225 Difference]: With dead ends: 577 [2021-10-08 18:07:32,854 INFO L226 Difference]: Without dead ends: 577 [2021-10-08 18:07:32,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3389.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-08 18:07:32,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-10-08 18:07:32,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 382. [2021-10-08 18:07:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 374 states have (on average 2.9010695187165774) internal successors, (1085), 381 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:32,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1085 transitions. [2021-10-08 18:07:32,869 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1085 transitions. Word has length 8 [2021-10-08 18:07:32,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:32,870 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1085 transitions. [2021-10-08 18:07:32,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:32,870 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1085 transitions. [2021-10-08 18:07:32,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 18:07:32,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:32,871 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-08 18:07:32,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-08 18:07:33,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:07:33,084 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:33,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:33,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1779007778, now seen corresponding path program 2 times [2021-10-08 18:07:33,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:33,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097160990] [2021-10-08 18:07:33,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:07:33,087 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:33,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:33,088 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:07:33,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-08 18:07:33,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 18:07:33,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:07:33,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 18:07:33,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:33,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:07:33,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:07:33,606 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:07:33,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 18:07:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:34,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:35,923 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:35,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097160990] [2021-10-08 18:07:35,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097160990] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:07:35,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:07:35,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 18:07:35,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243837974] [2021-10-08 18:07:35,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 18:07:35,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:35,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 18:07:35,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-08 18:07:35,926 INFO L87 Difference]: Start difference. First operand 382 states and 1085 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:45,567 INFO L93 Difference]: Finished difference Result 2739 states and 7778 transitions. [2021-10-08 18:07:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-08 18:07:45,575 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-08 18:07:45,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:45,596 INFO L225 Difference]: With dead ends: 2739 [2021-10-08 18:07:45,597 INFO L226 Difference]: Without dead ends: 2739 [2021-10-08 18:07:45,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 7467.3ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-08 18:07:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2021-10-08 18:07:45,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 390. [2021-10-08 18:07:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 2.8821989528795813) internal successors, (1101), 389 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1101 transitions. [2021-10-08 18:07:45,634 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1101 transitions. Word has length 8 [2021-10-08 18:07:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:45,634 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1101 transitions. [2021-10-08 18:07:45,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1101 transitions. [2021-10-08 18:07:45,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 18:07:45,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:45,636 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:07:45,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:45,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:07:45,849 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:45,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:45,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1587280796, now seen corresponding path program 2 times [2021-10-08 18:07:45,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:45,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984445534] [2021-10-08 18:07:45,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:07:45,852 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:45,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:45,853 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:07:45,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-08 18:07:45,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 18:07:45,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:07:45,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 18:07:45,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:46,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:07:46,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:07:46,330 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:07:46,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 18:07:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 18:07:46,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 18:07:47,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:47,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984445534] [2021-10-08 18:07:47,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984445534] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:07:47,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:07:47,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-08 18:07:47,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970423242] [2021-10-08 18:07:47,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 18:07:47,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:47,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 18:07:47,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 18:07:47,713 INFO L87 Difference]: Start difference. First operand 390 states and 1101 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:47,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:07:47,923 INFO L93 Difference]: Finished difference Result 304 states and 837 transitions. [2021-10-08 18:07:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:07:47,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 18:07:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:07:47,928 INFO L225 Difference]: With dead ends: 304 [2021-10-08 18:07:47,928 INFO L226 Difference]: Without dead ends: 304 [2021-10-08 18:07:47,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-08 18:07:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-10-08 18:07:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 185. [2021-10-08 18:07:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 2.612021857923497) internal successors, (478), 184 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:47,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 478 transitions. [2021-10-08 18:07:47,935 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 478 transitions. Word has length 11 [2021-10-08 18:07:47,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:07:47,935 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 478 transitions. [2021-10-08 18:07:47,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:07:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 478 transitions. [2021-10-08 18:07:47,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 18:07:47,937 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:07:47,937 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-08 18:07:47,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-08 18:07:48,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:07:48,150 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:07:48,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:07:48,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1023711906, now seen corresponding path program 3 times [2021-10-08 18:07:48,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:07:48,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067523428] [2021-10-08 18:07:48,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 18:07:48,153 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:07:48,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:07:48,154 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:07:48,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-08 18:07:48,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-08 18:07:48,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:07:48,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-08 18:07:48,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:07:48,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:07:48,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:07:48,896 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 18:07:48,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-08 18:07:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:50,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:07:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:07:57,969 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:07:57,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067523428] [2021-10-08 18:07:57,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067523428] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:07:57,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:07:57,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-08 18:07:57,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6516116] [2021-10-08 18:07:57,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-08 18:07:57,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:07:57,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-08 18:07:57,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-08 18:07:57,972 INFO L87 Difference]: Start difference. First operand 185 states and 478 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:08:14,752 WARN L207 SmtUtils]: Spent 12.46 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-08 18:08:26,036 WARN L207 SmtUtils]: Spent 10.33 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-08 18:08:35,227 WARN L207 SmtUtils]: Spent 8.17 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-08 18:08:42,728 WARN L207 SmtUtils]: Spent 6.46 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-08 18:09:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:09:13,275 INFO L93 Difference]: Finished difference Result 3891 states and 10594 transitions. [2021-10-08 18:09:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-08 18:09:13,277 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-08 18:09:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:09:13,310 INFO L225 Difference]: With dead ends: 3891 [2021-10-08 18:09:13,310 INFO L226 Difference]: Without dead ends: 3891 [2021-10-08 18:09:13,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 70780.8ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-08 18:09:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-10-08 18:09:13,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 201. [2021-10-08 18:09:13,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 199 states have (on average 2.562814070351759) internal successors, (510), 200 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:09:13,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 510 transitions. [2021-10-08 18:09:13,350 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 510 transitions. Word has length 16 [2021-10-08 18:09:13,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:09:13,351 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 510 transitions. [2021-10-08 18:09:13,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:09:13,351 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 510 transitions. [2021-10-08 18:09:13,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-08 18:09:13,352 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:09:13,352 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:09:13,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-08 18:09:13,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:09:13,566 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:09:13,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:09:13,567 INFO L82 PathProgramCache]: Analyzing trace with hash -165436184, now seen corresponding path program 1 times [2021-10-08 18:09:13,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:09:13,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960646669] [2021-10-08 18:09:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:09:13,568 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:09:13,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:09:13,569 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:09:13,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-08 18:09:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:09:13,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 18:09:13,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:09:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:09:13,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:09:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:09:13,847 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:09:13,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960646669] [2021-10-08 18:09:13,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960646669] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:09:13,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:09:13,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-08 18:09:13,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099539040] [2021-10-08 18:09:13,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:09:13,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:09:13,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:09:13,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:09:13,849 INFO L87 Difference]: Start difference. First operand 201 states and 510 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:09:13,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:09:13,883 INFO L93 Difference]: Finished difference Result 175 states and 387 transitions. [2021-10-08 18:09:13,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:09:13,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-08 18:09:13,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:09:13,885 INFO L225 Difference]: With dead ends: 175 [2021-10-08 18:09:13,885 INFO L226 Difference]: Without dead ends: 143 [2021-10-08 18:09:13,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:09:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-08 18:09:13,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 125. [2021-10-08 18:09:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 123 states have (on average 2.1463414634146343) internal successors, (264), 124 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:09:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 264 transitions. [2021-10-08 18:09:13,889 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 264 transitions. Word has length 18 [2021-10-08 18:09:13,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:09:13,890 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 264 transitions. [2021-10-08 18:09:13,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:09:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 264 transitions. [2021-10-08 18:09:13,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-08 18:09:13,891 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:09:13,891 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:09:13,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-08 18:09:14,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:09:14,104 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:09:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:09:14,104 INFO L82 PathProgramCache]: Analyzing trace with hash 554348486, now seen corresponding path program 2 times [2021-10-08 18:09:14,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:09:14,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268781884] [2021-10-08 18:09:14,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:09:14,106 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:09:14,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:09:14,107 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:09:14,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-08 18:09:14,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 18:09:14,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:09:14,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 18:09:14,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:09:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:09:14,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:09:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:09:14,511 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:09:14,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268781884] [2021-10-08 18:09:14,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268781884] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:09:14,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:09:14,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-08 18:09:14,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062600725] [2021-10-08 18:09:14,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 18:09:14,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:09:14,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 18:09:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 18:09:14,513 INFO L87 Difference]: Start difference. First operand 125 states and 264 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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) [2021-10-08 18:09:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:09:14,570 INFO L93 Difference]: Finished difference Result 149 states and 323 transitions. [2021-10-08 18:09:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:09:14,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 18 [2021-10-08 18:09:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:09:14,571 INFO L225 Difference]: With dead ends: 149 [2021-10-08 18:09:14,571 INFO L226 Difference]: Without dead ends: 122 [2021-10-08 18:09:14,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-08 18:09:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-08 18:09:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-10-08 18:09:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 120 states have (on average 2.225) internal successors, (267), 121 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:09:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 267 transitions. [2021-10-08 18:09:14,576 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 267 transitions. Word has length 18 [2021-10-08 18:09:14,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:09:14,576 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 267 transitions. [2021-10-08 18:09:14,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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) [2021-10-08 18:09:14,576 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 267 transitions. [2021-10-08 18:09:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-08 18:09:14,577 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:09:14,577 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:09:14,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-08 18:09:14,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:09:14,778 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:09:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:09:14,779 INFO L82 PathProgramCache]: Analyzing trace with hash 217859794, now seen corresponding path program 1 times [2021-10-08 18:09:14,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:09:14,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337705409] [2021-10-08 18:09:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:09:14,781 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:09:14,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:09:14,782 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:09:14,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-08 18:09:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:09:14,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-08 18:09:14,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:09:15,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-08 18:09:15,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-10-08 18:09:15,318 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-08 18:09:15,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 31 [2021-10-08 18:09:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:09:15,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:09:15,722 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 262 treesize of output 258 [2021-10-08 18:09:15,964 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-10-08 18:09:15,964 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 258 treesize of output 166 [2021-10-08 18:09:15,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 162 [2021-10-08 18:10:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:10:03,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:10:03,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337705409] [2021-10-08 18:10:03,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337705409] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:10:03,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:10:03,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-08 18:10:03,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091141364] [2021-10-08 18:10:03,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 18:10:03,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:10:03,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 18:10:03,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-08 18:10:03,612 INFO L87 Difference]: Start difference. First operand 122 states and 267 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:10:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:10:04,897 INFO L93 Difference]: Finished difference Result 162 states and 367 transitions. [2021-10-08 18:10:04,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 18:10:04,899 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 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 23 [2021-10-08 18:10:04,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:10:04,900 INFO L225 Difference]: With dead ends: 162 [2021-10-08 18:10:04,901 INFO L226 Difference]: Without dead ends: 150 [2021-10-08 18:10:04,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1131.5ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-10-08 18:10:04,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-08 18:10:04,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 138. [2021-10-08 18:10:04,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 136 states have (on average 2.286764705882353) internal successors, (311), 137 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:10:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 311 transitions. [2021-10-08 18:10:04,905 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 311 transitions. Word has length 23 [2021-10-08 18:10:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:10:04,906 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 311 transitions. [2021-10-08 18:10:04,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:10:04,906 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 311 transitions. [2021-10-08 18:10:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-08 18:10:04,907 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:10:04,907 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:10:04,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-08 18:10:05,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:10:05,122 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-08 18:10:05,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:10:05,123 INFO L82 PathProgramCache]: Analyzing trace with hash 37057850, now seen corresponding path program 2 times [2021-10-08 18:10:05,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:10:05,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710393736] [2021-10-08 18:10:05,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:10:05,124 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:10:05,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:10:05,125 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:10:05,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-08 18:10:05,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 18:10:05,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:10:05,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 18:10:05,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:10:05,469 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 59 treesize of output 57 [2021-10-08 18:10:05,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-08 18:10:05,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-10-08 18:10:05,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:10:05,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:10:06,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:10:06,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:10:06,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:10:06,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:10:06,423 INFO L354 Elim1Store]: treesize reduction 1157, result has 6.2 percent of original size [2021-10-08 18:10:06,423 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 79 treesize of output 99 [2021-10-08 18:10:10,990 INFO L354 Elim1Store]: treesize reduction 463, result has 0.2 percent of original size [2021-10-08 18:10:10,990 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 143 treesize of output 51 [2021-10-08 18:10:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:10:11,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:10:15,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:10:15,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710393736] [2021-10-08 18:10:15,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 18:10:15,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [789727557] [2021-10-08 18:10:15,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:10:15,847 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-08 18:10:15,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-08 18:10:15,850 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-08 18:10:15,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-08 18:10:16,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-08 18:10:16,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142762430] [2021-10-08 18:10:16,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:10:16,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 1 [2021-10-08 18:10:16,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 18:10:16,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 18:10:16,425 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 18:10:16,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-08 18:10:16,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 18:10:16,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:10:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-08 18:10:16,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:10:16,856 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 132 treesize of output 130 [2021-10-08 18:10:17,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-08 18:10:17,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-10-08 18:10:18,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:10:18,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:10:18,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:10:18,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:10:18,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:10:18,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:10:18,567 INFO L354 Elim1Store]: treesize reduction 1175, result has 6.2 percent of original size [2021-10-08 18:10:18,567 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 80 treesize of output 100 [2021-10-08 18:10:23,425 INFO L354 Elim1Store]: treesize reduction 1040, result has 1.2 percent of original size [2021-10-08 18:10:23,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 142 treesize of output 70 [2021-10-08 18:10:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:10:23,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:10:25,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 18:10:25,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:10:25,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-08 18:10:25,696 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-08 18:10:25,696 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-08 18:10:25,700 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 18:10:25,702 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-08 18:10:25,702 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-08 18:10:25,702 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-08 18:10:25,703 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-08 18:10:25,703 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-08 18:10:25,703 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-08 18:10:25,703 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-08 18:10:25,703 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-08 18:10:25,703 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-08 18:10:25,703 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-08 18:10:25,703 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-08 18:10:25,703 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-08 18:10:25,704 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-08 18:10:25,704 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-08 18:10:25,704 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-08 18:10:25,704 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-08 18:10:25,704 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-08 18:10:25,704 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-08 18:10:25,704 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-08 18:10:25,705 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-08 18:10:25,705 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 18:10:25,705 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 18:10:25,705 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 18:10:25,705 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-08 18:10:25,705 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-08 18:10:25,706 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-08 18:10:25,706 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-08 18:10:25,706 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-08 18:10:25,706 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-08 18:10:25,706 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-08 18:10:25,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-08 18:10:25,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-08 18:10:26,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 18:10:26,116 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 18:10:26,116 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 18:10:26,117 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transformations.BlockEncodingBacktranslator.translateProgramExecution(BlockEncodingBacktranslator.java:130) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:589) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-08 18:10:26,124 INFO L168 Benchmark]: Toolchain (without parser) took 230515.51 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 126.2 MB in the beginning and 54.3 MB in the end (delta: 71.9 MB). Peak memory consumption was 105.9 MB. Max. memory is 8.0 GB. [2021-10-08 18:10:26,124 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 121.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-08 18:10:26,125 INFO L168 Benchmark]: CACSL2BoogieTranslator took 473.90 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 112.7 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-08 18:10:26,126 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.33 ms. Allocated memory is still 151.0 MB. Free memory was 112.7 MB in the beginning and 110.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 18:10:26,126 INFO L168 Benchmark]: Boogie Preprocessor took 39.42 ms. Allocated memory is still 151.0 MB. Free memory was 110.8 MB in the beginning and 109.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 18:10:26,127 INFO L168 Benchmark]: RCFGBuilder took 1317.79 ms. Allocated memory is still 151.0 MB. Free memory was 109.0 MB in the beginning and 114.9 MB in the end (delta: -5.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. [2021-10-08 18:10:26,127 INFO L168 Benchmark]: TraceAbstraction took 228607.91 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 114.3 MB in the beginning and 54.3 MB in the end (delta: 60.0 MB). Peak memory consumption was 93.6 MB. Max. memory is 8.0 GB. [2021-10-08 18:10:26,129 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 121.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 473.90 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 112.7 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 57.33 ms. Allocated memory is still 151.0 MB. Free memory was 112.7 MB in the beginning and 110.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.42 ms. Allocated memory is still 151.0 MB. Free memory was 110.8 MB in the beginning and 109.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1317.79 ms. Allocated memory is still 151.0 MB. Free memory was 109.0 MB in the beginning and 114.9 MB in the end (delta: -5.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 228607.91 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 114.3 MB in the beginning and 54.3 MB in the end (delta: 60.0 MB). Peak memory consumption was 93.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 20652.9ms, 147 PlacesBefore, 55 PlacesAfterwards, 147 TransitionsBefore, 48 TransitionsAfterwards, 1692 CoEnabledTransitionPairs, 6 FixpointIterations, 77 TrivialSequentialCompositions, 52 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 7 ChoiceCompositions, 149 TotalNumberOfCompositions, 3327 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2426, positive: 2351, positive conditional: 0, positive unconditional: 2351, negative: 75, negative conditional: 0, negative unconditional: 75, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1153, positive: 1126, positive conditional: 0, positive unconditional: 1126, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1153, positive: 1122, positive conditional: 0, positive unconditional: 1122, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 31, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1387, positive: 737, positive conditional: 0, positive unconditional: 737, negative: 649, negative conditional: 0, negative unconditional: 649, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2426, positive: 1225, positive conditional: 0, positive unconditional: 1225, negative: 48, negative conditional: 0, negative unconditional: 48, unknown: 1153, unknown conditional: 0, unknown unconditional: 1153] , Statistics on independence cache: Total cache size (in pairs): 126, Positive cache size: 117, Positive conditional cache size: 0, Positive unconditional cache size: 117, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9 - 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 - ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transformations.BlockEncodingBacktranslator.translateProgramExecution(BlockEncodingBacktranslator.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-08 18:10:26,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...