/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-min-max-inc.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 17:38:43,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 17:38:43,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 17:38:43,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-08 17:38:43,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-08 17:38:43,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-08 17:38:43,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-08 17:38:43,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-08 17:38:43,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-08 17:38:43,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-08 17:38:43,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-08 17:38:43,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-08 17:38:43,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-08 17:38:43,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-08 17:38:43,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-08 17:38:43,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-08 17:38:43,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-08 17:38:43,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-08 17:38:43,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-08 17:38:43,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-08 17:38:43,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-08 17:38:43,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-08 17:38:43,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-08 17:38:43,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-08 17:38:43,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-08 17:38:43,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-08 17:38:43,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-08 17:38:43,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-08 17:38:43,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-08 17:38:43,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-08 17:38:43,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-08 17:38:43,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-08 17:38:43,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-08 17:38:43,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-08 17:38:43,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-08 17:38:43,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-08 17:38:43,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-08 17:38:43,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-08 17:38:43,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 17:38:43,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 17:38:43,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 17:38:43,528 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 17:38:43,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 17:38:43,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 17:38:43,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 17:38:43,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 17:38:43,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 17:38:43,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 17:38:43,586 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 17:38:43,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 17:38:43,586 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 17:38:43,586 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-08 17:38:43,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 17:38:43,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 17:38:43,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 17:38:43,588 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-08 17:38:43,589 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-08 17:38:43,589 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-08 17:38:43,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 17:38:43,589 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-08 17:38:43,589 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-08 17:38:43,589 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-08 17:38:43,590 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 17:38:43,590 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 17:38:43,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 17:38:43,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 17:38:43,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 17:38:43,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 17:38:43,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 17:38:43,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 17:38:43,592 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-08 17:38:43,592 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-08 17:38:43,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 17:38:43,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-08 17:38:43,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-08 17:38:43,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 17:38:44,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 17:38:44,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 17:38:44,037 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 17:38:44,037 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 17:38:44,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2021-10-08 17:38:44,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f016759db/e19b06b3dc7a49b7851613c73501d194/FLAG634d53d2f [2021-10-08 17:38:44,765 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 17:38:44,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2021-10-08 17:38:44,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f016759db/e19b06b3dc7a49b7851613c73501d194/FLAG634d53d2f [2021-10-08 17:38:45,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f016759db/e19b06b3dc7a49b7851613c73501d194 [2021-10-08 17:38:45,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 17:38:45,146 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-08 17:38:45,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 17:38:45,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 17:38:45,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 17:38:45,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 05:38:45" (1/1) ... [2021-10-08 17:38:45,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@452f64a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:38:45, skipping insertion in model container [2021-10-08 17:38:45,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 05:38:45" (1/1) ... [2021-10-08 17:38:45,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 17:38:45,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 17:38:45,373 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-min-max-inc.wvr.c[2619,2632] [2021-10-08 17:38:45,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:38:45,396 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-08 17:38:45,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 17:38:45,424 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-min-max-inc.wvr.c[2619,2632] [2021-10-08 17:38:45,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:38:45,447 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 17:38:45,491 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-min-max-inc.wvr.c[2619,2632] [2021-10-08 17:38:45,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:38:45,527 INFO L208 MainTranslator]: Completed translation [2021-10-08 17:38:45,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:38:45 WrapperNode [2021-10-08 17:38:45,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 17:38:45,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 17:38:45,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 17:38:45,529 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 17:38:45,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:38:45" (1/1) ... [2021-10-08 17:38:45,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:38:45" (1/1) ... [2021-10-08 17:38:45,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 17:38:45,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 17:38:45,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 17:38:45,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 17:38:45,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:38:45" (1/1) ... [2021-10-08 17:38:45,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:38:45" (1/1) ... [2021-10-08 17:38:45,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:38:45" (1/1) ... [2021-10-08 17:38:45,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:38:45" (1/1) ... [2021-10-08 17:38:45,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:38:45" (1/1) ... [2021-10-08 17:38:45,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:38:45" (1/1) ... [2021-10-08 17:38:45,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:38:45" (1/1) ... [2021-10-08 17:38:45,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 17:38:45,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 17:38:45,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 17:38:45,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 17:38:45,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:38:45" (1/1) ... [2021-10-08 17:38:45,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 17:38:45,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 17:38:45,676 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 17:38:45,690 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 17:38:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-08 17:38:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 17:38:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-08 17:38:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 17:38:45,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 17:38:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 17:38:45,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 17:38:45,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-08 17:38:45,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-08 17:38:45,759 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-08 17:38:45,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-08 17:38:45,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 17:38:45,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 17:38:45,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-08 17:38:45,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 17:38:45,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 17:38:45,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 17:38:45,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-08 17:38:45,762 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 17:38:46,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 17:38:46,919 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-08 17:38:46,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 05:38:46 BoogieIcfgContainer [2021-10-08 17:38:46,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 17:38:46,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 17:38:46,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 17:38:46,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 17:38:46,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 05:38:45" (1/3) ... [2021-10-08 17:38:46,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edb4b34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 05:38:46, skipping insertion in model container [2021-10-08 17:38:46,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:38:45" (2/3) ... [2021-10-08 17:38:46,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edb4b34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 05:38:46, skipping insertion in model container [2021-10-08 17:38:46,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 05:38:46" (3/3) ... [2021-10-08 17:38:46,932 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2021-10-08 17:38:46,938 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 17:38:46,939 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2021-10-08 17:38:46,939 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 17:38:46,983 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,984 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,984 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,984 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,985 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,985 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,985 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,985 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,985 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,986 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,986 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,986 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,986 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,987 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,987 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,987 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,987 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,987 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,988 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,988 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,988 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,989 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,989 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,989 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,989 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,990 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,990 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,990 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,990 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,991 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,991 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,991 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,992 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,992 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,992 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,992 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,993 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,993 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,993 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,993 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,993 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,994 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,994 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,994 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,994 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,994 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,995 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,995 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,995 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,995 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,995 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,996 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,996 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,996 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,996 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,996 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,997 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,997 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,998 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,998 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,998 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,999 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,999 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,999 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:46,999 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,000 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,000 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,000 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,000 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,000 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,001 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,001 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,001 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,001 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,002 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,002 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,002 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,002 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,003 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,003 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,003 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,003 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,004 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,004 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,004 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,004 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,005 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,005 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,005 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,006 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,006 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,006 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,006 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,007 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,007 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,007 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,007 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,007 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,008 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,008 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,008 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,008 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,008 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,009 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,009 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,009 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,009 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,009 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,010 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,010 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,010 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,010 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,011 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,011 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,011 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,011 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,012 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,012 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,012 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,012 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,012 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,013 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,013 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,013 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,013 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,013 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,014 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,014 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,014 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,014 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,014 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,014 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,015 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,015 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,015 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,016 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,016 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,016 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,016 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,016 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,016 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,017 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,017 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,017 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,017 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,017 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,017 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,018 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,018 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,018 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,018 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,018 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,018 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,019 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,019 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,019 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,019 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,019 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,019 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,020 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,020 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,020 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,020 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,021 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,021 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,021 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,021 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,021 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,022 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,022 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,022 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,022 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,022 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,022 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,023 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,023 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,023 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,023 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,024 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,024 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,024 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,024 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,024 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,025 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,025 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,025 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,025 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,025 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,026 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,026 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,026 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,026 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,026 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,027 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,030 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,030 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,030 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,030 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,030 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,031 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,031 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,031 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,033 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,033 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,033 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,033 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,034 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,034 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,034 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,034 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,034 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,036 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,036 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,037 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,037 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,037 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,037 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,037 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,038 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,040 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,040 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,040 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,040 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:38:47,048 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-08 17:38:47,116 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 17:38:47,127 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 17:38:47,127 INFO L340 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2021-10-08 17:38:47,152 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 17:38:47,164 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 224 transitions, 480 flow [2021-10-08 17:38:47,168 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 224 transitions, 480 flow [2021-10-08 17:38:47,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 222 places, 224 transitions, 480 flow [2021-10-08 17:38:47,279 INFO L129 PetriNetUnfolder]: 15/220 cut-off events. [2021-10-08 17:38:47,279 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-08 17:38:47,289 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 220 events. 15/220 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 434 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 172. Up to 2 conditions per place. [2021-10-08 17:38:47,300 INFO L116 LiptonReduction]: Number of co-enabled transitions 9156 [2021-10-08 17:39:17,492 INFO L131 LiptonReduction]: Checked pairs total: 19352 [2021-10-08 17:39:17,493 INFO L133 LiptonReduction]: Total number of compositions: 226 [2021-10-08 17:39:17,503 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 91 places, 85 transitions, 202 flow [2021-10-08 17:39:19,209 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30706 states, 28760 states have (on average 4.933901251738526) internal successors, (141899), 30705 states have internal predecessors, (141899), 0 states have call successors, (0), 0 states 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 17:39:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 30706 states, 28760 states have (on average 4.933901251738526) internal successors, (141899), 30705 states have internal predecessors, (141899), 0 states have call successors, (0), 0 states 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 17:39:19,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 17:39:19,290 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:39:19,290 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 17:39:19,291 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:39:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:39:19,299 INFO L82 PathProgramCache]: Analyzing trace with hash 28395, now seen corresponding path program 1 times [2021-10-08 17:39:19,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:39:19,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598673663] [2021-10-08 17:39:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:39:19,317 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:39:19,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:39:19,320 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 17:39:19,323 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 17:39:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:39:19,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 17:39:19,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:39:19,579 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 17:39:19,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:39:19,592 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 17:39:19,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:39:19,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598673663] [2021-10-08 17:39:19,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598673663] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:39:19,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:39:19,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:39:19,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680572526] [2021-10-08 17:39:19,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:39:19,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:39:19,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:39:19,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:39:19,728 INFO L87 Difference]: Start difference. First operand has 30706 states, 28760 states have (on average 4.933901251738526) internal successors, (141899), 30705 states have internal predecessors, (141899), 0 states have call successors, (0), 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 17:39:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:39:20,482 INFO L93 Difference]: Finished difference Result 12948 states and 56417 transitions. [2021-10-08 17:39:20,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:39:20,491 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 17:39:20,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:39:20,920 INFO L225 Difference]: With dead ends: 12948 [2021-10-08 17:39:20,920 INFO L226 Difference]: Without dead ends: 12948 [2021-10-08 17:39:20,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:39:21,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12948 states. [2021-10-08 17:39:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12948 to 12946. [2021-10-08 17:39:22,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12946 states, 12469 states have (on average 4.524580960782742) internal successors, (56417), 12945 states have internal predecessors, (56417), 0 states have call successors, (0), 0 states 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 17:39:22,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12946 states to 12946 states and 56417 transitions. [2021-10-08 17:39:22,256 INFO L78 Accepts]: Start accepts. Automaton has 12946 states and 56417 transitions. Word has length 2 [2021-10-08 17:39:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:39:22,256 INFO L470 AbstractCegarLoop]: Abstraction has 12946 states and 56417 transitions. [2021-10-08 17:39:22,257 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 17:39:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 12946 states and 56417 transitions. [2021-10-08 17:39:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 17:39:22,260 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:39:22,260 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 17:39:22,283 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 17:39:22,470 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 17:39:22,471 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:39:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:39:22,473 INFO L82 PathProgramCache]: Analyzing trace with hash 28288, now seen corresponding path program 1 times [2021-10-08 17:39:22,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:39:22,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554389327] [2021-10-08 17:39:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:39:22,475 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:39:22,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:39:22,476 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 17:39:22,477 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 17:39:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:39:22,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 17:39:22,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:39:22,656 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-10-08 17:39:22,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 38 [2021-10-08 17:39:22,781 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 17:39:22,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:39:22,787 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 17:39:22,788 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:39:22,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554389327] [2021-10-08 17:39:22,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554389327] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:39:22,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:39:22,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 17:39:22,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095918344] [2021-10-08 17:39:22,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 17:39:22,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:39:22,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 17:39:22,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:39:22,793 INFO L87 Difference]: Start difference. First operand 12946 states and 56417 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 17:39:23,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:39:23,335 INFO L93 Difference]: Finished difference Result 12945 states and 56415 transitions. [2021-10-08 17:39:23,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:39:23,336 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 17:39:23,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:39:23,563 INFO L225 Difference]: With dead ends: 12945 [2021-10-08 17:39:23,563 INFO L226 Difference]: Without dead ends: 12945 [2021-10-08 17:39:23,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:39:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12945 states. [2021-10-08 17:39:24,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12945 to 12945. [2021-10-08 17:39:24,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 12469 states have (on average 4.524420562996231) internal successors, (56415), 12944 states have internal predecessors, (56415), 0 states have call successors, (0), 0 states 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 17:39:24,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 56415 transitions. [2021-10-08 17:39:24,843 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 56415 transitions. Word has length 2 [2021-10-08 17:39:24,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:39:24,843 INFO L470 AbstractCegarLoop]: Abstraction has 12945 states and 56415 transitions. [2021-10-08 17:39:24,844 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 17:39:24,844 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 56415 transitions. [2021-10-08 17:39:24,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 17:39:24,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:39:24,844 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 17:39:24,867 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 17:39:25,045 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 17:39:25,045 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:39:25,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:39:25,046 INFO L82 PathProgramCache]: Analyzing trace with hash 28289, now seen corresponding path program 1 times [2021-10-08 17:39:25,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:39:25,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457000159] [2021-10-08 17:39:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:39:25,048 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:39:25,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:39:25,050 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 17:39:25,095 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 17:39:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:39:25,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 17:39:25,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:39:25,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:39:25,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:39:25,726 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:39:25,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-08 17:39:25,845 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 17:39:25,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:39:26,026 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 17:39:26,027 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:39:26,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457000159] [2021-10-08 17:39:26,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457000159] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:39:26,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:39:26,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:39:26,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674134272] [2021-10-08 17:39:26,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:39:26,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:39:26,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:39:26,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:39:26,029 INFO L87 Difference]: Start difference. First operand 12945 states and 56415 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 17:39:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:39:27,050 INFO L93 Difference]: Finished difference Result 12946 states and 56418 transitions. [2021-10-08 17:39:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:39:27,052 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 17:39:27,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:39:27,154 INFO L225 Difference]: With dead ends: 12946 [2021-10-08 17:39:27,155 INFO L226 Difference]: Without dead ends: 12946 [2021-10-08 17:39:27,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:39:27,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12946 states. [2021-10-08 17:39:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12946 to 12946. [2021-10-08 17:39:27,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12946 states, 12470 states have (on average 4.5242983159583) internal successors, (56418), 12945 states have internal predecessors, (56418), 0 states have call successors, (0), 0 states 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 17:39:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12946 states to 12946 states and 56418 transitions. [2021-10-08 17:39:28,040 INFO L78 Accepts]: Start accepts. Automaton has 12946 states and 56418 transitions. Word has length 2 [2021-10-08 17:39:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:39:28,040 INFO L470 AbstractCegarLoop]: Abstraction has 12946 states and 56418 transitions. [2021-10-08 17:39:28,040 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 17:39:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 12946 states and 56418 transitions. [2021-10-08 17:39:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 17:39:28,041 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:39:28,041 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 17:39:28,056 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 17:39:28,252 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 17:39:28,253 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:39:28,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:39:28,255 INFO L82 PathProgramCache]: Analyzing trace with hash 881577, now seen corresponding path program 1 times [2021-10-08 17:39:28,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:39:28,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574443981] [2021-10-08 17:39:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:39:28,256 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:39:28,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:39:28,257 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 17:39:28,260 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 17:39:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:39:28,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-08 17:39:28,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:39:28,452 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-10-08 17:39:28,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 76 [2021-10-08 17:39:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:39:28,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:39:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:39:28,755 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:39:28,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574443981] [2021-10-08 17:39:28,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574443981] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:39:28,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:39:28,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:39:28,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944025908] [2021-10-08 17:39:28,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:39:28,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:39:28,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:39:28,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:39:28,757 INFO L87 Difference]: Start difference. First operand 12946 states and 56418 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:39:29,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:39:29,300 INFO L93 Difference]: Finished difference Result 10785 states and 45976 transitions. [2021-10-08 17:39:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:39:29,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-08 17:39:29,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:39:29,378 INFO L225 Difference]: With dead ends: 10785 [2021-10-08 17:39:29,378 INFO L226 Difference]: Without dead ends: 10785 [2021-10-08 17:39:29,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:39:29,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10785 states. [2021-10-08 17:39:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10785 to 10785. [2021-10-08 17:39:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10785 states, 10385 states have (on average 4.427154549831488) internal successors, (45976), 10784 states have internal predecessors, (45976), 0 states have call successors, (0), 0 states 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 17:39:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10785 states to 10785 states and 45976 transitions. [2021-10-08 17:39:29,861 INFO L78 Accepts]: Start accepts. Automaton has 10785 states and 45976 transitions. Word has length 3 [2021-10-08 17:39:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:39:29,861 INFO L470 AbstractCegarLoop]: Abstraction has 10785 states and 45976 transitions. [2021-10-08 17:39:29,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:39:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 10785 states and 45976 transitions. [2021-10-08 17:39:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 17:39:29,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:39:29,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 17:39:29,872 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 17:39:30,070 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 17:39:30,071 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:39:30,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:39:30,072 INFO L82 PathProgramCache]: Analyzing trace with hash 881579, now seen corresponding path program 1 times [2021-10-08 17:39:30,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:39:30,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620300886] [2021-10-08 17:39:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:39:30,076 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:39:30,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:39:30,077 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 17:39:30,078 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 17:39:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:39:30,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 17:39:30,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:39:30,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:39:30,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:39:30,742 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:39:30,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 127 [2021-10-08 17:39:30,757 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-08 17:39:30,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 127 [2021-10-08 17:39:36,023 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 17:39:36,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:39:36,189 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 17:39:36,190 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:39:36,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620300886] [2021-10-08 17:39:36,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620300886] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:39:36,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:39:36,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-08 17:39:36,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985459756] [2021-10-08 17:39:36,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 17:39:36,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:39:36,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 17:39:36,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:39:36,192 INFO L87 Difference]: Start difference. First operand 10785 states and 45976 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:39:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:39:37,227 INFO L93 Difference]: Finished difference Result 19407 states and 81508 transitions. [2021-10-08 17:39:37,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-08 17:39:37,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-08 17:39:37,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:39:37,393 INFO L225 Difference]: With dead ends: 19407 [2021-10-08 17:39:37,393 INFO L226 Difference]: Without dead ends: 19407 [2021-10-08 17:39:37,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-08 17:39:37,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19407 states. [2021-10-08 17:39:38,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19407 to 14700. [2021-10-08 17:39:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14700 states, 14300 states have (on average 4.554965034965035) internal successors, (65136), 14699 states have internal predecessors, (65136), 0 states have call successors, (0), 0 states 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 17:39:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14700 states to 14700 states and 65136 transitions. [2021-10-08 17:39:38,376 INFO L78 Accepts]: Start accepts. Automaton has 14700 states and 65136 transitions. Word has length 3 [2021-10-08 17:39:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:39:38,376 INFO L470 AbstractCegarLoop]: Abstraction has 14700 states and 65136 transitions. [2021-10-08 17:39:38,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:39:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 14700 states and 65136 transitions. [2021-10-08 17:39:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 17:39:38,377 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:39:38,377 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-08 17:39:38,393 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 17:39:38,590 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 17:39:38,593 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:39:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:39:38,596 INFO L82 PathProgramCache]: Analyzing trace with hash 27330113, now seen corresponding path program 1 times [2021-10-08 17:39:38,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:39:38,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833109443] [2021-10-08 17:39:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:39:38,597 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:39:38,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:39:38,598 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 17:39:38,599 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 17:39:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:39:38,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 17:39:38,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:39:38,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:39:38,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:39:39,010 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:39:39,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-08 17:39:39,162 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 17:39:39,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:39:39,553 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 17:39:39,554 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:39:39,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833109443] [2021-10-08 17:39:39,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833109443] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:39:39,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:39:39,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 17:39:39,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617151261] [2021-10-08 17:39:39,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:39:39,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:39:39,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:39:39,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:39:39,555 INFO L87 Difference]: Start difference. First operand 14700 states and 65136 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 17:39:42,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:39:42,372 INFO L93 Difference]: Finished difference Result 51746 states and 219413 transitions. [2021-10-08 17:39:42,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 17:39:42,374 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 17:39:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:39:42,809 INFO L225 Difference]: With dead ends: 51746 [2021-10-08 17:39:42,809 INFO L226 Difference]: Without dead ends: 51746 [2021-10-08 17:39:42,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 657.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:39:42,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51746 states. [2021-10-08 17:39:44,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51746 to 14702. [2021-10-08 17:39:44,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14702 states, 14302 states have (on average 4.5546077471682285) internal successors, (65140), 14701 states have internal predecessors, (65140), 0 states have call successors, (0), 0 states 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 17:39:44,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14702 states to 14702 states and 65140 transitions. [2021-10-08 17:39:44,520 INFO L78 Accepts]: Start accepts. Automaton has 14702 states and 65140 transitions. Word has length 4 [2021-10-08 17:39:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:39:44,521 INFO L470 AbstractCegarLoop]: Abstraction has 14702 states and 65140 transitions. [2021-10-08 17:39:44,521 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 17:39:44,521 INFO L276 IsEmpty]: Start isEmpty. Operand 14702 states and 65140 transitions. [2021-10-08 17:39:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 17:39:44,522 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:39:44,522 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 17:39:44,539 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 17:39:44,738 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 17:39:44,742 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:39:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:39:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash 847216603, now seen corresponding path program 1 times [2021-10-08 17:39:44,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:39:44,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696129657] [2021-10-08 17:39:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:39:44,743 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:39:44,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:39:44,745 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 17:39:44,754 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 17:39:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:39:44,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 17:39:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:39:45,243 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:39:45,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 124 [2021-10-08 17:39:45,256 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-08 17:39:45,256 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 129 treesize of output 125 [2021-10-08 17:39:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:39:55,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:39:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:39:55,530 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:39:55,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696129657] [2021-10-08 17:39:55,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696129657] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:39:55,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:39:55,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:39:55,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237826856] [2021-10-08 17:39:55,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:39:55,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:39:55,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:39:55,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:39:55,532 INFO L87 Difference]: Start difference. First operand 14702 states and 65140 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:39:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:39:56,067 INFO L93 Difference]: Finished difference Result 14510 states and 64428 transitions. [2021-10-08 17:39:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:39:56,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-08 17:39:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:39:56,131 INFO L225 Difference]: With dead ends: 14510 [2021-10-08 17:39:56,132 INFO L226 Difference]: Without dead ends: 14510 [2021-10-08 17:39:56,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:39:56,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14510 states. [2021-10-08 17:39:56,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14510 to 14510. [2021-10-08 17:39:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14510 states, 14130 states have (on average 4.559660297239915) internal successors, (64428), 14509 states have internal predecessors, (64428), 0 states have call successors, (0), 0 states 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 17:39:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14510 states to 14510 states and 64428 transitions. [2021-10-08 17:39:56,763 INFO L78 Accepts]: Start accepts. Automaton has 14510 states and 64428 transitions. Word has length 5 [2021-10-08 17:39:56,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:39:56,764 INFO L470 AbstractCegarLoop]: Abstraction has 14510 states and 64428 transitions. [2021-10-08 17:39:56,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:39:56,764 INFO L276 IsEmpty]: Start isEmpty. Operand 14510 states and 64428 transitions. [2021-10-08 17:39:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 17:39:56,764 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:39:56,764 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 17:39:56,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-08 17:39:56,965 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 17:39:56,966 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:39:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:39:56,967 INFO L82 PathProgramCache]: Analyzing trace with hash 847216311, now seen corresponding path program 1 times [2021-10-08 17:39:56,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:39:56,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029650960] [2021-10-08 17:39:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:39:56,968 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:39:56,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:39:56,970 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 17:39:56,970 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 17:39:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:39:57,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:39:57,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:39:57,137 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-10-08 17:39:57,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 38 [2021-10-08 17:39:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:39:57,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:39:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:39:57,202 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:39:57,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029650960] [2021-10-08 17:39:57,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029650960] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:39:57,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:39:57,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-08 17:39:57,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022026175] [2021-10-08 17:39:57,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:39:57,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:39:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:39:57,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:39:57,205 INFO L87 Difference]: Start difference. First operand 14510 states and 64428 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:39:57,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:39:57,428 INFO L93 Difference]: Finished difference Result 8284 states and 36801 transitions. [2021-10-08 17:39:57,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:39:57,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-08 17:39:57,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:39:57,459 INFO L225 Difference]: With dead ends: 8284 [2021-10-08 17:39:57,460 INFO L226 Difference]: Without dead ends: 8284 [2021-10-08 17:39:57,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-08 17:39:57,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8284 states. [2021-10-08 17:39:57,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8284 to 8284. [2021-10-08 17:39:57,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8284 states, 8177 states have (on average 4.500550324079736) internal successors, (36801), 8283 states have internal predecessors, (36801), 0 states have call successors, (0), 0 states 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 17:39:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 36801 transitions. [2021-10-08 17:39:57,934 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 36801 transitions. Word has length 5 [2021-10-08 17:39:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:39:57,934 INFO L470 AbstractCegarLoop]: Abstraction has 8284 states and 36801 transitions. [2021-10-08 17:39:57,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:39:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 36801 transitions. [2021-10-08 17:39:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 17:39:57,935 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:39:57,935 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 17:39:57,944 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 17:39:58,142 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 17:39:58,144 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:39:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:39:58,145 INFO L82 PathProgramCache]: Analyzing trace with hash 847216312, now seen corresponding path program 1 times [2021-10-08 17:39:58,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:39:58,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174366861] [2021-10-08 17:39:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:39:58,146 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:39:58,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:39:58,147 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 17:39:58,150 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 17:39:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:39:58,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 17:39:58,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:39:58,297 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 17:39:58,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:39:58,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-08 17:39:58,481 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 17:39:58,481 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:39:58,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174366861] [2021-10-08 17:39:58,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174366861] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:39:58,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:39:58,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 17:39:58,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21485064] [2021-10-08 17:39:58,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:39:58,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:39:58,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:39:58,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:39:58,483 INFO L87 Difference]: Start difference. First operand 8284 states and 36801 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:39:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:39:58,956 INFO L93 Difference]: Finished difference Result 8938 states and 37730 transitions. [2021-10-08 17:39:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 17:39:58,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-08 17:39:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:39:58,997 INFO L225 Difference]: With dead ends: 8938 [2021-10-08 17:39:58,997 INFO L226 Difference]: Without dead ends: 8938 [2021-10-08 17:39:58,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-08 17:39:59,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8938 states. [2021-10-08 17:39:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8938 to 6761. [2021-10-08 17:39:59,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6761 states, 6707 states have (on average 4.490532279707768) internal successors, (30118), 6760 states have internal predecessors, (30118), 0 states have call successors, (0), 0 states 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 17:39:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6761 states to 6761 states and 30118 transitions. [2021-10-08 17:39:59,399 INFO L78 Accepts]: Start accepts. Automaton has 6761 states and 30118 transitions. Word has length 5 [2021-10-08 17:39:59,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:39:59,399 INFO L470 AbstractCegarLoop]: Abstraction has 6761 states and 30118 transitions. [2021-10-08 17:39:59,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:39:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 6761 states and 30118 transitions. [2021-10-08 17:39:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 17:39:59,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:39:59,400 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 17:39:59,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-10-08 17:39:59,600 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 17:39:59,601 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:39:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:39:59,602 INFO L82 PathProgramCache]: Analyzing trace with hash 847216602, now seen corresponding path program 1 times [2021-10-08 17:39:59,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:39:59,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065929249] [2021-10-08 17:39:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:39:59,604 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:39:59,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:39:59,605 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 17:39:59,606 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 17:39:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:39:59,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:39:59,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:39:59,787 INFO L354 Elim1Store]: treesize reduction 160, result has 17.1 percent of original size [2021-10-08 17:39:59,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 53 treesize of output 68 [2021-10-08 17:40:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:40:00,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:40:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:40:00,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:40:00,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065929249] [2021-10-08 17:40:00,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065929249] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:40:00,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:40:00,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:40:00,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198044815] [2021-10-08 17:40:00,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:40:00,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:40:00,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:40:00,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:40:00,146 INFO L87 Difference]: Start difference. First operand 6761 states and 30118 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:40:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:40:00,357 INFO L93 Difference]: Finished difference Result 6644 states and 29682 transitions. [2021-10-08 17:40:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:40:00,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-08 17:40:00,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:40:00,383 INFO L225 Difference]: With dead ends: 6644 [2021-10-08 17:40:00,384 INFO L226 Difference]: Without dead ends: 6644 [2021-10-08 17:40:00,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:40:00,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2021-10-08 17:40:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 6644. [2021-10-08 17:40:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6644 states, 6596 states have (on average 4.5) internal successors, (29682), 6643 states have internal predecessors, (29682), 0 states have call successors, (0), 0 states 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 17:40:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6644 states to 6644 states and 29682 transitions. [2021-10-08 17:40:00,684 INFO L78 Accepts]: Start accepts. Automaton has 6644 states and 29682 transitions. Word has length 5 [2021-10-08 17:40:00,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:40:00,684 INFO L470 AbstractCegarLoop]: Abstraction has 6644 states and 29682 transitions. [2021-10-08 17:40:00,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:40:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 6644 states and 29682 transitions. [2021-10-08 17:40:00,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 17:40:00,685 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:40:00,685 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1] [2021-10-08 17:40:00,694 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 17:40:00,885 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 17:40:00,886 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:40:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:40:00,887 INFO L82 PathProgramCache]: Analyzing trace with hash 494579309, now seen corresponding path program 2 times [2021-10-08 17:40:00,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:40:00,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183768706] [2021-10-08 17:40:00,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:40:00,889 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:40:00,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:40:00,890 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 17:40:00,890 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 17:40:00,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 17:40:00,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:40:00,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-08 17:40:00,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:40:01,367 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:40:01,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 133 [2021-10-08 17:40:01,380 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-08 17:40:01,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 133 [2021-10-08 17:40:12,098 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 17:40:12,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:40:12,185 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 17:40:12,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:40:12,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183768706] [2021-10-08 17:40:12,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183768706] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:40:12,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:40:12,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:40:12,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077593142] [2021-10-08 17:40:12,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:40:12,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:40:12,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:40:12,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:40:12,187 INFO L87 Difference]: Start difference. First operand 6644 states and 29682 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:40:12,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:40:12,600 INFO L93 Difference]: Finished difference Result 5671 states and 24927 transitions. [2021-10-08 17:40:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:40:12,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-08 17:40:12,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:40:12,620 INFO L225 Difference]: With dead ends: 5671 [2021-10-08 17:40:12,620 INFO L226 Difference]: Without dead ends: 5671 [2021-10-08 17:40:12,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:40:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5671 states. [2021-10-08 17:40:12,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5671 to 3870. [2021-10-08 17:40:12,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3831 states have (on average 4.194205168363352) internal successors, (16068), 3869 states have internal predecessors, (16068), 0 states have call successors, (0), 0 states 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 17:40:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 16068 transitions. [2021-10-08 17:40:12,738 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 16068 transitions. Word has length 6 [2021-10-08 17:40:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:40:12,738 INFO L470 AbstractCegarLoop]: Abstraction has 3870 states and 16068 transitions. [2021-10-08 17:40:12,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:40:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 16068 transitions. [2021-10-08 17:40:12,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 17:40:12,739 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:40:12,739 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:40:12,748 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 17:40:12,946 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 17:40:12,947 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:40:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:40:12,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1868612426, now seen corresponding path program 1 times [2021-10-08 17:40:12,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:40:12,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022754021] [2021-10-08 17:40:12,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:40:12,949 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:40:12,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:40:12,950 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 17:40:12,951 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 17:40:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:40:13,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 17:40:13,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:40:13,166 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-10-08 17:40:13,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 57 [2021-10-08 17:40:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:40:13,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:40:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:40:13,608 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:40:13,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022754021] [2021-10-08 17:40:13,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022754021] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:40:13,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:40:13,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:40:13,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865794656] [2021-10-08 17:40:13,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:40:13,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:40:13,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:40:13,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:40:13,611 INFO L87 Difference]: Start difference. First operand 3870 states and 16068 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:40:13,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:40:13,753 INFO L93 Difference]: Finished difference Result 3777 states and 15775 transitions. [2021-10-08 17:40:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:40:13,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-08 17:40:13,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:40:13,768 INFO L225 Difference]: With dead ends: 3777 [2021-10-08 17:40:13,768 INFO L226 Difference]: Without dead ends: 3777 [2021-10-08 17:40:13,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:40:13,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2021-10-08 17:40:13,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3777. [2021-10-08 17:40:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3744 states have (on average 4.213408119658119) internal successors, (15775), 3776 states have internal predecessors, (15775), 0 states have call successors, (0), 0 states 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 17:40:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 15775 transitions. [2021-10-08 17:40:13,865 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 15775 transitions. Word has length 7 [2021-10-08 17:40:13,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:40:13,865 INFO L470 AbstractCegarLoop]: Abstraction has 3777 states and 15775 transitions. [2021-10-08 17:40:13,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:40:13,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 15775 transitions. [2021-10-08 17:40:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 17:40:13,866 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:40:13,866 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:40:13,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-08 17:40:14,067 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 17:40:14,068 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:40:14,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:40:14,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1868612425, now seen corresponding path program 1 times [2021-10-08 17:40:14,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:40:14,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599195438] [2021-10-08 17:40:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:40:14,070 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:40:14,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:40:14,071 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 17:40:14,072 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 17:40:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:40:14,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 17:40:14,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:40:14,556 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:40:14,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 113 [2021-10-08 17:40:14,562 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 116 treesize of output 114 [2021-10-08 17:40:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:40:35,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:40:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:40:35,167 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:40:35,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599195438] [2021-10-08 17:40:35,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599195438] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:40:35,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:40:35,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:40:35,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092498196] [2021-10-08 17:40:35,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:40:35,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:40:35,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:40:35,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:40:35,170 INFO L87 Difference]: Start difference. First operand 3777 states and 15775 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:40:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:40:35,389 INFO L93 Difference]: Finished difference Result 3684 states and 15482 transitions. [2021-10-08 17:40:35,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:40:35,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-08 17:40:35,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:40:35,404 INFO L225 Difference]: With dead ends: 3684 [2021-10-08 17:40:35,404 INFO L226 Difference]: Without dead ends: 3684 [2021-10-08 17:40:35,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:40:35,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3684 states. [2021-10-08 17:40:35,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3684 to 3684. [2021-10-08 17:40:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3684 states, 3657 states have (on average 4.233524747060432) internal successors, (15482), 3683 states have internal predecessors, (15482), 0 states have call successors, (0), 0 states 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 17:40:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3684 states to 3684 states and 15482 transitions. [2021-10-08 17:40:35,502 INFO L78 Accepts]: Start accepts. Automaton has 3684 states and 15482 transitions. Word has length 7 [2021-10-08 17:40:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:40:35,503 INFO L470 AbstractCegarLoop]: Abstraction has 3684 states and 15482 transitions. [2021-10-08 17:40:35,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:40:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 3684 states and 15482 transitions. [2021-10-08 17:40:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 17:40:35,503 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:40:35,503 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-08 17:40:35,514 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 17:40:35,705 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 17:40:35,706 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:40:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:40:35,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1450613311, now seen corresponding path program 2 times [2021-10-08 17:40:35,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:40:35,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398031039] [2021-10-08 17:40:35,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:40:35,708 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:40:35,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:40:35,709 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 17:40:35,712 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 17:40:35,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:40:35,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:40:35,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 17:40:35,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:40:35,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:40:35,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:40:36,249 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:40:36,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-08 17:40:36,680 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 17:40:36,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:40:38,056 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 17:40:38,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:40:38,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398031039] [2021-10-08 17:40:38,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398031039] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:40:38,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:40:38,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 17:40:38,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535271319] [2021-10-08 17:40:38,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 17:40:38,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:40:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 17:40:38,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:40:38,058 INFO L87 Difference]: Start difference. First operand 3684 states and 15482 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 17:40:47,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:40:47,847 INFO L93 Difference]: Finished difference Result 47792 states and 201102 transitions. [2021-10-08 17:40:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-08 17:40:47,849 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 17:40:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:40:48,092 INFO L225 Difference]: With dead ends: 47792 [2021-10-08 17:40:48,092 INFO L226 Difference]: Without dead ends: 47792 [2021-10-08 17:40:48,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5229.6ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-08 17:40:48,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47792 states. [2021-10-08 17:40:48,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47792 to 3692. [2021-10-08 17:40:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3692 states, 3665 states have (on average 4.228649386084584) internal successors, (15498), 3691 states have internal predecessors, (15498), 0 states have call successors, (0), 0 states 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 17:40:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3692 states to 3692 states and 15498 transitions. [2021-10-08 17:40:48,670 INFO L78 Accepts]: Start accepts. Automaton has 3692 states and 15498 transitions. Word has length 8 [2021-10-08 17:40:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:40:48,671 INFO L470 AbstractCegarLoop]: Abstraction has 3692 states and 15498 transitions. [2021-10-08 17:40:48,671 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 17:40:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 3692 states and 15498 transitions. [2021-10-08 17:40:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 17:40:48,672 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:40:48,672 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:40:48,683 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 17:40:48,876 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 17:40:48,877 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:40:48,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:40:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2101034069, now seen corresponding path program 1 times [2021-10-08 17:40:48,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:40:48,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065594772] [2021-10-08 17:40:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:40:48,880 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:40:48,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:40:48,881 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 17:40:48,882 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 17:40:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:40:49,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-08 17:40:49,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:40:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:40:49,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:40:49,219 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 17:40:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:40:49,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:40:49,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065594772] [2021-10-08 17:40:49,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065594772] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:40:49,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:40:49,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-10-08 17:40:49,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332662849] [2021-10-08 17:40:49,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:40:49,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:40:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:40:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:40:49,293 INFO L87 Difference]: Start difference. First operand 3692 states and 15498 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 17:40:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:40:49,944 INFO L93 Difference]: Finished difference Result 5876 states and 24783 transitions. [2021-10-08 17:40:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-08 17:40:49,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 17:40:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:40:49,967 INFO L225 Difference]: With dead ends: 5876 [2021-10-08 17:40:49,967 INFO L226 Difference]: Without dead ends: 5876 [2021-10-08 17:40:49,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-10-08 17:40:49,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5876 states. [2021-10-08 17:40:50,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5876 to 4072. [2021-10-08 17:40:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4072 states, 4045 states have (on average 4.408899876390605) internal successors, (17834), 4071 states have internal predecessors, (17834), 0 states have call successors, (0), 0 states 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 17:40:50,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 17834 transitions. [2021-10-08 17:40:50,137 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 17834 transitions. Word has length 8 [2021-10-08 17:40:50,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:40:50,138 INFO L470 AbstractCegarLoop]: Abstraction has 4072 states and 17834 transitions. [2021-10-08 17:40:50,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 17:40:50,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 17834 transitions. [2021-10-08 17:40:50,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 17:40:50,139 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:40:50,139 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:40:50,149 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 17:40:50,340 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 17:40:50,341 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:40:50,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:40:50,342 INFO L82 PathProgramCache]: Analyzing trace with hash -440189553, now seen corresponding path program 1 times [2021-10-08 17:40:50,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:40:50,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118783541] [2021-10-08 17:40:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:40:50,343 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:40:50,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:40:50,344 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 17:40:50,345 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 17:40:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:40:50,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 17:40:50,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:40:50,633 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-10-08 17:40:50,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 38 [2021-10-08 17:40:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:40:50,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:40:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:40:50,717 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:40:50,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118783541] [2021-10-08 17:40:50,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118783541] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:40:50,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:40:50,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 17:40:50,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554849932] [2021-10-08 17:40:50,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 17:40:50,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:40:50,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 17:40:50,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:40:50,719 INFO L87 Difference]: Start difference. First operand 4072 states and 17834 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 17:40:50,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:40:50,849 INFO L93 Difference]: Finished difference Result 3709 states and 16241 transitions. [2021-10-08 17:40:50,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:40:50,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 9 [2021-10-08 17:40:50,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:40:50,864 INFO L225 Difference]: With dead ends: 3709 [2021-10-08 17:40:50,864 INFO L226 Difference]: Without dead ends: 3709 [2021-10-08 17:40:50,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:40:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2021-10-08 17:40:50,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 3709. [2021-10-08 17:40:50,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3709 states, 3691 states have (on average 4.400162557572473) internal successors, (16241), 3708 states have internal predecessors, (16241), 0 states have call successors, (0), 0 states 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 17:40:50,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3709 states to 3709 states and 16241 transitions. [2021-10-08 17:40:50,976 INFO L78 Accepts]: Start accepts. Automaton has 3709 states and 16241 transitions. Word has length 9 [2021-10-08 17:40:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:40:50,976 INFO L470 AbstractCegarLoop]: Abstraction has 3709 states and 16241 transitions. [2021-10-08 17:40:50,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 17:40:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3709 states and 16241 transitions. [2021-10-08 17:40:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 17:40:50,977 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:40:50,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:40:50,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-08 17:40:51,190 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 17:40:51,191 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:40:51,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:40:51,192 INFO L82 PathProgramCache]: Analyzing trace with hash -440189552, now seen corresponding path program 1 times [2021-10-08 17:40:51,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:40:51,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996290389] [2021-10-08 17:40:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:40:51,194 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:40:51,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:40:51,195 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 17:40:51,196 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 17:40:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:40:51,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:40:51,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:40:51,721 INFO L354 Elim1Store]: treesize reduction 361, result has 15.5 percent of original size [2021-10-08 17:40:51,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 92 [2021-10-08 17:40:51,726 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 96 treesize of output 94 [2021-10-08 17:40:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:40:53,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:40:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:40:54,032 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:40:54,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996290389] [2021-10-08 17:40:54,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996290389] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:40:54,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:40:54,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:40:54,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076971538] [2021-10-08 17:40:54,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:40:54,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:40:54,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:40:54,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:40:54,034 INFO L87 Difference]: Start difference. First operand 3709 states and 16241 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:40:54,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:40:54,227 INFO L93 Difference]: Finished difference Result 3346 states and 14648 transitions. [2021-10-08 17:40:54,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:40:54,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-08 17:40:54,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:40:54,241 INFO L225 Difference]: With dead ends: 3346 [2021-10-08 17:40:54,241 INFO L226 Difference]: Without dead ends: 3346 [2021-10-08 17:40:54,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:40:54,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2021-10-08 17:40:54,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 3346. [2021-10-08 17:40:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3346 states, 3337 states have (on average 4.389571471381481) internal successors, (14648), 3345 states have internal predecessors, (14648), 0 states have call successors, (0), 0 states 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 17:40:54,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3346 states to 3346 states and 14648 transitions. [2021-10-08 17:40:54,329 INFO L78 Accepts]: Start accepts. Automaton has 3346 states and 14648 transitions. Word has length 9 [2021-10-08 17:40:54,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:40:54,329 INFO L470 AbstractCegarLoop]: Abstraction has 3346 states and 14648 transitions. [2021-10-08 17:40:54,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:40:54,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3346 states and 14648 transitions. [2021-10-08 17:40:54,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 17:40:54,330 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:40:54,330 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:40:54,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-08 17:40:54,532 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 17:40:54,533 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:40:54,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:40:54,534 INFO L82 PathProgramCache]: Analyzing trace with hash -459025202, now seen corresponding path program 1 times [2021-10-08 17:40:54,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:40:54,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753194218] [2021-10-08 17:40:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:40:54,535 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:40:54,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:40:54,537 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 17:40:54,538 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 17:40:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:40:54,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 17:40:54,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:40:54,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:40:54,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:40:55,066 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:40:55,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-08 17:40:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:40:55,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:40:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:40:55,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:40:55,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753194218] [2021-10-08 17:40:55,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753194218] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:40:55,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:40:55,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 17:40:55,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763845357] [2021-10-08 17:40:55,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:40:55,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:40:55,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:40:55,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:40:55,944 INFO L87 Difference]: Start difference. First operand 3346 states and 14648 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:40:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:40:57,517 INFO L93 Difference]: Finished difference Result 7598 states and 33412 transitions. [2021-10-08 17:40:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 17:40:57,518 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-08 17:40:57,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:40:57,548 INFO L225 Difference]: With dead ends: 7598 [2021-10-08 17:40:57,549 INFO L226 Difference]: Without dead ends: 7598 [2021-10-08 17:40:57,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 787.2ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-08 17:40:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7598 states. [2021-10-08 17:40:57,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7598 to 7042. [2021-10-08 17:40:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7042 states, 7033 states have (on average 4.485710223233329) internal successors, (31548), 7041 states have internal predecessors, (31548), 0 states have call successors, (0), 0 states 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 17:40:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7042 states to 7042 states and 31548 transitions. [2021-10-08 17:40:57,749 INFO L78 Accepts]: Start accepts. Automaton has 7042 states and 31548 transitions. Word has length 10 [2021-10-08 17:40:57,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:40:57,749 INFO L470 AbstractCegarLoop]: Abstraction has 7042 states and 31548 transitions. [2021-10-08 17:40:57,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:40:57,749 INFO L276 IsEmpty]: Start isEmpty. Operand 7042 states and 31548 transitions. [2021-10-08 17:40:57,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 17:40:57,750 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:40:57,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:40:57,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-08 17:40:57,950 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 17:40:57,951 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:40:57,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:40:57,952 INFO L82 PathProgramCache]: Analyzing trace with hash -760980084, now seen corresponding path program 1 times [2021-10-08 17:40:57,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:40:57,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716502238] [2021-10-08 17:40:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:40:57,954 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:40:57,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:40:57,955 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 17:40:57,957 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 17:40:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:40:58,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:40:58,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:40:58,257 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 17:40:58,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:40:58,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-08 17:40:58,736 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 17:40:58,736 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:40:58,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716502238] [2021-10-08 17:40:58,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716502238] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:40:58,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:40:58,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 17:40:58,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115470872] [2021-10-08 17:40:58,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:40:58,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:40:58,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:40:58,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:40:58,738 INFO L87 Difference]: Start difference. First operand 7042 states and 31548 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:40:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:40:59,614 INFO L93 Difference]: Finished difference Result 20659 states and 93113 transitions. [2021-10-08 17:40:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 17:40:59,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-08 17:40:59,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:40:59,698 INFO L225 Difference]: With dead ends: 20659 [2021-10-08 17:40:59,698 INFO L226 Difference]: Without dead ends: 20659 [2021-10-08 17:40:59,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:40:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20659 states. [2021-10-08 17:41:00,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20659 to 8686. [2021-10-08 17:41:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8686 states, 8677 states have (on average 4.690330759479083) internal successors, (40698), 8685 states have internal predecessors, (40698), 0 states have call successors, (0), 0 states 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 17:41:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8686 states to 8686 states and 40698 transitions. [2021-10-08 17:41:00,072 INFO L78 Accepts]: Start accepts. Automaton has 8686 states and 40698 transitions. Word has length 10 [2021-10-08 17:41:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:41:00,073 INFO L470 AbstractCegarLoop]: Abstraction has 8686 states and 40698 transitions. [2021-10-08 17:41:00,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:41:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 8686 states and 40698 transitions. [2021-10-08 17:41:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 17:41:00,073 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:41:00,074 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:41:00,085 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 17:41:00,281 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 17:41:00,282 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:41:00,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:41:00,283 INFO L82 PathProgramCache]: Analyzing trace with hash -768318849, now seen corresponding path program 1 times [2021-10-08 17:41:00,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:41:00,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844278346] [2021-10-08 17:41:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:41:00,284 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:41:00,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:41:00,285 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 17:41:00,289 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 17:41:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:41:00,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-08 17:41:00,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:41:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:41:00,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:41:00,669 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 17:41:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:41:00,766 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:41:00,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844278346] [2021-10-08 17:41:00,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844278346] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:41:00,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:41:00,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-10-08 17:41:00,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619715973] [2021-10-08 17:41:00,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:41:00,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:41:00,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:41:00,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:41:00,768 INFO L87 Difference]: Start difference. First operand 8686 states and 40698 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:41:01,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:41:01,478 INFO L93 Difference]: Finished difference Result 13502 states and 63725 transitions. [2021-10-08 17:41:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-08 17:41:01,479 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-08 17:41:01,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:41:01,532 INFO L225 Difference]: With dead ends: 13502 [2021-10-08 17:41:01,532 INFO L226 Difference]: Without dead ends: 13502 [2021-10-08 17:41:01,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-10-08 17:41:01,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13502 states. [2021-10-08 17:41:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13502 to 9640. [2021-10-08 17:41:01,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9640 states, 9631 states have (on average 4.879659433080677) internal successors, (46996), 9639 states have internal predecessors, (46996), 0 states have call successors, (0), 0 states 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 17:41:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9640 states to 9640 states and 46996 transitions. [2021-10-08 17:41:01,795 INFO L78 Accepts]: Start accepts. Automaton has 9640 states and 46996 transitions. Word has length 10 [2021-10-08 17:41:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:41:01,795 INFO L470 AbstractCegarLoop]: Abstraction has 9640 states and 46996 transitions. [2021-10-08 17:41:01,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:41:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 9640 states and 46996 transitions. [2021-10-08 17:41:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 17:41:01,796 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:41:01,796 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:41:01,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-08 17:41:01,996 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 17:41:01,996 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:41:01,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:41:01,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2115542622, now seen corresponding path program 1 times [2021-10-08 17:41:01,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:41:01,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221548583] [2021-10-08 17:41:01,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:41:01,999 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:41:01,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:41:02,001 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 17:41:02,003 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 17:41:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:41:02,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 17:41:02,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:41:02,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:41:02,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:41:02,527 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:41:02,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-08 17:41:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:41:02,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:41:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:41:03,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:41:03,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221548583] [2021-10-08 17:41:03,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221548583] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:41:03,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:41:03,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 17:41:03,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188534192] [2021-10-08 17:41:03,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:41:03,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:41:03,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:41:03,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:41:03,208 INFO L87 Difference]: Start difference. First operand 9640 states and 46996 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:41:04,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:41:04,611 INFO L93 Difference]: Finished difference Result 16952 states and 83562 transitions. [2021-10-08 17:41:04,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 17:41:04,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 17:41:04,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:41:04,713 INFO L225 Difference]: With dead ends: 16952 [2021-10-08 17:41:04,714 INFO L226 Difference]: Without dead ends: 16952 [2021-10-08 17:41:04,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 742.5ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-08 17:41:04,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16952 states. [2021-10-08 17:41:05,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16952 to 15118. [2021-10-08 17:41:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15118 states, 15109 states have (on average 5.07604738897346) internal successors, (76694), 15117 states have internal predecessors, (76694), 0 states have call successors, (0), 0 states 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 17:41:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15118 states to 15118 states and 76694 transitions. [2021-10-08 17:41:05,111 INFO L78 Accepts]: Start accepts. Automaton has 15118 states and 76694 transitions. Word has length 11 [2021-10-08 17:41:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:41:05,111 INFO L470 AbstractCegarLoop]: Abstraction has 15118 states and 76694 transitions. [2021-10-08 17:41:05,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:41:05,112 INFO L276 IsEmpty]: Start isEmpty. Operand 15118 states and 76694 transitions. [2021-10-08 17:41:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 17:41:05,113 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:41:05,113 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:41:05,129 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 17:41:05,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:41:05,326 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:41:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:41:05,326 INFO L82 PathProgramCache]: Analyzing trace with hash 380046261, now seen corresponding path program 1 times [2021-10-08 17:41:05,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:41:05,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177656052] [2021-10-08 17:41:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:41:05,328 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:41:05,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:41:05,330 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:41:05,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-08 17:41:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:41:05,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 17:41:05,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:41:05,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:41:05,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:41:05,872 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:41:05,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-08 17:41:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:41:06,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:41:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:41:06,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:41:06,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177656052] [2021-10-08 17:41:06,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177656052] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:41:06,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:41:06,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 17:41:06,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843725205] [2021-10-08 17:41:06,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:41:06,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:41:06,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:41:06,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:41:06,646 INFO L87 Difference]: Start difference. First operand 15118 states and 76694 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:41:08,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:41:08,309 INFO L93 Difference]: Finished difference Result 34674 states and 176322 transitions. [2021-10-08 17:41:08,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 17:41:08,310 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 17:41:08,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:41:08,480 INFO L225 Difference]: With dead ends: 34674 [2021-10-08 17:41:08,480 INFO L226 Difference]: Without dead ends: 34674 [2021-10-08 17:41:08,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 828.5ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-08 17:41:08,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34674 states. [2021-10-08 17:41:09,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34674 to 33118. [2021-10-08 17:41:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33118 states, 33109 states have (on average 5.148871907940439) internal successors, (170474), 33117 states have internal predecessors, (170474), 0 states have call successors, (0), 0 states 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 17:41:09,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33118 states to 33118 states and 170474 transitions. [2021-10-08 17:41:09,404 INFO L78 Accepts]: Start accepts. Automaton has 33118 states and 170474 transitions. Word has length 12 [2021-10-08 17:41:09,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:41:09,405 INFO L470 AbstractCegarLoop]: Abstraction has 33118 states and 170474 transitions. [2021-10-08 17:41:09,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:41:09,405 INFO L276 IsEmpty]: Start isEmpty. Operand 33118 states and 170474 transitions. [2021-10-08 17:41:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-08 17:41:09,407 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:41:09,407 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:41:09,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-08 17:41:09,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:41:09,608 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:41:09,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:41:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash 223326988, now seen corresponding path program 2 times [2021-10-08 17:41:09,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:41:09,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203233509] [2021-10-08 17:41:09,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:41:09,610 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:41:09,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:41:09,611 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:41:09,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-08 17:41:09,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:41:09,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:41:09,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-08 17:41:09,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:41:09,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:41:09,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:41:10,260 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:41:10,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-08 17:41:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:41:10,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:41:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:41:11,904 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:41:11,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203233509] [2021-10-08 17:41:11,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203233509] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:41:11,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:41:11,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-08 17:41:11,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124642310] [2021-10-08 17:41:11,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-08 17:41:11,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:41:11,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-08 17:41:11,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-08 17:41:11,906 INFO L87 Difference]: Start difference. First operand 33118 states and 170474 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:41:22,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:41:22,480 INFO L93 Difference]: Finished difference Result 103362 states and 502674 transitions. [2021-10-08 17:41:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-08 17:41:22,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-08 17:41:22,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:41:24,257 INFO L225 Difference]: With dead ends: 103362 [2021-10-08 17:41:24,257 INFO L226 Difference]: Without dead ends: 103362 [2021-10-08 17:41:24,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3067.1ms TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-10-08 17:41:24,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103362 states. [2021-10-08 17:41:27,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103362 to 59204. [2021-10-08 17:41:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59204 states, 59195 states have (on average 5.032958864768984) internal successors, (297926), 59203 states have internal predecessors, (297926), 0 states have call successors, (0), 0 states 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 17:41:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59204 states to 59204 states and 297926 transitions. [2021-10-08 17:41:28,399 INFO L78 Accepts]: Start accepts. Automaton has 59204 states and 297926 transitions. Word has length 14 [2021-10-08 17:41:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:41:28,399 INFO L470 AbstractCegarLoop]: Abstraction has 59204 states and 297926 transitions. [2021-10-08 17:41:28,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:41:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 59204 states and 297926 transitions. [2021-10-08 17:41:28,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:41:28,406 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:41:28,406 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-08 17:41:28,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-08 17:41:28,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:41:28,607 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:41:28,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:41:28,608 INFO L82 PathProgramCache]: Analyzing trace with hash 646374593, now seen corresponding path program 3 times [2021-10-08 17:41:28,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:41:28,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115541313] [2021-10-08 17:41:28,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:41:28,610 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:41:28,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:41:28,611 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:41:28,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-08 17:41:29,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-08 17:41:29,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:41:29,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-08 17:41:29,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:41:29,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:41:29,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:41:29,762 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:41:29,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-08 17:41:30,537 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 17:41:30,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:41:35,709 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 17:41:35,709 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:41:35,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115541313] [2021-10-08 17:41:35,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115541313] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:41:35,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:41:35,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-08 17:41:35,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957111791] [2021-10-08 17:41:35,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-08 17:41:35,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:41:35,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-08 17:41:35,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-08 17:41:35,712 INFO L87 Difference]: Start difference. First operand 59204 states and 297926 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 17:41:47,100 WARN L207 SmtUtils]: Spent 7.49 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-08 17:41:59,858 WARN L207 SmtUtils]: Spent 5.99 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-08 17:42:56,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:42:56,144 INFO L93 Difference]: Finished difference Result 951942 states and 4896218 transitions. [2021-10-08 17:42:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-08 17:42:56,146 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 17:42:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:43:19,515 INFO L225 Difference]: With dead ends: 951942 [2021-10-08 17:43:19,516 INFO L226 Difference]: Without dead ends: 951942 [2021-10-08 17:43:19,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 46041.7ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-08 17:43:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951942 states. [2021-10-08 17:44:00,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951942 to 59220. [2021-10-08 17:44:00,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59220 states, 59211 states have (on average 5.032139298441168) internal successors, (297958), 59219 states have internal predecessors, (297958), 0 states have call successors, (0), 0 states 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 17:44:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59220 states to 59220 states and 297958 transitions. [2021-10-08 17:44:01,942 INFO L78 Accepts]: Start accepts. Automaton has 59220 states and 297958 transitions. Word has length 16 [2021-10-08 17:44:01,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:44:01,942 INFO L470 AbstractCegarLoop]: Abstraction has 59220 states and 297958 transitions. [2021-10-08 17:44:01,943 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 17:44:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 59220 states and 297958 transitions. [2021-10-08 17:44:01,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:44:01,951 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:44:01,951 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:44:01,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-08 17:44:02,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:44:02,166 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:44:02,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:44:02,167 INFO L82 PathProgramCache]: Analyzing trace with hash -209986524, now seen corresponding path program 3 times [2021-10-08 17:44:02,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:44:02,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3879870] [2021-10-08 17:44:02,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:44:02,169 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:44:02,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:44:02,170 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:44:02,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-08 17:44:02,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-08 17:44:02,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:44:02,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-08 17:44:02,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:44:02,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:44:02,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:44:03,029 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:44:03,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-08 17:44:03,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-08 17:44:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 17:44:03,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:44:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 17:44:03,809 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:44:03,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3879870] [2021-10-08 17:44:03,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3879870] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:44:03,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:44:03,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-08 17:44:03,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776247560] [2021-10-08 17:44:03,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 17:44:03,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:44:03,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 17:44:03,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:44:03,811 INFO L87 Difference]: Start difference. First operand 59220 states and 297958 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:44:08,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:44:08,384 INFO L93 Difference]: Finished difference Result 84309 states and 409691 transitions. [2021-10-08 17:44:08,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-08 17:44:08,385 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-08 17:44:08,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:44:09,782 INFO L225 Difference]: With dead ends: 84309 [2021-10-08 17:44:09,782 INFO L226 Difference]: Without dead ends: 84309 [2021-10-08 17:44:09,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 861.5ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-10-08 17:44:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84309 states. [2021-10-08 17:44:12,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84309 to 68253. [2021-10-08 17:44:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68253 states, 68244 states have (on average 4.987149053396635) internal successors, (340343), 68252 states have internal predecessors, (340343), 0 states have call successors, (0), 0 states 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 17:44:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68253 states to 68253 states and 340343 transitions. [2021-10-08 17:44:13,757 INFO L78 Accepts]: Start accepts. Automaton has 68253 states and 340343 transitions. Word has length 16 [2021-10-08 17:44:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:44:13,757 INFO L470 AbstractCegarLoop]: Abstraction has 68253 states and 340343 transitions. [2021-10-08 17:44:13,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:44:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 68253 states and 340343 transitions. [2021-10-08 17:44:13,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:44:13,779 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:44:13,780 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:44:13,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-08 17:44:13,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:44:13,996 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:44:13,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:44:13,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1525111735, now seen corresponding path program 2 times [2021-10-08 17:44:13,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:44:13,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879908918] [2021-10-08 17:44:13,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:44:13,999 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:44:13,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:44:14,000 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:44:14,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-08 17:44:14,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:44:14,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:44:14,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-08 17:44:14,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:44:14,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:44:14,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:44:14,668 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:44:14,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-08 17:44:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:44:15,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:44:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:44:16,632 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:44:16,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879908918] [2021-10-08 17:44:16,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879908918] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:44:16,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:44:16,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2021-10-08 17:44:16,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888652208] [2021-10-08 17:44:16,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-08 17:44:16,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:44:16,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-08 17:44:16,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-10-08 17:44:16,634 INFO L87 Difference]: Start difference. First operand 68253 states and 340343 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:44:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:44:37,660 INFO L93 Difference]: Finished difference Result 120857 states and 591859 transitions. [2021-10-08 17:44:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-08 17:44:37,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:44:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:44:38,686 INFO L225 Difference]: With dead ends: 120857 [2021-10-08 17:44:38,686 INFO L226 Difference]: Without dead ends: 120857 [2021-10-08 17:44:38,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5781.3ms TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-10-08 17:44:38,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120857 states. [2021-10-08 17:44:42,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120857 to 83335. [2021-10-08 17:44:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83335 states, 83326 states have (on average 4.997251758154718) internal successors, (416401), 83334 states have internal predecessors, (416401), 0 states have call successors, (0), 0 states 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 17:44:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83335 states to 83335 states and 416401 transitions. [2021-10-08 17:44:44,311 INFO L78 Accepts]: Start accepts. Automaton has 83335 states and 416401 transitions. Word has length 16 [2021-10-08 17:44:44,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:44:44,312 INFO L470 AbstractCegarLoop]: Abstraction has 83335 states and 416401 transitions. [2021-10-08 17:44:44,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:44:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 83335 states and 416401 transitions. [2021-10-08 17:44:44,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-08 17:44:44,358 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:44:44,358 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:44:44,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-08 17:44:44,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:44:44,559 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:44:44,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:44:44,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1306102538, now seen corresponding path program 4 times [2021-10-08 17:44:44,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:44:44,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132134916] [2021-10-08 17:44:44,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 17:44:44,562 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:44:44,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:44:44,563 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:44:44,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-08 17:44:44,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 17:44:44,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:44:44,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 17:44:44,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:44:44,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:44:44,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:44:45,282 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:44:45,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-08 17:44:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 17:44:45,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:44:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 17:44:47,108 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:44:47,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132134916] [2021-10-08 17:44:47,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132134916] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:44:47,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:44:47,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 17:44:47,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254574774] [2021-10-08 17:44:47,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 17:44:47,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:44:47,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 17:44:47,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:44:47,110 INFO L87 Difference]: Start difference. First operand 83335 states and 416401 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:44:59,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:44:59,455 INFO L93 Difference]: Finished difference Result 162963 states and 803445 transitions. [2021-10-08 17:44:59,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-08 17:44:59,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-08 17:44:59,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:45:01,523 INFO L225 Difference]: With dead ends: 162963 [2021-10-08 17:45:01,523 INFO L226 Difference]: Without dead ends: 162963 [2021-10-08 17:45:01,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 7181.8ms TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2021-10-08 17:45:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162963 states. [2021-10-08 17:45:07,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162963 to 103689. [2021-10-08 17:45:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103689 states, 103680 states have (on average 5.241059027777778) internal successors, (543393), 103688 states have internal predecessors, (543393), 0 states have call successors, (0), 0 states 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 17:45:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103689 states to 103689 states and 543393 transitions. [2021-10-08 17:45:08,806 INFO L78 Accepts]: Start accepts. Automaton has 103689 states and 543393 transitions. Word has length 17 [2021-10-08 17:45:08,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:45:08,806 INFO L470 AbstractCegarLoop]: Abstraction has 103689 states and 543393 transitions. [2021-10-08 17:45:08,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:45:08,807 INFO L276 IsEmpty]: Start isEmpty. Operand 103689 states and 543393 transitions. [2021-10-08 17:45:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-08 17:45:08,827 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:45:08,827 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:45:08,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-08 17:45:09,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:45:09,037 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:45:09,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:45:09,038 INFO L82 PathProgramCache]: Analyzing trace with hash -509360553, now seen corresponding path program 2 times [2021-10-08 17:45:09,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:45:09,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281533762] [2021-10-08 17:45:09,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:45:09,040 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:45:09,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:45:09,041 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:45:09,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-08 17:45:09,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:45:09,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:45:09,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-08 17:45:09,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:45:09,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:45:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:45:09,805 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:45:09,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-08 17:45:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:45:10,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:45:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:45:12,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:45:12,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281533762] [2021-10-08 17:45:12,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281533762] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:45:12,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:45:12,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-08 17:45:12,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676330332] [2021-10-08 17:45:12,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-08 17:45:12,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:45:12,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-08 17:45:12,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-08 17:45:12,185 INFO L87 Difference]: Start difference. First operand 103689 states and 543393 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 17:45:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:45:37,381 INFO L93 Difference]: Finished difference Result 179465 states and 945967 transitions. [2021-10-08 17:45:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-08 17:45:37,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 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 17:45:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:45:39,946 INFO L225 Difference]: With dead ends: 179465 [2021-10-08 17:45:39,946 INFO L226 Difference]: Without dead ends: 179465 [2021-10-08 17:45:39,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 4800.0ms TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2021-10-08 17:45:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179465 states. [2021-10-08 17:45:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179465 to 129589. [2021-10-08 17:45:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129589 states, 129580 states have (on average 5.323691927766631) internal successors, (689844), 129588 states have internal predecessors, (689844), 0 states have call successors, (0), 0 states 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 17:45:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129589 states to 129589 states and 689844 transitions. [2021-10-08 17:45:50,896 INFO L78 Accepts]: Start accepts. Automaton has 129589 states and 689844 transitions. Word has length 18 [2021-10-08 17:45:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:45:50,898 INFO L470 AbstractCegarLoop]: Abstraction has 129589 states and 689844 transitions. [2021-10-08 17:45:50,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 17:45:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 129589 states and 689844 transitions. [2021-10-08 17:45:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:45:50,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:45:50,920 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:45:50,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-08 17:45:51,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:45:51,138 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:45:51,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:45:51,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1604637643, now seen corresponding path program 3 times [2021-10-08 17:45:51,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:45:51,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455735728] [2021-10-08 17:45:51,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:45:51,139 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:45:51,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:45:51,144 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:45:51,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-08 17:45:51,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-08 17:45:51,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:45:51,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 17:45:51,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:45:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-08 17:45:51,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:45:51,991 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-08 17:45:51,992 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 60 treesize of output 1 [2021-10-08 17:45:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-08 17:45:52,002 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:45:52,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455735728] [2021-10-08 17:45:52,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455735728] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:45:52,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:45:52,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-10-08 17:45:52,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086530719] [2021-10-08 17:45:52,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:45:52,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:45:52,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:45:52,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:45:52,016 INFO L87 Difference]: Start difference. First operand 129589 states and 689844 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 17:45:57,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:45:57,576 INFO L93 Difference]: Finished difference Result 161435 states and 848442 transitions. [2021-10-08 17:45:57,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-08 17:45:57,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-10-08 17:45:57,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:46:00,434 INFO L225 Difference]: With dead ends: 161435 [2021-10-08 17:46:00,434 INFO L226 Difference]: Without dead ends: 161435 [2021-10-08 17:46:00,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-08 17:46:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161435 states. [2021-10-08 17:46:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161435 to 148695. [2021-10-08 17:46:07,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148695 states, 148686 states have (on average 5.279569024655986) internal successors, (784998), 148694 states have internal predecessors, (784998), 0 states have call successors, (0), 0 states 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 17:46:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148695 states to 148695 states and 784998 transitions. [2021-10-08 17:46:09,849 INFO L78 Accepts]: Start accepts. Automaton has 148695 states and 784998 transitions. Word has length 19 [2021-10-08 17:46:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:46:09,849 INFO L470 AbstractCegarLoop]: Abstraction has 148695 states and 784998 transitions. [2021-10-08 17:46:09,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 17:46:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 148695 states and 784998 transitions. [2021-10-08 17:46:09,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-08 17:46:09,886 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:46:09,886 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:46:09,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-08 17:46:10,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:46:10,097 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:46:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:46:10,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1121911478, now seen corresponding path program 1 times [2021-10-08 17:46:10,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:46:10,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15514480] [2021-10-08 17:46:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:46:10,100 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:46:10,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:46:10,101 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:46:10,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-08 17:46:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:46:10,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 17:46:10,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:46:10,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:46:10,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:46:10,810 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:46:10,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-08 17:46:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 17:46:11,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:46:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 17:46:13,325 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:46:13,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15514480] [2021-10-08 17:46:13,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15514480] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:46:13,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:46:13,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-08 17:46:13,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331915904] [2021-10-08 17:46:13,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-08 17:46:13,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:46:13,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-08 17:46:13,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-08 17:46:13,328 INFO L87 Difference]: Start difference. First operand 148695 states and 784998 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 17:46:32,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:46:32,641 INFO L93 Difference]: Finished difference Result 326833 states and 1695508 transitions. [2021-10-08 17:46:32,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-08 17:46:32,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 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 20 [2021-10-08 17:46:32,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:46:40,258 INFO L225 Difference]: With dead ends: 326833 [2021-10-08 17:46:40,259 INFO L226 Difference]: Without dead ends: 326833 [2021-10-08 17:46:40,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 7579.2ms TimeCoverageRelationStatistics Valid=289, Invalid=641, Unknown=0, NotChecked=0, Total=930 [2021-10-08 17:46:42,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326833 states. [2021-10-08 17:46:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326833 to 237647. [2021-10-08 17:46:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237647 states, 237638 states have (on average 5.372238446713068) internal successors, (1276648), 237646 states have internal predecessors, (1276648), 0 states have call successors, (0), 0 states 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 17:47:01,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237647 states to 237647 states and 1276648 transitions. [2021-10-08 17:47:01,321 INFO L78 Accepts]: Start accepts. Automaton has 237647 states and 1276648 transitions. Word has length 20 [2021-10-08 17:47:01,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:01,322 INFO L470 AbstractCegarLoop]: Abstraction has 237647 states and 1276648 transitions. [2021-10-08 17:47:01,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 17:47:01,322 INFO L276 IsEmpty]: Start isEmpty. Operand 237647 states and 1276648 transitions. [2021-10-08 17:47:01,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-08 17:47:01,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:01,373 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:47:01,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-08 17:47:01,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:47:01,588 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:47:01,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:01,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1989999960, now seen corresponding path program 1 times [2021-10-08 17:47:01,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:01,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665435535] [2021-10-08 17:47:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:47:01,589 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:01,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:01,590 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:47:01,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-08 17:47:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:47:01,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-08 17:47:01,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:01,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:47:01,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:47:02,292 INFO L354 Elim1Store]: treesize reduction 345, result has 19.2 percent of original size [2021-10-08 17:47:02,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 89 [2021-10-08 17:47:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:02,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:04,837 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:04,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665435535] [2021-10-08 17:47:04,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665435535] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:47:04,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:47:04,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2021-10-08 17:47:04,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885019069] [2021-10-08 17:47:04,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-08 17:47:04,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:04,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-08 17:47:04,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-10-08 17:47:04,840 INFO L87 Difference]: Start difference. First operand 237647 states and 1276648 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 17:47:34,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:34,425 INFO L93 Difference]: Finished difference Result 357309 states and 1905543 transitions. [2021-10-08 17:47:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-08 17:47:34,428 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 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 20 [2021-10-08 17:47:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:43,082 INFO L225 Difference]: With dead ends: 357309 [2021-10-08 17:47:43,082 INFO L226 Difference]: Without dead ends: 357309 [2021-10-08 17:47:43,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 6768.9ms TimeCoverageRelationStatistics Valid=292, Invalid=1114, Unknown=0, NotChecked=0, Total=1406 [2021-10-08 17:47:45,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357309 states. [2021-10-08 17:48:01,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357309 to 200985. [2021-10-08 17:48:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200985 states, 200976 states have (on average 5.324257622800732) internal successors, (1070048), 200984 states have internal predecessors, (1070048), 0 states have call successors, (0), 0 states 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 17:48:05,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200985 states to 200985 states and 1070048 transitions. [2021-10-08 17:48:05,806 INFO L78 Accepts]: Start accepts. Automaton has 200985 states and 1070048 transitions. Word has length 20 [2021-10-08 17:48:05,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:48:05,807 INFO L470 AbstractCegarLoop]: Abstraction has 200985 states and 1070048 transitions. [2021-10-08 17:48:05,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 17:48:05,807 INFO L276 IsEmpty]: Start isEmpty. Operand 200985 states and 1070048 transitions. [2021-10-08 17:48:05,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:48:05,867 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:48:05,867 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:48:05,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-08 17:48:06,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:48:06,074 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:48:06,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:48:06,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1721405611, now seen corresponding path program 3 times [2021-10-08 17:48:06,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:48:06,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475561155] [2021-10-08 17:48:06,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:48:06,076 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:48:06,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:48:06,077 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:48:06,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-08 17:48:06,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-08 17:48:06,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:48:06,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 17:48:06,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:48:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-08 17:48:06,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:48:06,798 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-08 17:48:06,799 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 60 treesize of output 1 [2021-10-08 17:48:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-08 17:48:06,812 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:48:06,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475561155] [2021-10-08 17:48:06,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475561155] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:48:06,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:48:06,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-10-08 17:48:06,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999673165] [2021-10-08 17:48:06,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:48:06,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:48:06,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:48:06,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:48:06,816 INFO L87 Difference]: Start difference. First operand 200985 states and 1070048 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 17:48:18,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:48:18,445 INFO L93 Difference]: Finished difference Result 324228 states and 1691418 transitions. [2021-10-08 17:48:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 17:48:18,450 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 21 [2021-10-08 17:48:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:48:25,907 INFO L225 Difference]: With dead ends: 324228 [2021-10-08 17:48:25,908 INFO L226 Difference]: Without dead ends: 324228 [2021-10-08 17:48:25,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 297.0ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-10-08 17:48:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324228 states. [2021-10-08 17:48:40,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324228 to 241978. [2021-10-08 17:48:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241978 states, 241969 states have (on average 5.266124999483405) internal successors, (1274239), 241977 states have internal predecessors, (1274239), 0 states have call successors, (0), 0 states 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 17:48:45,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241978 states to 241978 states and 1274239 transitions. [2021-10-08 17:48:45,533 INFO L78 Accepts]: Start accepts. Automaton has 241978 states and 1274239 transitions. Word has length 21 [2021-10-08 17:48:45,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:48:45,533 INFO L470 AbstractCegarLoop]: Abstraction has 241978 states and 1274239 transitions. [2021-10-08 17:48:45,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 17:48:45,534 INFO L276 IsEmpty]: Start isEmpty. Operand 241978 states and 1274239 transitions. [2021-10-08 17:48:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-08 17:48:45,628 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:48:45,628 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:48:45,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-08 17:48:45,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:48:45,837 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 56 more)] === [2021-10-08 17:48:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:48:45,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1130327069, now seen corresponding path program 1 times [2021-10-08 17:48:45,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:48:45,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118051880] [2021-10-08 17:48:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:48:45,839 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:48:45,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:48:45,840 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:48:45,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-08 17:48:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:48:46,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 17:48:46,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:48:46,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:48:46,273 INFO L190 IndexEqualityManager]: detected not equals via solver Received shutdown request... [2021-10-08 17:48:46,442 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-08 17:48:46,443 WARN L223 SmtUtils]: Removed 22 from assertion stack [2021-10-08 17:48:46,444 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-08 17:48:46,454 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-08 17:48:46,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-10-08 17:48:46,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:48:46,645 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. [2021-10-08 17:48:46,647 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-08 17:48:46,647 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-08 17:48:46,647 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-08 17:48:46,647 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-08 17:48:46,648 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4REQUIRES_VIOLATION [2021-10-08 17:48:46,648 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5REQUIRES_VIOLATION [2021-10-08 17:48:46,648 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-08 17:48:46,648 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-08 17:48:46,648 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-08 17:48:46,648 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-08 17:48:46,648 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err4REQUIRES_VIOLATION [2021-10-08 17:48:46,648 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err5REQUIRES_VIOLATION [2021-10-08 17:48:46,649 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-08 17:48:46,649 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-08 17:48:46,649 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-08 17:48:46,649 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-08 17:48:46,649 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err4REQUIRES_VIOLATION [2021-10-08 17:48:46,649 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err5REQUIRES_VIOLATION [2021-10-08 17:48:46,649 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-08 17:48:46,650 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-08 17:48:46,650 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-08 17:48:46,650 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-08 17:48:46,650 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-08 17:48:46,650 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-08 17:48:46,650 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-08 17:48:46,650 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-08 17:48:46,651 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-08 17:48:46,651 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-08 17:48:46,651 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-08 17:48:46,651 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-08 17:48:46,651 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-08 17:48:46,651 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-08 17:48:46,651 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-08 17:48:46,651 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-08 17:48:46,652 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-08 17:48:46,652 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-08 17:48:46,652 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 17:48:46,652 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 17:48:46,652 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 17:48:46,652 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 17:48:46,652 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-08 17:48:46,653 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-08 17:48:46,653 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-08 17:48:46,653 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-08 17:48:46,653 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-08 17:48:46,653 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-08 17:48:46,653 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4REQUIRES_VIOLATION [2021-10-08 17:48:46,653 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5REQUIRES_VIOLATION [2021-10-08 17:48:46,654 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-08 17:48:46,654 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-08 17:48:46,654 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-08 17:48:46,654 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err4REQUIRES_VIOLATION [2021-10-08 17:48:46,654 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err5REQUIRES_VIOLATION [2021-10-08 17:48:46,654 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-08 17:48:46,654 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-08 17:48:46,654 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-08 17:48:46,655 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-08 17:48:46,655 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err4REQUIRES_VIOLATION [2021-10-08 17:48:46,655 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err5REQUIRES_VIOLATION [2021-10-08 17:48:46,662 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 17:48:46,663 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 17:48:46,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.10 05:48:46 BasicIcfg [2021-10-08 17:48:46,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-08 17:48:46,666 INFO L168 Benchmark]: Toolchain (without parser) took 601530.19 ms. Allocated memory was 163.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 138.0 MB in the beginning and 4.3 GB in the end (delta: -4.2 GB). Peak memory consumption was 3.7 GB. Max. memory is 8.0 GB. [2021-10-08 17:48:46,667 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 163.6 MB. Free memory was 133.5 MB in the beginning and 133.1 MB in the end (delta: 435.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-08 17:48:46,667 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.67 ms. Allocated memory is still 163.6 MB. Free memory was 137.6 MB in the beginning and 124.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-08 17:48:46,667 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.36 ms. Allocated memory is still 163.6 MB. Free memory was 123.9 MB in the beginning and 122.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 17:48:46,668 INFO L168 Benchmark]: Boogie Preprocessor took 39.79 ms. Allocated memory is still 163.6 MB. Free memory was 122.1 MB in the beginning and 120.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 17:48:46,668 INFO L168 Benchmark]: RCFGBuilder took 1302.30 ms. Allocated memory is still 163.6 MB. Free memory was 120.2 MB in the beginning and 127.8 MB in the end (delta: -7.6 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. [2021-10-08 17:48:46,669 INFO L168 Benchmark]: TraceAbstraction took 599740.46 ms. Allocated memory was 163.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 127.3 MB in the beginning and 4.3 GB in the end (delta: -4.2 GB). Peak memory consumption was 3.7 GB. Max. memory is 8.0 GB. [2021-10-08 17:48:46,671 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 163.6 MB. Free memory was 133.5 MB in the beginning and 133.1 MB in the end (delta: 435.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 379.67 ms. Allocated memory is still 163.6 MB. Free memory was 137.6 MB in the beginning and 124.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 50.36 ms. Allocated memory is still 163.6 MB. Free memory was 123.9 MB in the beginning and 122.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.79 ms. Allocated memory is still 163.6 MB. Free memory was 122.1 MB in the beginning and 120.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1302.30 ms. Allocated memory is still 163.6 MB. Free memory was 120.2 MB in the beginning and 127.8 MB in the end (delta: -7.6 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 599740.46 ms. Allocated memory was 163.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 127.3 MB in the beginning and 4.3 GB in the end (delta: -4.2 GB). Peak memory consumption was 3.7 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 30325.0ms, 222 PlacesBefore, 91 PlacesAfterwards, 224 TransitionsBefore, 85 TransitionsAfterwards, 9156 CoEnabledTransitionPairs, 7 FixpointIterations, 88 TrivialSequentialCompositions, 93 ConcurrentSequentialCompositions, 17 TrivialYvCompositions, 20 ConcurrentYvCompositions, 8 ChoiceCompositions, 226 TotalNumberOfCompositions, 19352 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12216, positive: 11985, positive conditional: 0, positive unconditional: 11985, negative: 231, negative conditional: 0, negative unconditional: 231, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 5968, positive: 5877, positive conditional: 0, positive unconditional: 5877, negative: 91, negative conditional: 0, negative unconditional: 91, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 5968, positive: 5877, positive conditional: 0, positive unconditional: 5877, negative: 91, negative conditional: 0, negative unconditional: 91, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 91, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 91, negative conditional: 0, negative unconditional: 91, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 4185, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 4185, negative conditional: 0, negative unconditional: 4185, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 12216, positive: 6108, positive conditional: 0, positive unconditional: 6108, negative: 140, negative conditional: 0, negative unconditional: 140, unknown: 5968, unknown conditional: 0, unknown unconditional: 5968] , Statistics on independence cache: Total cache size (in pairs): 865, Positive cache size: 836, Positive conditional cache size: 0, Positive unconditional cache size: 836, Negative cache size: 29, Negative conditional cache size: 0, Negative unconditional cache size: 29 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 104 for 165ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 292 locations, 60 error locations. Started 1 CEGAR loops. OverallTime: 599545.1ms, OverallIterations: 33, TraceHistogramMax: 14, EmptinessCheckTime: 463.0ms, AutomataDifference: 307522.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 32082.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2043 SDtfs, 26362 SDslu, 13143 SDs, 0 SdLazy, 16067 SolverSat, 705 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 97817.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 735 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 412 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 92791.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=241978occurred in iteration=32, InterpolantAutomatonStates: 294, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 159079.1ms AutomataMinimizationTime, 32 MinimizatonAttempts, 1551524 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 301.6ms SsaConstructionTime, 2521.4ms SatisfiabilityAnalysisTime, 85595.3ms InterpolantComputationTime, 320 NumberOfCodeBlocks, 300 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 576 ConstructedInterpolants, 72 QuantifiedInterpolants, 11993 SizeOfPredicates, 322 NumberOfNonLiveVariables, 2766 ConjunctsInSsa, 392 ConjunctsInUnsatCore, 64 InterpolantComputations, 32 PerfectInterpolantSequences, 231/664 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown