/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-simple-array-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 16:39:37,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 16:39:37,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 16:39:37,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-07 16:39:37,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 16:39:37,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 16:39:37,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 16:39:37,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 16:39:37,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 16:39:37,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 16:39:37,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 16:39:37,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 16:39:37,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 16:39:37,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 16:39:37,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 16:39:37,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 16:39:37,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-07 16:39:37,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-07 16:39:37,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-07 16:39:37,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-07 16:39:37,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-07 16:39:37,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-07 16:39:37,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-07 16:39:37,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-07 16:39:37,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-07 16:39:37,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 16:39:37,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 16:39:37,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 16:39:37,508 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 16:39:37,538 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 16:39:37,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 16:39:37,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 16:39:37,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 16:39:37,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 16:39:37,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 16:39:37,541 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 16:39:37,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 16:39:37,542 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 16:39:37,542 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 16:39:37,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 16:39:37,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 16:39:37,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 16:39:37,543 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 16:39:37,543 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 16:39:37,543 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 16:39:37,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 16:39:37,544 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 16:39:37,544 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 16:39:37,544 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 16:39:37,544 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 16:39:37,545 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 16:39:37,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 16:39:37,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 16:39:37,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 16:39:37,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:39:37,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 16:39:37,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 16:39:37,546 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 16:39:37,546 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 16:39:37,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 16:39:37,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 16:39:37,547 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 16:39:37,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 16:39:38,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 16:39:38,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 16:39:38,045 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 16:39:38,046 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 16:39:38,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-10-07 16:39:38,120 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/992cec519/48fcbfcf1ba1421d94e7ccee9d01995f/FLAGd92031c7f [2021-10-07 16:39:38,710 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 16:39:38,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-10-07 16:39:38,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/992cec519/48fcbfcf1ba1421d94e7ccee9d01995f/FLAGd92031c7f [2021-10-07 16:39:39,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/992cec519/48fcbfcf1ba1421d94e7ccee9d01995f [2021-10-07 16:39:39,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 16:39:39,063 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 16:39:39,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 16:39:39,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 16:39:39,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 16:39:39,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:39:39" (1/1) ... [2021-10-07 16:39:39,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fde2856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:39, skipping insertion in model container [2021-10-07 16:39:39,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:39:39" (1/1) ... [2021-10-07 16:39:39,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 16:39:39,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:39:39,312 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2326,2339] [2021-10-07 16:39:39,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:39:39,340 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-07 16:39:39,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:39:39,362 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-simple-array-sum.wvr.c[2326,2339] [2021-10-07 16:39:39,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:39:39,375 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 16:39:39,404 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-simple-array-sum.wvr.c[2326,2339] [2021-10-07 16:39:39,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:39:39,436 INFO L208 MainTranslator]: Completed translation [2021-10-07 16:39:39,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:39 WrapperNode [2021-10-07 16:39:39,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 16:39:39,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 16:39:39,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 16:39:39,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 16:39:39,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:39" (1/1) ... [2021-10-07 16:39:39,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:39" (1/1) ... [2021-10-07 16:39:39,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 16:39:39,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 16:39:39,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 16:39:39,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 16:39:39,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:39" (1/1) ... [2021-10-07 16:39:39,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:39" (1/1) ... [2021-10-07 16:39:39,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:39" (1/1) ... [2021-10-07 16:39:39,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:39" (1/1) ... [2021-10-07 16:39:39,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:39" (1/1) ... [2021-10-07 16:39:39,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:39" (1/1) ... [2021-10-07 16:39:39,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:39" (1/1) ... [2021-10-07 16:39:39,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 16:39:39,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 16:39:39,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 16:39:39,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 16:39:39,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:39" (1/1) ... [2021-10-07 16:39:39,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:39:39,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 16:39:39,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-07 16:39:39,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-07 16:39:39,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 16:39:39,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 16:39:39,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 16:39:39,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 16:39:39,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 16:39:39,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 16:39:39,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 16:39:39,820 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 16:39:39,821 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 16:39:39,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 16:39:39,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 16:39:39,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 16:39:39,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 16:39:39,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 16:39:39,823 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 16:39:40,643 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 16:39:40,644 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-10-07 16:39:40,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:39:40 BoogieIcfgContainer [2021-10-07 16:39:40,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 16:39:40,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 16:39:40,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 16:39:40,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 16:39:40,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 04:39:39" (1/3) ... [2021-10-07 16:39:40,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9087a62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:39:40, skipping insertion in model container [2021-10-07 16:39:40,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:39:39" (2/3) ... [2021-10-07 16:39:40,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9087a62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:39:40, skipping insertion in model container [2021-10-07 16:39:40,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:39:40" (3/3) ... [2021-10-07 16:39:40,656 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2021-10-07 16:39:40,663 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 16:39:40,663 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-10-07 16:39:40,663 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 16:39:40,715 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,716 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,717 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,718 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,718 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,718 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,718 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,718 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,719 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,719 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,719 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,719 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,723 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,723 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,723 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,724 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,724 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,724 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,725 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,725 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,725 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,726 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,726 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,727 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,727 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,727 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,728 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,728 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,728 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,730 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,731 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,731 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,731 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,731 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,732 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,732 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,732 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,732 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,733 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,733 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,733 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,733 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,734 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,734 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,734 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,734 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,738 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,738 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,739 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,739 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,739 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,740 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,741 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,741 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,741 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,741 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,742 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,742 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,742 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,743 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,743 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,743 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,744 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,745 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,745 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,745 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,746 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,747 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,747 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,747 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,747 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,748 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,748 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,749 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,749 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,749 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,749 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,749 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,750 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,750 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,751 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,751 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,751 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,751 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,752 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,752 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,752 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,753 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,754 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,755 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,756 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,757 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,761 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,766 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,767 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,767 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,768 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,768 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,768 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,768 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,772 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,773 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,774 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,775 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,775 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,783 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,783 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,783 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,784 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,784 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,788 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,788 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,788 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,788 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,789 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:39:40,798 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-07 16:39:40,879 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 16:39:40,901 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-07 16:39:40,902 INFO L340 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2021-10-07 16:39:40,929 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 16:39:40,943 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 198 transitions, 420 flow [2021-10-07 16:39:40,947 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 198 transitions, 420 flow [2021-10-07 16:39:40,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 192 places, 198 transitions, 420 flow [2021-10-07 16:39:41,032 INFO L129 PetriNetUnfolder]: 16/195 cut-off events. [2021-10-07 16:39:41,032 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-07 16:39:41,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 195 events. 16/195 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 244 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 145. Up to 3 conditions per place. [2021-10-07 16:39:41,045 INFO L116 LiptonReduction]: Number of co-enabled transitions 3148 [2021-10-07 16:40:06,948 INFO L131 LiptonReduction]: Checked pairs total: 5047 [2021-10-07 16:40:06,948 INFO L133 LiptonReduction]: Total number of compositions: 202 [2021-10-07 16:40:06,958 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 59 transitions, 142 flow [2021-10-07 16:40:07,063 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1533 states, 1319 states have (on average 4.216072782410917) internal successors, (5561), 1532 states have internal predecessors, (5561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 1533 states, 1319 states have (on average 4.216072782410917) internal successors, (5561), 1532 states have internal predecessors, (5561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:07,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:40:07,077 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:40:07,077 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:40:07,078 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:40:07,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:40:07,084 INFO L82 PathProgramCache]: Analyzing trace with hash 23782, now seen corresponding path program 1 times [2021-10-07 16:40:07,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:40:07,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268710342] [2021-10-07 16:40:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:40:07,100 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:40:07,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:40:07,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:40:07,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 16:40:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:40:07,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:40:07,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:40:07,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:40:07,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:40:07,717 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:40:07,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:40:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:07,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:40:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:07,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:40:07,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268710342] [2021-10-07 16:40:07,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268710342] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:40:07,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:40:07,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:40:07,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348285308] [2021-10-07 16:40:07,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:40:07,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:40:07,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:40:07,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:40:07,953 INFO L87 Difference]: Start difference. First operand has 1533 states, 1319 states have (on average 4.216072782410917) internal successors, (5561), 1532 states have internal predecessors, (5561), 0 states have call successors, (0), 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) [2021-10-07 16:40:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:40:08,825 INFO L93 Difference]: Finished difference Result 3065 states and 11125 transitions. [2021-10-07 16:40:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:40:08,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:40:08,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:40:08,892 INFO L225 Difference]: With dead ends: 3065 [2021-10-07 16:40:08,893 INFO L226 Difference]: Without dead ends: 3065 [2021-10-07 16:40:08,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:40:08,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2021-10-07 16:40:09,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 1536. [2021-10-07 16:40:09,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1323 states have (on average 4.214663643235072) internal successors, (5576), 1535 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5576 transitions. [2021-10-07 16:40:09,080 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5576 transitions. Word has length 2 [2021-10-07 16:40:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:40:09,081 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 5576 transitions. [2021-10-07 16:40:09,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5576 transitions. [2021-10-07 16:40:09,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:40:09,082 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:40:09,082 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:40:09,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-07 16:40:09,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:40:09,284 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:40:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:40:09,285 INFO L82 PathProgramCache]: Analyzing trace with hash 23783, now seen corresponding path program 1 times [2021-10-07 16:40:09,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:40:09,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830664486] [2021-10-07 16:40:09,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:40:09,287 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:40:09,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:40:09,289 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:40:09,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 16:40:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:40:09,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:40:09,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:40:09,555 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:40:09,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:40:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:10,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:40:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:10,308 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:40:10,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830664486] [2021-10-07 16:40:10,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830664486] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:40:10,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:40:10,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:40:10,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468686289] [2021-10-07 16:40:10,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:40:10,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:40:10,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:40:10,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:40:10,313 INFO L87 Difference]: Start difference. First operand 1536 states and 5576 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) [2021-10-07 16:40:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:40:10,504 INFO L93 Difference]: Finished difference Result 1534 states and 5570 transitions. [2021-10-07 16:40:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:40:10,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:40:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:40:10,523 INFO L225 Difference]: With dead ends: 1534 [2021-10-07 16:40:10,523 INFO L226 Difference]: Without dead ends: 1534 [2021-10-07 16:40:10,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:40:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-10-07 16:40:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1534. [2021-10-07 16:40:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1323 states have (on average 4.210128495842781) internal successors, (5570), 1533 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5570 transitions. [2021-10-07 16:40:10,597 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5570 transitions. Word has length 2 [2021-10-07 16:40:10,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:40:10,597 INFO L470 AbstractCegarLoop]: Abstraction has 1534 states and 5570 transitions. [2021-10-07 16:40:10,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5570 transitions. [2021-10-07 16:40:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:40:10,598 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:40:10,598 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:40:10,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-07 16:40:10,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:40:10,810 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:40:10,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:40:10,812 INFO L82 PathProgramCache]: Analyzing trace with hash 742802, now seen corresponding path program 1 times [2021-10-07 16:40:10,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:40:10,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018724590] [2021-10-07 16:40:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:40:10,814 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:40:10,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:40:10,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:40:10,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 16:40:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:40:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 16:40:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:40:11,378 INFO L354 Elim1Store]: treesize reduction 245, result has 17.2 percent of original size [2021-10-07 16:40:11,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 71 treesize of output 105 [2021-10-07 16:40:11,398 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-07 16:40:11,399 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 249 treesize of output 243 [2021-10-07 16:40:15,138 INFO L354 Elim1Store]: treesize reduction 84, result has 36.8 percent of original size [2021-10-07 16:40:15,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 99 [2021-10-07 16:40:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:25,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:40:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:40:25,275 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:40:25,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018724590] [2021-10-07 16:40:25,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018724590] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:40:25,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:40:25,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-07 16:40:25,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084776070] [2021-10-07 16:40:25,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 16:40:25,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:40:25,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 16:40:25,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=17, Unknown=1, NotChecked=0, Total=30 [2021-10-07 16:40:25,279 INFO L87 Difference]: Start difference. First operand 1534 states and 5570 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) [2021-10-07 16:40:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:40:32,449 INFO L93 Difference]: Finished difference Result 1263 states and 4442 transitions. [2021-10-07 16:40:32,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:40:32,451 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 [2021-10-07 16:40:32,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:40:32,463 INFO L225 Difference]: With dead ends: 1263 [2021-10-07 16:40:32,464 INFO L226 Difference]: Without dead ends: 1263 [2021-10-07 16:40:32,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2242.9ms TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2021-10-07 16:40:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-10-07 16:40:32,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1263. [2021-10-07 16:40:32,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1098 states have (on average 4.045537340619308) internal successors, (4442), 1262 states have internal predecessors, (4442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:40:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 4442 transitions. [2021-10-07 16:40:32,516 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 4442 transitions. Word has length 3 [2021-10-07 16:40:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:40:32,517 INFO L470 AbstractCegarLoop]: Abstraction has 1263 states and 4442 transitions. [2021-10-07 16:40:32,517 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) [2021-10-07 16:40:32,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 4442 transitions. [2021-10-07 16:40:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:40:32,517 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:40:32,518 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:40:32,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 16:40:32,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:40:32,719 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:40:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:40:32,720 INFO L82 PathProgramCache]: Analyzing trace with hash 742803, now seen corresponding path program 1 times [2021-10-07 16:40:32,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:40:32,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346974188] [2021-10-07 16:40:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:40:32,722 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:40:32,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:40:32,723 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:40:32,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 16:40:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:40:32,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 16:40:32,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:40:33,069 INFO L354 Elim1Store]: treesize reduction 361, result has 14.7 percent of original size [2021-10-07 16:40:33,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 227 treesize of output 259 [2021-10-07 16:40:37,651 INFO L354 Elim1Store]: treesize reduction 186, result has 38.4 percent of original size [2021-10-07 16:40:37,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 216 [2021-10-07 16:41:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:41:02,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:41:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:41:02,296 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:41:02,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346974188] [2021-10-07 16:41:02,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346974188] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:41:02,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:41:02,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 1] imperfect sequences [] total 3 [2021-10-07 16:41:02,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009764812] [2021-10-07 16:41:02,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 16:41:02,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:41:02,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 16:41:02,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2021-10-07 16:41:02,299 INFO L87 Difference]: Start difference. First operand 1263 states and 4442 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-10-07 16:41:14,680 WARN L207 SmtUtils]: Spent 7.83 s on a formula simplification. DAG size of input: 135 DAG size of output: 64 [2021-10-07 16:41:24,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:41:24,441 INFO L93 Difference]: Finished difference Result 992 states and 3314 transitions. [2021-10-07 16:41:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:41:24,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 [2021-10-07 16:41:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:41:24,453 INFO L225 Difference]: With dead ends: 992 [2021-10-07 16:41:24,453 INFO L226 Difference]: Without dead ends: 992 [2021-10-07 16:41:24,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15976.3ms TimeCoverageRelationStatistics Valid=14, Invalid=12, Unknown=4, NotChecked=0, Total=30 [2021-10-07 16:41:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-10-07 16:41:24,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 992. [2021-10-07 16:41:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 873 states have (on average 3.7961053837342495) internal successors, (3314), 991 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:41:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3314 transitions. [2021-10-07 16:41:24,495 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3314 transitions. Word has length 3 [2021-10-07 16:41:24,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:41:24,495 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 3314 transitions. [2021-10-07 16:41:24,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-10-07 16:41:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3314 transitions. [2021-10-07 16:41:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:41:24,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:41:24,496 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 16:41:24,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-07 16:41:24,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:41:24,710 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:41:24,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:41:24,712 INFO L82 PathProgramCache]: Analyzing trace with hash 22998502, now seen corresponding path program 1 times [2021-10-07 16:41:24,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:41:24,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351107194] [2021-10-07 16:41:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:41:24,713 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:41:24,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:41:24,714 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:41:24,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 16:41:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:41:24,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:41:24,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:41:24,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:41:24,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:41:25,168 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:41:25,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:41:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:41:25,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:41:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:41:25,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:41:25,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351107194] [2021-10-07 16:41:25,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351107194] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:41:25,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:41:25,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:41:25,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398468197] [2021-10-07 16:41:25,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:41:25,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:41:25,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:41:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:41:25,808 INFO L87 Difference]: Start difference. First operand 992 states and 3314 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:41:33,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:41:33,309 INFO L93 Difference]: Finished difference Result 5915 states and 19825 transitions. [2021-10-07 16:41:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:41:33,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 16:41:33,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:41:33,377 INFO L225 Difference]: With dead ends: 5915 [2021-10-07 16:41:33,377 INFO L226 Difference]: Without dead ends: 5915 [2021-10-07 16:41:33,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 833.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:41:33,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-10-07 16:41:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 1000. [2021-10-07 16:41:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 881 states have (on average 3.7797956867196367) internal successors, (3330), 999 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:41:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 3330 transitions. [2021-10-07 16:41:33,509 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 3330 transitions. Word has length 4 [2021-10-07 16:41:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:41:33,510 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 3330 transitions. [2021-10-07 16:41:33,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:41:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 3330 transitions. [2021-10-07 16:41:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:41:33,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:41:33,511 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:41:33,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-07 16:41:33,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:41:33,724 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:41:33,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:41:33,726 INFO L82 PathProgramCache]: Analyzing trace with hash 713848281, now seen corresponding path program 1 times [2021-10-07 16:41:33,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:41:33,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721809686] [2021-10-07 16:41:33,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:41:33,727 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:41:33,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:41:33,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:41:33,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 16:41:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:41:33,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 16:41:33,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:41:34,140 INFO L354 Elim1Store]: treesize reduction 353, result has 14.9 percent of original size [2021-10-07 16:41:34,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 83 treesize of output 123 [2021-10-07 16:41:36,748 INFO L354 Elim1Store]: treesize reduction 186, result has 38.4 percent of original size [2021-10-07 16:41:36,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 210 [2021-10-07 16:42:05,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:42:05,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:42:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:42:05,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:42:05,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721809686] [2021-10-07 16:42:05,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721809686] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:42:05,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:42:05,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 1] imperfect sequences [] total 3 [2021-10-07 16:42:05,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607191921] [2021-10-07 16:42:05,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 16:42:05,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:42:05,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 16:42:05,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2021-10-07 16:42:05,879 INFO L87 Difference]: Start difference. First operand 1000 states and 3330 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:42:06,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:42:06,776 INFO L93 Difference]: Finished difference Result 941 states and 3149 transitions. [2021-10-07 16:42:06,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:42:06,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 16:42:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:42:06,785 INFO L225 Difference]: With dead ends: 941 [2021-10-07 16:42:06,785 INFO L226 Difference]: Without dead ends: 941 [2021-10-07 16:42:06,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10084.5ms TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2021-10-07 16:42:06,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-10-07 16:42:06,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 941. [2021-10-07 16:42:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 840 states have (on average 3.748809523809524) internal successors, (3149), 940 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:42:06,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3149 transitions. [2021-10-07 16:42:06,842 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3149 transitions. Word has length 5 [2021-10-07 16:42:06,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:42:06,843 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 3149 transitions. [2021-10-07 16:42:06,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:42:06,843 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3149 transitions. [2021-10-07 16:42:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:42:06,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:42:06,844 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:42:06,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 16:42:07,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:42:07,060 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:42:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:42:07,062 INFO L82 PathProgramCache]: Analyzing trace with hash 713848283, now seen corresponding path program 1 times [2021-10-07 16:42:07,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:42:07,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122188196] [2021-10-07 16:42:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:42:07,063 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:42:07,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:42:07,064 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:42:07,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 16:42:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:42:07,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:42:07,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:42:07,445 INFO L354 Elim1Store]: treesize reduction 239, result has 19.3 percent of original size [2021-10-07 16:42:07,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 92 [2021-10-07 16:42:07,455 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 119 treesize of output 117 [2021-10-07 16:42:09,720 INFO L354 Elim1Store]: treesize reduction 84, result has 36.8 percent of original size [2021-10-07 16:42:09,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 95 [2021-10-07 16:42:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:42:26,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:42:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:42:26,734 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:42:26,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122188196] [2021-10-07 16:42:26,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122188196] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:42:26,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:42:26,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-07 16:42:26,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386003627] [2021-10-07 16:42:26,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 16:42:26,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:42:26,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 16:42:26,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=17, Unknown=1, NotChecked=0, Total=30 [2021-10-07 16:42:26,737 INFO L87 Difference]: Start difference. First operand 941 states and 3149 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:42:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:42:35,925 INFO L93 Difference]: Finished difference Result 882 states and 2968 transitions. [2021-10-07 16:42:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:42:35,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 16:42:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:42:35,933 INFO L225 Difference]: With dead ends: 882 [2021-10-07 16:42:35,933 INFO L226 Difference]: Without dead ends: 882 [2021-10-07 16:42:35,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4336.7ms TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-10-07 16:42:35,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-10-07 16:42:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 882. [2021-10-07 16:42:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 799 states have (on average 3.7146433041301625) internal successors, (2968), 881 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:42:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2968 transitions. [2021-10-07 16:42:35,964 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2968 transitions. Word has length 5 [2021-10-07 16:42:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:42:35,965 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2968 transitions. [2021-10-07 16:42:35,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:42:35,965 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2968 transitions. [2021-10-07 16:42:35,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:42:35,966 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:42:35,966 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:42:35,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-07 16:42:36,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:42:36,179 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:42:36,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:42:36,180 INFO L82 PathProgramCache]: Analyzing trace with hash 654454133, now seen corresponding path program 1 times [2021-10-07 16:42:36,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:42:36,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828284283] [2021-10-07 16:42:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:42:36,182 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:42:36,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:42:36,183 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:42:36,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 16:42:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:42:36,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 16:42:36,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:42:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:42:36,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:42:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:42:36,422 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:42:36,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828284283] [2021-10-07 16:42:36,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828284283] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:42:36,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:42:36,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:42:36,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57342551] [2021-10-07 16:42:36,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:42:36,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:42:36,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:42:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:42:36,424 INFO L87 Difference]: Start difference. First operand 882 states and 2968 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:42:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:42:37,029 INFO L93 Difference]: Finished difference Result 1456 states and 4744 transitions. [2021-10-07 16:42:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:42:37,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 16:42:37,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:42:37,037 INFO L225 Difference]: With dead ends: 1456 [2021-10-07 16:42:37,038 INFO L226 Difference]: Without dead ends: 1456 [2021-10-07 16:42:37,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:42:37,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-10-07 16:42:37,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1176. [2021-10-07 16:42:37,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1093 states have (on average 3.646843549862763) internal successors, (3986), 1175 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:42:37,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3986 transitions. [2021-10-07 16:42:37,106 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3986 transitions. Word has length 6 [2021-10-07 16:42:37,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:42:37,107 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 3986 transitions. [2021-10-07 16:42:37,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:42:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3986 transitions. [2021-10-07 16:42:37,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:42:37,109 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:42:37,109 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:42:37,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-07 16:42:37,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:42:37,325 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:42:37,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:42:37,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1186551705, now seen corresponding path program 1 times [2021-10-07 16:42:37,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:42:37,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070926558] [2021-10-07 16:42:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:42:37,327 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:42:37,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:42:37,328 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:42:37,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 16:42:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:42:37,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:42:37,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:42:37,655 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:42:37,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 126 [2021-10-07 16:42:40,305 INFO L354 Elim1Store]: treesize reduction 175, result has 42.1 percent of original size [2021-10-07 16:42:40,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 106 treesize of output 217 [2021-10-07 16:43:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:43:02,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:43:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:43:02,865 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:43:02,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070926558] [2021-10-07 16:43:02,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070926558] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:43:02,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:43:02,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:43:02,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131842825] [2021-10-07 16:43:02,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:43:02,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:43:02,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:43:02,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:43:02,868 INFO L87 Difference]: Start difference. First operand 1176 states and 3986 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) [2021-10-07 16:43:03,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:43:03,064 INFO L93 Difference]: Finished difference Result 1107 states and 3784 transitions. [2021-10-07 16:43:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:43:03,065 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 [2021-10-07 16:43:03,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:43:03,070 INFO L225 Difference]: With dead ends: 1107 [2021-10-07 16:43:03,071 INFO L226 Difference]: Without dead ends: 1107 [2021-10-07 16:43:03,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:43:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-10-07 16:43:03,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1107. [2021-10-07 16:43:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1042 states have (on average 3.6314779270633397) internal successors, (3784), 1106 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:43:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 3784 transitions. [2021-10-07 16:43:03,111 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 3784 transitions. Word has length 7 [2021-10-07 16:43:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:43:03,112 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 3784 transitions. [2021-10-07 16:43:03,112 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) [2021-10-07 16:43:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 3784 transitions. [2021-10-07 16:43:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:43:03,113 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:43:03,113 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:43:03,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 16:43:03,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:43:03,328 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:43:03,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:43:03,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1186551704, now seen corresponding path program 1 times [2021-10-07 16:43:03,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:43:03,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488836519] [2021-10-07 16:43:03,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:43:03,330 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:43:03,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:43:03,331 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:43:03,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-07 16:43:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:43:03,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-07 16:43:03,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:43:03,696 INFO L354 Elim1Store]: treesize reduction 247, result has 16.6 percent of original size [2021-10-07 16:43:03,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 112 [2021-10-07 16:43:03,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:43:03,936 INFO L354 Elim1Store]: treesize reduction 328, result has 15.2 percent of original size [2021-10-07 16:43:03,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 181 [2021-10-07 16:43:05,991 INFO L354 Elim1Store]: treesize reduction 144, result has 12.7 percent of original size [2021-10-07 16:43:05,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 116 treesize of output 128 [2021-10-07 16:43:06,100 INFO L354 Elim1Store]: treesize reduction 74, result has 34.5 percent of original size [2021-10-07 16:43:06,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 115 treesize of output 141 [2021-10-07 16:43:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:43:10,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:43:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:43:11,221 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:43:11,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488836519] [2021-10-07 16:43:11,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488836519] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:43:11,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:43:11,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 5 [2021-10-07 16:43:11,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111003184] [2021-10-07 16:43:11,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-07 16:43:11,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:43:11,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-07 16:43:11,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=25, Unknown=1, NotChecked=0, Total=42 [2021-10-07 16:43:11,224 INFO L87 Difference]: Start difference. First operand 1107 states and 3784 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:43:17,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:43:17,794 INFO L93 Difference]: Finished difference Result 1038 states and 3582 transitions. [2021-10-07 16:43:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:43:17,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:43:17,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:43:17,801 INFO L225 Difference]: With dead ends: 1038 [2021-10-07 16:43:17,801 INFO L226 Difference]: Without dead ends: 1038 [2021-10-07 16:43:17,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2398.0ms TimeCoverageRelationStatistics Valid=23, Invalid=32, Unknown=1, NotChecked=0, Total=56 [2021-10-07 16:43:17,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-10-07 16:43:17,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1038. [2021-10-07 16:43:17,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 991 states have (on average 3.6145307769929365) internal successors, (3582), 1037 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:43:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3582 transitions. [2021-10-07 16:43:17,835 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3582 transitions. Word has length 7 [2021-10-07 16:43:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:43:17,836 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 3582 transitions. [2021-10-07 16:43:17,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:43:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3582 transitions. [2021-10-07 16:43:17,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:43:17,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:43:17,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:43:17,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-07 16:43:18,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:43:18,038 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:43:18,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:43:18,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1871596926, now seen corresponding path program 1 times [2021-10-07 16:43:18,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:43:18,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38508263] [2021-10-07 16:43:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:43:18,041 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:43:18,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:43:18,042 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:43:18,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-07 16:43:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:43:18,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:43:18,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:43:18,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-07 16:43:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:43:18,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:43:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:43:18,241 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:43:18,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38508263] [2021-10-07 16:43:18,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38508263] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:43:18,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:43:18,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-07 16:43:18,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097329528] [2021-10-07 16:43:18,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:43:18,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:43:18,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:43:18,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:43:18,244 INFO L87 Difference]: Start difference. First operand 1038 states and 3582 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:43:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:43:18,419 INFO L93 Difference]: Finished difference Result 798 states and 2750 transitions. [2021-10-07 16:43:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:43:18,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 8 [2021-10-07 16:43:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:43:18,425 INFO L225 Difference]: With dead ends: 798 [2021-10-07 16:43:18,425 INFO L226 Difference]: Without dead ends: 798 [2021-10-07 16:43:18,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 16:43:18,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-10-07 16:43:18,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 798. [2021-10-07 16:43:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 772 states have (on average 3.562176165803109) internal successors, (2750), 797 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:43:18,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2750 transitions. [2021-10-07 16:43:18,452 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2750 transitions. Word has length 8 [2021-10-07 16:43:18,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:43:18,453 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 2750 transitions. [2021-10-07 16:43:18,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:43:18,453 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2750 transitions. [2021-10-07 16:43:18,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:43:18,454 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:43:18,454 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:43:18,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-07 16:43:18,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:43:18,670 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:43:18,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:43:18,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1871596927, now seen corresponding path program 1 times [2021-10-07 16:43:18,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:43:18,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764469500] [2021-10-07 16:43:18,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:43:18,672 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:43:18,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:43:18,673 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:43:18,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-07 16:43:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:43:18,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:43:18,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:43:18,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-07 16:43:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:43:18,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:43:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:43:19,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:43:19,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764469500] [2021-10-07 16:43:19,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764469500] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:43:19,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:43:19,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-10-07 16:43:19,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613658578] [2021-10-07 16:43:19,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:43:19,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:43:19,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:43:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:43:19,328 INFO L87 Difference]: Start difference. First operand 798 states and 2750 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) [2021-10-07 16:43:20,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:43:20,129 INFO L93 Difference]: Finished difference Result 1750 states and 6198 transitions. [2021-10-07 16:43:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 16:43:20,130 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 [2021-10-07 16:43:20,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:43:20,139 INFO L225 Difference]: With dead ends: 1750 [2021-10-07 16:43:20,140 INFO L226 Difference]: Without dead ends: 1750 [2021-10-07 16:43:20,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-10-07 16:43:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2021-10-07 16:43:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1174. [2021-10-07 16:43:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1148 states have (on average 4.047038327526132) internal successors, (4646), 1173 states have internal predecessors, (4646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:43:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 4646 transitions. [2021-10-07 16:43:20,190 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 4646 transitions. Word has length 8 [2021-10-07 16:43:20,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:43:20,191 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 4646 transitions. [2021-10-07 16:43:20,191 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) [2021-10-07 16:43:20,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 4646 transitions. [2021-10-07 16:43:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:43:20,192 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:43:20,192 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:43:20,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-07 16:43:20,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:43:20,406 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:43:20,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:43:20,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1871596819, now seen corresponding path program 1 times [2021-10-07 16:43:20,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:43:20,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071201241] [2021-10-07 16:43:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:43:20,408 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:43:20,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:43:20,409 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:43:20,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-07 16:43:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:43:20,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 16:43:20,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:43:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:43:20,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:43:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:43:20,737 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:43:20,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071201241] [2021-10-07 16:43:20,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071201241] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:43:20,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:43:20,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:43:20,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546674369] [2021-10-07 16:43:20,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:43:20,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:43:20,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:43:20,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:43:20,739 INFO L87 Difference]: Start difference. First operand 1174 states and 4646 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:43:21,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:43:21,207 INFO L93 Difference]: Finished difference Result 1038 states and 3897 transitions. [2021-10-07 16:43:21,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:43:21,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 16:43:21,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:43:21,214 INFO L225 Difference]: With dead ends: 1038 [2021-10-07 16:43:21,214 INFO L226 Difference]: Without dead ends: 1038 [2021-10-07 16:43:21,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:43:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-10-07 16:43:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1004. [2021-10-07 16:43:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 978 states have (on average 3.918200408997955) internal successors, (3832), 1003 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:43:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3832 transitions. [2021-10-07 16:43:21,251 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3832 transitions. Word has length 8 [2021-10-07 16:43:21,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:43:21,252 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 3832 transitions. [2021-10-07 16:43:21,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:43:21,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3832 transitions. [2021-10-07 16:43:21,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:43:21,253 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:43:21,253 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:43:21,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-07 16:43:21,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:43:21,469 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:43:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:43:21,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1978952308, now seen corresponding path program 1 times [2021-10-07 16:43:21,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:43:21,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447886395] [2021-10-07 16:43:21,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:43:21,471 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:43:21,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:43:21,472 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:43:21,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-07 16:43:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:43:21,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:43:21,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:43:21,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:43:21,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:43:21,935 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:43:21,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 98 [2021-10-07 16:43:22,212 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:43:22,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 143 [2021-10-07 16:44:06,502 INFO L354 Elim1Store]: treesize reduction 49, result has 59.5 percent of original size [2021-10-07 16:44:06,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 306 treesize of output 359 [2021-10-07 16:44:06,611 INFO L354 Elim1Store]: treesize reduction 156, result has 16.1 percent of original size [2021-10-07 16:44:06,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 359 treesize of output 339 [2021-10-07 16:44:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:44:12,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:44:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:44:12,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:44:12,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447886395] [2021-10-07 16:44:12,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447886395] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:44:12,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:44:12,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-10-07 16:44:12,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377710343] [2021-10-07 16:44:12,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 16:44:12,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:44:12,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 16:44:12,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:44:12,886 INFO L87 Difference]: Start difference. First operand 1004 states and 3832 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:20,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:44:20,974 INFO L93 Difference]: Finished difference Result 9328 states and 36463 transitions. [2021-10-07 16:44:20,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 16:44:20,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 16:44:20,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:44:21,026 INFO L225 Difference]: With dead ends: 9328 [2021-10-07 16:44:21,026 INFO L226 Difference]: Without dead ends: 9328 [2021-10-07 16:44:21,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 8230.3ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-10-07 16:44:21,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2021-10-07 16:44:21,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 1304. [2021-10-07 16:44:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1278 states have (on average 4.165884194053208) internal successors, (5324), 1303 states have internal predecessors, (5324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 5324 transitions. [2021-10-07 16:44:21,167 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 5324 transitions. Word has length 8 [2021-10-07 16:44:21,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:44:21,167 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 5324 transitions. [2021-10-07 16:44:21,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:21,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 5324 transitions. [2021-10-07 16:44:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:44:21,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:44:21,174 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:44:21,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-07 16:44:21,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:44:21,387 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:44:21,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:44:21,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1978952309, now seen corresponding path program 1 times [2021-10-07 16:44:21,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:44:21,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080100549] [2021-10-07 16:44:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:44:21,389 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:44:21,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:44:21,390 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:44:21,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-07 16:44:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:44:21,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 16:44:21,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:44:21,810 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:44:21,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:44:22,298 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-07 16:44:22,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-10-07 16:44:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 16:44:22,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:44:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 16:44:26,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:44:26,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080100549] [2021-10-07 16:44:26,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080100549] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:44:26,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:44:26,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 5 [2021-10-07 16:44:26,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791697855] [2021-10-07 16:44:26,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-07 16:44:26,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:44:26,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-07 16:44:26,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=23, Unknown=2, NotChecked=0, Total=42 [2021-10-07 16:44:26,512 INFO L87 Difference]: Start difference. First operand 1304 states and 5324 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:44:26,709 INFO L93 Difference]: Finished difference Result 1076 states and 4120 transitions. [2021-10-07 16:44:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:44:26,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 16:44:26,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:44:26,714 INFO L225 Difference]: With dead ends: 1076 [2021-10-07 16:44:26,714 INFO L226 Difference]: Without dead ends: 1076 [2021-10-07 16:44:26,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4118.5ms TimeCoverageRelationStatistics Valid=17, Invalid=23, Unknown=2, NotChecked=0, Total=42 [2021-10-07 16:44:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-10-07 16:44:26,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1076. [2021-10-07 16:44:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1062 states have (on average 3.879472693032015) internal successors, (4120), 1075 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 4120 transitions. [2021-10-07 16:44:26,746 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 4120 transitions. Word has length 8 [2021-10-07 16:44:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:44:26,746 INFO L470 AbstractCegarLoop]: Abstraction has 1076 states and 4120 transitions. [2021-10-07 16:44:26,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 4120 transitions. [2021-10-07 16:44:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:44:26,747 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:44:26,747 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-07 16:44:26,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-07 16:44:26,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:44:26,960 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:44:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:44:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1124814822, now seen corresponding path program 2 times [2021-10-07 16:44:26,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:44:26,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868938780] [2021-10-07 16:44:26,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:44:26,963 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:44:26,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:44:26,964 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:44:26,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-07 16:44:27,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:44:27,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:44:27,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:44:27,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:44:27,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:44:27,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:44:27,452 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:44:27,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:44:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:44:27,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:44:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:44:29,603 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:44:29,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868938780] [2021-10-07 16:44:29,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868938780] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:44:29,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:44:29,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:44:29,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151159802] [2021-10-07 16:44:29,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:44:29,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:44:29,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:44:29,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:44:29,605 INFO L87 Difference]: Start difference. First operand 1076 states and 4120 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:49,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:44:49,408 INFO L93 Difference]: Finished difference Result 7618 states and 30123 transitions. [2021-10-07 16:44:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 16:44:49,410 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 16:44:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:44:49,478 INFO L225 Difference]: With dead ends: 7618 [2021-10-07 16:44:49,478 INFO L226 Difference]: Without dead ends: 7618 [2021-10-07 16:44:49,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5867.8ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:44:49,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7618 states. [2021-10-07 16:44:49,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7618 to 1088. [2021-10-07 16:44:49,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1074 states have (on average 3.8584729981378025) internal successors, (4144), 1087 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 4144 transitions. [2021-10-07 16:44:49,590 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 4144 transitions. Word has length 8 [2021-10-07 16:44:49,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:44:49,590 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 4144 transitions. [2021-10-07 16:44:49,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:49,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 4144 transitions. [2021-10-07 16:44:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 16:44:49,592 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:44:49,592 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:44:49,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-07 16:44:49,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:44:49,807 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:44:49,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:44:49,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1217983009, now seen corresponding path program 1 times [2021-10-07 16:44:49,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:44:49,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533318729] [2021-10-07 16:44:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:44:49,809 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:44:49,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:44:49,811 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:44:49,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-07 16:44:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:44:50,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 16:44:50,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:44:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:44:50,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:44:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:44:50,313 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:44:50,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533318729] [2021-10-07 16:44:50,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533318729] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:44:50,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:44:50,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:44:50,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606279400] [2021-10-07 16:44:50,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:44:50,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:44:50,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:44:50,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:44:50,315 INFO L87 Difference]: Start difference. First operand 1088 states and 4144 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:51,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:44:51,264 INFO L93 Difference]: Finished difference Result 2186 states and 8170 transitions. [2021-10-07 16:44:51,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 16:44:51,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 16:44:51,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:44:51,274 INFO L225 Difference]: With dead ends: 2186 [2021-10-07 16:44:51,275 INFO L226 Difference]: Without dead ends: 2186 [2021-10-07 16:44:51,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-10-07 16:44:51,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2021-10-07 16:44:51,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 1750. [2021-10-07 16:44:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1736 states have (on average 3.9608294930875574) internal successors, (6876), 1749 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 6876 transitions. [2021-10-07 16:44:51,376 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 6876 transitions. Word has length 9 [2021-10-07 16:44:51,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:44:51,377 INFO L470 AbstractCegarLoop]: Abstraction has 1750 states and 6876 transitions. [2021-10-07 16:44:51,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:51,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 6876 transitions. [2021-10-07 16:44:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:44:51,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:44:51,378 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:44:51,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-07 16:44:51,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:44:51,596 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:44:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:44:51,597 INFO L82 PathProgramCache]: Analyzing trace with hash -980518428, now seen corresponding path program 1 times [2021-10-07 16:44:51,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:44:51,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005772409] [2021-10-07 16:44:51,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:44:51,598 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:44:51,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:44:51,599 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:44:51,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-07 16:44:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:44:51,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:44:51,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:44:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:44:51,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:44:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:44:51,871 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:44:51,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005772409] [2021-10-07 16:44:51,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005772409] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:44:51,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:44:51,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-07 16:44:51,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892553228] [2021-10-07 16:44:51,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 16:44:51,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:44:51,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 16:44:51,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:44:51,873 INFO L87 Difference]: Start difference. First operand 1750 states and 6876 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:51,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:44:51,960 INFO L93 Difference]: Finished difference Result 2060 states and 7672 transitions. [2021-10-07 16:44:51,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:44:51,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 16:44:51,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:44:51,969 INFO L225 Difference]: With dead ends: 2060 [2021-10-07 16:44:51,969 INFO L226 Difference]: Without dead ends: 2060 [2021-10-07 16:44:51,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:44:51,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-10-07 16:44:52,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1786. [2021-10-07 16:44:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1772 states have (on average 3.9034988713318284) internal successors, (6917), 1785 states have internal predecessors, (6917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 6917 transitions. [2021-10-07 16:44:52,021 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 6917 transitions. Word has length 10 [2021-10-07 16:44:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:44:52,022 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 6917 transitions. [2021-10-07 16:44:52,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:44:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 6917 transitions. [2021-10-07 16:44:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:44:52,023 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:44:52,023 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:44:52,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-07 16:44:52,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:44:52,235 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:44:52,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:44:52,236 INFO L82 PathProgramCache]: Analyzing trace with hash -890943918, now seen corresponding path program 1 times [2021-10-07 16:44:52,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:44:52,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251444571] [2021-10-07 16:44:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:44:52,237 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:44:52,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:44:52,240 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:44:52,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-07 16:44:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:44:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:44:52,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:44:52,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:44:52,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:44:52,823 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:44:52,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 98 [2021-10-07 16:44:53,069 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:44:53,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 143 [2021-10-07 16:45:34,585 INFO L354 Elim1Store]: treesize reduction 49, result has 59.5 percent of original size [2021-10-07 16:45:34,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 308 treesize of output 361 [2021-10-07 16:45:34,691 INFO L354 Elim1Store]: treesize reduction 156, result has 16.1 percent of original size [2021-10-07 16:45:34,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 361 treesize of output 341 [2021-10-07 16:45:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:45:57,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:45:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:45:58,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:45:58,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251444571] [2021-10-07 16:45:58,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251444571] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:45:58,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:45:58,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-10-07 16:45:58,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966566398] [2021-10-07 16:45:58,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 16:45:58,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:45:58,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 16:45:58,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:45:58,271 INFO L87 Difference]: Start difference. First operand 1786 states and 6917 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:46:07,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:46:07,924 INFO L93 Difference]: Finished difference Result 3955 states and 14179 transitions. [2021-10-07 16:46:07,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 16:46:07,926 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 16:46:07,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:46:07,937 INFO L225 Difference]: With dead ends: 3955 [2021-10-07 16:46:07,937 INFO L226 Difference]: Without dead ends: 3955 [2021-10-07 16:46:07,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 10438.2ms TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-10-07 16:46:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2021-10-07 16:46:08,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 1854. [2021-10-07 16:46:08,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1840 states have (on average 3.8864130434782607) internal successors, (7151), 1853 states have internal predecessors, (7151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:46:08,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 7151 transitions. [2021-10-07 16:46:08,022 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 7151 transitions. Word has length 10 [2021-10-07 16:46:08,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:46:08,023 INFO L470 AbstractCegarLoop]: Abstraction has 1854 states and 7151 transitions. [2021-10-07 16:46:08,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:46:08,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 7151 transitions. [2021-10-07 16:46:08,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 16:46:08,024 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:46:08,024 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:46:08,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-07 16:46:08,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:46:08,240 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:46:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:46:08,241 INFO L82 PathProgramCache]: Analyzing trace with hash 483289440, now seen corresponding path program 2 times [2021-10-07 16:46:08,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:46:08,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217027486] [2021-10-07 16:46:08,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:46:08,242 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:46:08,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:46:08,243 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:46:08,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-07 16:46:08,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:46:08,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:46:08,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 16:46:08,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:46:08,791 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:46:08,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 98 [2021-10-07 16:46:09,052 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:46:09,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 143 [2021-10-07 16:46:56,383 INFO L354 Elim1Store]: treesize reduction 49, result has 59.5 percent of original size [2021-10-07 16:46:56,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 300 treesize of output 353 [2021-10-07 16:46:56,501 INFO L354 Elim1Store]: treesize reduction 156, result has 16.1 percent of original size [2021-10-07 16:46:56,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 353 treesize of output 331 [2021-10-07 16:47:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:47:14,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:47:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:47:17,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:47:17,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217027486] [2021-10-07 16:47:17,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217027486] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:47:17,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:47:17,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2021-10-07 16:47:17,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81946693] [2021-10-07 16:47:17,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-07 16:47:17,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:47:17,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-07 16:47:17,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:47:17,170 INFO L87 Difference]: Start difference. First operand 1854 states and 7151 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:47:31,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:47:31,914 INFO L93 Difference]: Finished difference Result 3852 states and 13898 transitions. [2021-10-07 16:47:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-07 16:47:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 16:47:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:47:31,926 INFO L225 Difference]: With dead ends: 3852 [2021-10-07 16:47:31,927 INFO L226 Difference]: Without dead ends: 3852 [2021-10-07 16:47:31,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 14209.2ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:47:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3852 states. [2021-10-07 16:47:31,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3852 to 1680. [2021-10-07 16:47:31,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1666 states have (on average 3.909363745498199) internal successors, (6513), 1679 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:47:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6513 transitions. [2021-10-07 16:47:31,975 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6513 transitions. Word has length 11 [2021-10-07 16:47:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:47:31,975 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6513 transitions. [2021-10-07 16:47:31,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:47:31,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6513 transitions. [2021-10-07 16:47:31,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:47:31,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:47:31,977 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-07 16:47:31,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-07 16:47:32,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:47:32,191 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:47:32,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:47:32,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2097074357, now seen corresponding path program 3 times [2021-10-07 16:47:32,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:47:32,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449439508] [2021-10-07 16:47:32,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:47:32,193 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:47:32,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:47:32,194 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:47:32,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-07 16:47:32,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:47:32,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:47:32,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 16:47:32,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:47:32,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:47:32,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:47:32,766 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:47:32,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 98 [2021-10-07 16:47:33,117 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:47:33,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 143 [2021-10-07 16:48:24,779 INFO L354 Elim1Store]: treesize reduction 49, result has 59.5 percent of original size [2021-10-07 16:48:24,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 296 treesize of output 349 [2021-10-07 16:48:24,938 INFO L354 Elim1Store]: treesize reduction 156, result has 16.1 percent of original size [2021-10-07 16:48:24,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 349 treesize of output 329 [2021-10-07 16:48:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:48:45,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:48:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:48:47,192 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:48:47,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449439508] [2021-10-07 16:48:47,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449439508] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:48:47,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:48:47,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2021-10-07 16:48:47,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82118293] [2021-10-07 16:48:47,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 16:48:47,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:48:47,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 16:48:47,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-07 16:48:47,195 INFO L87 Difference]: Start difference. First operand 1680 states and 6513 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:48:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:48:59,948 INFO L93 Difference]: Finished difference Result 3810 states and 14170 transitions. [2021-10-07 16:48:59,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 16:48:59,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 16:48:59,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:48:59,962 INFO L225 Difference]: With dead ends: 3810 [2021-10-07 16:48:59,962 INFO L226 Difference]: Without dead ends: 3810 [2021-10-07 16:48:59,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 10947.1ms TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-10-07 16:48:59,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-10-07 16:49:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 2312. [2021-10-07 16:49:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2298 states have (on average 4.160574412532637) internal successors, (9561), 2311 states have internal predecessors, (9561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:49:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 9561 transitions. [2021-10-07 16:49:00,021 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 9561 transitions. Word has length 12 [2021-10-07 16:49:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:49:00,021 INFO L470 AbstractCegarLoop]: Abstraction has 2312 states and 9561 transitions. [2021-10-07 16:49:00,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:49:00,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 9561 transitions. [2021-10-07 16:49:00,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:49:00,022 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:49:00,023 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:49:00,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-07 16:49:00,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:49:00,237 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:49:00,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:49:00,238 INFO L82 PathProgramCache]: Analyzing trace with hash 788196179, now seen corresponding path program 1 times [2021-10-07 16:49:00,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:49:00,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839731102] [2021-10-07 16:49:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:49:00,239 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:49:00,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:49:00,241 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:49:00,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-07 16:49:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:49:00,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 16:49:00,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:49:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:49:00,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:49:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:49:00,906 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:49:00,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839731102] [2021-10-07 16:49:00,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839731102] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:49:00,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:49:00,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:49:00,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73861745] [2021-10-07 16:49:00,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:49:00,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:49:00,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:49:00,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:49:00,908 INFO L87 Difference]: Start difference. First operand 2312 states and 9561 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:49:01,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:49:01,717 INFO L93 Difference]: Finished difference Result 2300 states and 9089 transitions. [2021-10-07 16:49:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 16:49:01,718 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 16:49:01,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:49:01,724 INFO L225 Difference]: With dead ends: 2300 [2021-10-07 16:49:01,724 INFO L226 Difference]: Without dead ends: 2300 [2021-10-07 16:49:01,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 357.1ms TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-10-07 16:49:01,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-10-07 16:49:01,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2208. [2021-10-07 16:49:01,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2194 states have (on average 4.056973564266181) internal successors, (8901), 2207 states have internal predecessors, (8901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:49:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 8901 transitions. [2021-10-07 16:49:01,771 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 8901 transitions. Word has length 13 [2021-10-07 16:49:01,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:49:01,772 INFO L470 AbstractCegarLoop]: Abstraction has 2208 states and 8901 transitions. [2021-10-07 16:49:01,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:49:01,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 8901 transitions. [2021-10-07 16:49:01,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:49:01,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:49:01,773 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1] [2021-10-07 16:49:01,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-07 16:49:01,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:49:01,974 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:49:01,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:49:01,975 INFO L82 PathProgramCache]: Analyzing trace with hash -441540496, now seen corresponding path program 1 times [2021-10-07 16:49:01,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:49:01,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923643630] [2021-10-07 16:49:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:49:01,976 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:49:01,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:49:01,978 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:49:01,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-07 16:49:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:49:02,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-07 16:49:02,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:49:02,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-10-07 16:49:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:49:02,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:49:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:49:05,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:49:05,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923643630] [2021-10-07 16:49:05,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923643630] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:49:05,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:49:05,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-07 16:49:05,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511450974] [2021-10-07 16:49:05,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-07 16:49:05,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:49:05,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-07 16:49:05,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-10-07 16:49:05,535 INFO L87 Difference]: Start difference. First operand 2208 states and 8901 transitions. Second operand has 25 states, 25 states have (on average 1.04) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:49:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:49:22,060 INFO L93 Difference]: Finished difference Result 20198 states and 84770 transitions. [2021-10-07 16:49:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 16:49:22,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.04) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 16:49:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:49:22,166 INFO L225 Difference]: With dead ends: 20198 [2021-10-07 16:49:22,166 INFO L226 Difference]: Without dead ends: 20198 [2021-10-07 16:49:22,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 5244.4ms TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 16:49:22,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20198 states. [2021-10-07 16:49:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20198 to 2215. [2021-10-07 16:49:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2215 states, 2201 states have (on average 4.049977283053158) internal successors, (8914), 2214 states have internal predecessors, (8914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:49:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 8914 transitions. [2021-10-07 16:49:22,640 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 8914 transitions. Word has length 13 [2021-10-07 16:49:22,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:49:22,640 INFO L470 AbstractCegarLoop]: Abstraction has 2215 states and 8914 transitions. [2021-10-07 16:49:22,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.04) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:49:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 8914 transitions. [2021-10-07 16:49:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:49:22,642 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:49:22,642 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:49:22,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-07 16:49:22,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:49:22,856 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:49:22,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:49:22,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1619771866, now seen corresponding path program 2 times [2021-10-07 16:49:22,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:49:22,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531241291] [2021-10-07 16:49:22,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:49:22,859 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:49:22,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:49:22,860 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:49:22,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-07 16:49:23,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 16:49:23,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:49:23,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:49:23,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:49:23,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:49:23,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:49:23,417 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:49:23,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 98 [2021-10-07 16:49:23,704 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:49:23,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 143 [2021-10-07 16:50:44,379 INFO L354 Elim1Store]: treesize reduction 49, result has 59.5 percent of original size [2021-10-07 16:50:44,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 300 treesize of output 353 [2021-10-07 16:50:44,493 INFO L354 Elim1Store]: treesize reduction 156, result has 16.1 percent of original size [2021-10-07 16:50:44,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 353 treesize of output 333 [2021-10-07 16:51:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-07 16:51:10,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:51:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-07 16:51:10,721 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:51:10,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531241291] [2021-10-07 16:51:10,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531241291] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:51:10,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:51:10,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 7 [2021-10-07 16:51:10,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305115044] [2021-10-07 16:51:10,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 16:51:10,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:51:10,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 16:51:10,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-07 16:51:10,726 INFO L87 Difference]: Start difference. First operand 2215 states and 8914 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:14,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:51:14,071 INFO L93 Difference]: Finished difference Result 2215 states and 8651 transitions. [2021-10-07 16:51:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 16:51:14,072 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 16:51:14,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:51:14,079 INFO L225 Difference]: With dead ends: 2215 [2021-10-07 16:51:14,079 INFO L226 Difference]: Without dead ends: 2215 [2021-10-07 16:51:14,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2996.4ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:51:14,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-10-07 16:51:14,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 1861. [2021-10-07 16:51:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1847 states have (on average 3.9956686518678937) internal successors, (7380), 1860 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 7380 transitions. [2021-10-07 16:51:14,128 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 7380 transitions. Word has length 13 [2021-10-07 16:51:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:51:14,128 INFO L470 AbstractCegarLoop]: Abstraction has 1861 states and 7380 transitions. [2021-10-07 16:51:14,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 7380 transitions. [2021-10-07 16:51:14,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 16:51:14,130 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:51:14,130 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1] [2021-10-07 16:51:14,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-07 16:51:14,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:51:14,333 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:51:14,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:51:14,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1459754287, now seen corresponding path program 2 times [2021-10-07 16:51:14,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:51:14,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164212566] [2021-10-07 16:51:14,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:51:14,337 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:51:14,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:51:14,339 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:51:14,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-07 16:51:14,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:51:14,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:51:14,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 16:51:14,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:51:14,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-10-07 16:51:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:51:15,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:51:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:51:19,023 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:51:19,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164212566] [2021-10-07 16:51:19,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164212566] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:51:19,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:51:19,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 27 [2021-10-07 16:51:19,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886119756] [2021-10-07 16:51:19,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-07 16:51:19,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:51:19,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-07 16:51:19,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-10-07 16:51:19,025 INFO L87 Difference]: Start difference. First operand 1861 states and 7380 transitions. Second operand has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:51:41,963 INFO L93 Difference]: Finished difference Result 24442 states and 100455 transitions. [2021-10-07 16:51:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-07 16:51:41,964 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 16:51:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:51:42,058 INFO L225 Difference]: With dead ends: 24442 [2021-10-07 16:51:42,058 INFO L226 Difference]: Without dead ends: 24442 [2021-10-07 16:51:42,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 8855.8ms TimeCoverageRelationStatistics Valid=516, Invalid=2240, Unknown=0, NotChecked=0, Total=2756 [2021-10-07 16:51:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24442 states. [2021-10-07 16:51:42,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24442 to 1874. [2021-10-07 16:51:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 1860 states have (on average 3.982258064516129) internal successors, (7407), 1873 states have internal predecessors, (7407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 7407 transitions. [2021-10-07 16:51:42,548 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 7407 transitions. Word has length 15 [2021-10-07 16:51:42,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:51:42,549 INFO L470 AbstractCegarLoop]: Abstraction has 1874 states and 7407 transitions. [2021-10-07 16:51:42,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:42,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 7407 transitions. [2021-10-07 16:51:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 16:51:42,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:51:42,556 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:51:42,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-07 16:51:42,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:51:42,764 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:51:42,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:51:42,765 INFO L82 PathProgramCache]: Analyzing trace with hash 570721871, now seen corresponding path program 1 times [2021-10-07 16:51:42,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:51:42,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636651684] [2021-10-07 16:51:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:51:42,766 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:51:42,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:51:42,767 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:51:42,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-07 16:51:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:51:43,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 16:51:43,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:51:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 16:51:43,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:51:43,453 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 [2021-10-07 16:51:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 16:51:43,630 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:51:43,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636651684] [2021-10-07 16:51:43,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636651684] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:51:43,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:51:43,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-07 16:51:43,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365978379] [2021-10-07 16:51:43,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:51:43,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:51:43,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:51:43,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:51:43,632 INFO L87 Difference]: Start difference. First operand 1874 states and 7407 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:44,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:51:44,524 INFO L93 Difference]: Finished difference Result 3198 states and 12829 transitions. [2021-10-07 16:51:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 16:51:44,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 16:51:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:51:44,534 INFO L225 Difference]: With dead ends: 3198 [2021-10-07 16:51:44,534 INFO L226 Difference]: Without dead ends: 3198 [2021-10-07 16:51:44,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 444.5ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-10-07 16:51:44,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-10-07 16:51:44,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 2166. [2021-10-07 16:51:44,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2152 states have (on average 4.237918215613383) internal successors, (9120), 2165 states have internal predecessors, (9120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:44,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 9120 transitions. [2021-10-07 16:51:44,638 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 9120 transitions. Word has length 16 [2021-10-07 16:51:44,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:51:44,638 INFO L470 AbstractCegarLoop]: Abstraction has 2166 states and 9120 transitions. [2021-10-07 16:51:44,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:44,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 9120 transitions. [2021-10-07 16:51:44,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 16:51:44,641 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:51:44,641 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:51:44,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-07 16:51:44,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:51:44,853 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:51:44,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:51:44,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1381392215, now seen corresponding path program 2 times [2021-10-07 16:51:44,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:51:44,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762185868] [2021-10-07 16:51:44,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:51:44,855 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:51:44,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:51:44,856 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:51:44,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-07 16:51:45,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 16:51:45,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:51:45,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 16:51:45,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:51:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 16:51:45,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:51:45,444 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 35 treesize of output 31 [2021-10-07 16:51:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 16:51:45,819 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:51:45,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762185868] [2021-10-07 16:51:45,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762185868] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:51:45,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:51:45,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-07 16:51:45,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470876446] [2021-10-07 16:51:45,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:51:45,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:51:45,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:51:45,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:51:45,820 INFO L87 Difference]: Start difference. First operand 2166 states and 9120 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:47,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:51:47,384 INFO L93 Difference]: Finished difference Result 4716 states and 19621 transitions. [2021-10-07 16:51:47,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 16:51:47,386 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 16:51:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:51:47,400 INFO L225 Difference]: With dead ends: 4716 [2021-10-07 16:51:47,400 INFO L226 Difference]: Without dead ends: 4716 [2021-10-07 16:51:47,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 820.6ms TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2021-10-07 16:51:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4716 states. [2021-10-07 16:51:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4716 to 2230. [2021-10-07 16:51:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2216 states have (on average 4.262635379061372) internal successors, (9446), 2229 states have internal predecessors, (9446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 9446 transitions. [2021-10-07 16:51:47,490 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 9446 transitions. Word has length 16 [2021-10-07 16:51:47,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:51:47,490 INFO L470 AbstractCegarLoop]: Abstraction has 2230 states and 9446 transitions. [2021-10-07 16:51:47,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 9446 transitions. [2021-10-07 16:51:47,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 16:51:47,492 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:51:47,492 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:51:47,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-07 16:51:47,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:51:47,706 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:51:47,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:51:47,707 INFO L82 PathProgramCache]: Analyzing trace with hash -203377161, now seen corresponding path program 3 times [2021-10-07 16:51:47,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:51:47,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208350704] [2021-10-07 16:51:47,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:51:47,708 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:51:47,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:51:47,709 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) [2021-10-07 16:51:47,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-07 16:51:48,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-07 16:51:48,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:51:48,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 16:51:48,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:51:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 16:51:48,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:51:48,325 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 35 treesize of output 31 [2021-10-07 16:51:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 16:51:48,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:51:48,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208350704] [2021-10-07 16:51:48,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208350704] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:51:48,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:51:48,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-07 16:51:48,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911093833] [2021-10-07 16:51:48,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:51:48,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:51:48,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:51:48,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:51:48,691 INFO L87 Difference]: Start difference. First operand 2230 states and 9446 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:49,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:51:49,549 INFO L93 Difference]: Finished difference Result 4122 states and 17453 transitions. [2021-10-07 16:51:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:51:49,551 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 16:51:49,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:51:49,608 INFO L225 Difference]: With dead ends: 4122 [2021-10-07 16:51:49,608 INFO L226 Difference]: Without dead ends: 4122 [2021-10-07 16:51:49,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 458.5ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:51:49,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-10-07 16:51:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 2134. [2021-10-07 16:51:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 2120 states have (on average 4.230188679245283) internal successors, (8968), 2133 states have internal predecessors, (8968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 8968 transitions. [2021-10-07 16:51:49,661 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 8968 transitions. Word has length 16 [2021-10-07 16:51:49,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:51:49,661 INFO L470 AbstractCegarLoop]: Abstraction has 2134 states and 8968 transitions. [2021-10-07 16:51:49,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:49,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 8968 transitions. [2021-10-07 16:51:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 16:51:49,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:51:49,664 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-07 16:51:49,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-07 16:51:49,874 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 [2021-10-07 16:51:49,874 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:51:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:51:49,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1370147701, now seen corresponding path program 4 times [2021-10-07 16:51:49,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:51:49,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105097374] [2021-10-07 16:51:49,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:51:49,877 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:51:49,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:51:49,878 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) [2021-10-07 16:51:49,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-07 16:51:50,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:51:50,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:51:50,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:51:50,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:51:50,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:51:50,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:51:50,561 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:51:50,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:51:50,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 16:51:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-07 16:51:50,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:51:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-07 16:51:51,280 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:51:51,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105097374] [2021-10-07 16:51:51,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105097374] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:51:51,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:51:51,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-07 16:51:51,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785355106] [2021-10-07 16:51:51,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:51:51,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:51:51,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:51:51,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:51:51,282 INFO L87 Difference]: Start difference. First operand 2134 states and 8968 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-10-07 16:51:54,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:51:54,584 INFO L93 Difference]: Finished difference Result 3161 states and 12678 transitions. [2021-10-07 16:51:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 16:51:54,585 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 16 [2021-10-07 16:51:54,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:51:54,595 INFO L225 Difference]: With dead ends: 3161 [2021-10-07 16:51:54,595 INFO L226 Difference]: Without dead ends: 3161 [2021-10-07 16:51:54,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1047.8ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-10-07 16:51:54,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-10-07 16:51:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 2733. [2021-10-07 16:51:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2719 states have (on average 4.187936741449062) internal successors, (11387), 2732 states have internal predecessors, (11387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:51:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 11387 transitions. [2021-10-07 16:51:54,650 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 11387 transitions. Word has length 16 [2021-10-07 16:51:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:51:54,650 INFO L470 AbstractCegarLoop]: Abstraction has 2733 states and 11387 transitions. [2021-10-07 16:51:54,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-10-07 16:51:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 11387 transitions. [2021-10-07 16:51:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 16:51:54,652 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:51:54,652 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-07 16:51:54,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-07 16:51:54,852 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 [2021-10-07 16:51:54,853 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-07 16:51:54,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:51:54,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1004606438, now seen corresponding path program 3 times [2021-10-07 16:51:54,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:51:54,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156445484] [2021-10-07 16:51:54,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:51:54,855 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:51:54,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:51:54,856 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) [2021-10-07 16:51:54,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-07 16:51:55,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-07 16:51:55,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:51:55,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:51:55,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:51:55,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:51:55,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:51:55,794 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:51:55,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:51:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:51:56,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:52:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:52:02,507 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:52:02,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156445484] [2021-10-07 16:52:02,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156445484] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:52:02,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:52:02,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 16:52:02,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075760080] [2021-10-07 16:52:02,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 16:52:02,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:52:02,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 16:52:02,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:52:02,510 INFO L87 Difference]: Start difference. First operand 2733 states and 11387 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:52:15,597 WARN L207 SmtUtils]: Spent 9.95 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-07 16:52:24,164 WARN L207 SmtUtils]: Spent 7.55 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-07 16:52:31,572 WARN L207 SmtUtils]: Spent 6.39 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-07 16:52:38,094 WARN L207 SmtUtils]: Spent 5.11 s on a formula simplification that was a NOOP. DAG size: 136 Received shutdown request... [2021-10-07 16:53:09,109 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:53:09,114 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:53:10,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-07 16:53:10,310 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-07 16:53:10,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 [2021-10-07 16:53:10,325 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 16:53:10,326 WARN L594 AbstractCegarLoop]: Verification canceled: while executing Executor. [2021-10-07 16:53:10,327 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:53:10,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:53:10,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:53:10,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:53:10,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:53:10,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:53:10,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:53:10,329 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:53:10,329 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 16:53:10,329 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 16:53:10,329 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 16:53:10,329 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 16:53:10,329 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 16:53:10,329 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 16:53:10,330 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 16:53:10,330 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-07 16:53:10,330 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-07 16:53:10,330 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-07 16:53:10,330 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-07 16:53:10,330 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-07 16:53:10,331 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-07 16:53:10,331 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-07 16:53:10,331 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-07 16:53:10,332 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:53:10,332 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:53:10,332 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 16:53:10,332 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 16:53:10,332 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-07 16:53:10,332 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:53:10,332 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:53:10,333 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:53:10,333 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:53:10,333 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:53:10,333 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:53:10,333 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:53:10,333 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:53:10,342 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 16:53:10,342 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 16:53:10,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 04:53:10 BasicIcfg [2021-10-07 16:53:10,345 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 16:53:10,346 INFO L168 Benchmark]: Toolchain (without parser) took 811290.95 ms. Allocated memory was 164.6 MB in the beginning and 332.4 MB in the end (delta: 167.8 MB). Free memory was 117.5 MB in the beginning and 162.8 MB in the end (delta: -45.3 MB). Peak memory consumption was 123.5 MB. Max. memory is 8.0 GB. [2021-10-07 16:53:10,346 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 164.6 MB. Free memory is still 134.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 16:53:10,347 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.38 ms. Allocated memory is still 164.6 MB. Free memory was 117.0 MB in the beginning and 104.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:53:10,347 INFO L168 Benchmark]: Boogie Procedure Inliner took 121.65 ms. Allocated memory is still 164.6 MB. Free memory was 104.0 MB in the beginning and 146.8 MB in the end (delta: -42.9 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. [2021-10-07 16:53:10,347 INFO L168 Benchmark]: Boogie Preprocessor took 96.26 ms. Allocated memory is still 164.6 MB. Free memory was 146.8 MB in the beginning and 145.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-07 16:53:10,348 INFO L168 Benchmark]: RCFGBuilder took 985.65 ms. Allocated memory is still 164.6 MB. Free memory was 144.8 MB in the beginning and 125.4 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-10-07 16:53:10,348 INFO L168 Benchmark]: TraceAbstraction took 809696.81 ms. Allocated memory was 164.6 MB in the beginning and 332.4 MB in the end (delta: 167.8 MB). Free memory was 124.9 MB in the beginning and 162.8 MB in the end (delta: -37.9 MB). Peak memory consumption was 130.9 MB. Max. memory is 8.0 GB. [2021-10-07 16:53:10,352 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 164.6 MB. Free memory is still 134.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 372.38 ms. Allocated memory is still 164.6 MB. Free memory was 117.0 MB in the beginning and 104.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 121.65 ms. Allocated memory is still 164.6 MB. Free memory was 104.0 MB in the beginning and 146.8 MB in the end (delta: -42.9 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 96.26 ms. Allocated memory is still 164.6 MB. Free memory was 146.8 MB in the beginning and 145.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 985.65 ms. Allocated memory is still 164.6 MB. Free memory was 144.8 MB in the beginning and 125.4 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 809696.81 ms. Allocated memory was 164.6 MB in the beginning and 332.4 MB in the end (delta: 167.8 MB). Free memory was 124.9 MB in the beginning and 162.8 MB in the end (delta: -37.9 MB). Peak memory consumption was 130.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 26001.4ms, 192 PlacesBefore, 63 PlacesAfterwards, 198 TransitionsBefore, 59 TransitionsAfterwards, 3148 CoEnabledTransitionPairs, 7 FixpointIterations, 110 TrivialSequentialCompositions, 59 ConcurrentSequentialCompositions, 17 TrivialYvCompositions, 6 ConcurrentYvCompositions, 10 ChoiceCompositions, 202 TotalNumberOfCompositions, 5047 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3853, positive: 3764, positive conditional: 0, positive unconditional: 3764, negative: 89, negative conditional: 0, negative unconditional: 89, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1867, positive: 1841, positive conditional: 0, positive unconditional: 1841, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1867, positive: 1841, positive conditional: 0, positive unconditional: 1841, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 26, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2154, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 2154, negative conditional: 0, negative unconditional: 2154, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3853, positive: 1923, positive conditional: 0, positive unconditional: 1923, negative: 63, negative conditional: 0, negative unconditional: 63, unknown: 1867, unknown conditional: 0, unknown unconditional: 1867] , Statistics on independence cache: Total cache size (in pairs): 222, Positive cache size: 213, Positive conditional cache size: 0, Positive unconditional cache size: 213, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while executing Executor. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while executing Executor. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 229 locations, 37 error locations. Started 1 CEGAR loops. OverallTime: 809461.7ms, OverallIterations: 30, TraceHistogramMax: 14, EmptinessCheckTime: 50.9ms, AutomataDifference: 241904.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26160.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1428 SDtfs, 14007 SDslu, 8327 SDs, 0 SdLazy, 12769 SolverSat, 1083 SolverUnsat, 31 SolverUnknown, 0 SolverNotchecked, 133364.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 665 GetRequests, 226 SyntacticMatches, 7 SemanticMatches, 432 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 156458.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2733occurred in iteration=29, InterpolantAutomatonStates: 297, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2785.7ms AutomataMinimizationTime, 29 MinimizatonAttempts, 75300 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 272.1ms SsaConstructionTime, 2167.5ms SatisfiabilityAnalysisTime, 525338.2ms InterpolantComputationTime, 278 NumberOfCodeBlocks, 269 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 496 ConstructedInterpolants, 112 QuantifiedInterpolants, 14313 SizeOfPredicates, 203 NumberOfNonLiveVariables, 2646 ConjunctsInSsa, 348 ConjunctsInUnsatCore, 60 InterpolantComputations, 36 PerfectInterpolantSequences, 133/582 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