/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/unroll-cond-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 18:18:27,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 18:18:27,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 18:18:27,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-08 18:18:27,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-08 18:18:27,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-08 18:18:27,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-08 18:18:27,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-08 18:18:27,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-08 18:18:27,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-08 18:18:27,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-08 18:18:27,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-08 18:18:27,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-08 18:18:27,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-08 18:18:27,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-08 18:18:27,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-08 18:18:27,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-08 18:18:27,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-08 18:18:27,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-08 18:18:27,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-08 18:18:27,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-08 18:18:27,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-08 18:18:27,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-08 18:18:27,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-08 18:18:27,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-08 18:18:27,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-08 18:18:27,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-08 18:18:27,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-08 18:18:27,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-08 18:18:27,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-08 18:18:27,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-08 18:18:27,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-08 18:18:27,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-08 18:18:27,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-08 18:18:27,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-08 18:18:27,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-08 18:18:27,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-08 18:18:27,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-08 18:18:27,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 18:18:27,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 18:18:27,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 18:18:27,912 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-08 18:18:27,941 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 18:18:27,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 18:18:27,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 18:18:27,942 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 18:18:27,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 18:18:27,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 18:18:27,943 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 18:18:27,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 18:18:27,944 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 18:18:27,944 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-08 18:18:27,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 18:18:27,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 18:18:27,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 18:18:27,945 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-08 18:18:27,945 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-08 18:18:27,945 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-08 18:18:27,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 18:18:27,946 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-08 18:18:27,946 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-08 18:18:27,946 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-08 18:18:27,946 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 18:18:27,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 18:18:27,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 18:18:27,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 18:18:27,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 18:18:27,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 18:18:27,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 18:18:27,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 18:18:27,948 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-08 18:18:27,948 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-08 18:18:27,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 18:18:27,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-08 18:18:27,949 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-08 18:18:28,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 18:18:28,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 18:18:28,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 18:18:28,375 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 18:18:28,376 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 18:18:28,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2021-10-08 18:18:28,479 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a4f9de7a/771ddb37ad294510a999835c98ad4859/FLAG99ad26ba2 [2021-10-08 18:18:29,253 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 18:18:29,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2021-10-08 18:18:29,264 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a4f9de7a/771ddb37ad294510a999835c98ad4859/FLAG99ad26ba2 [2021-10-08 18:18:29,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a4f9de7a/771ddb37ad294510a999835c98ad4859 [2021-10-08 18:18:29,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 18:18:29,585 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-08 18:18:29,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 18:18:29,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 18:18:29,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 18:18:29,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 06:18:29" (1/1) ... [2021-10-08 18:18:29,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@111fe3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:18:29, skipping insertion in model container [2021-10-08 18:18:29,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 06:18:29" (1/1) ... [2021-10-08 18:18:29,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 18:18:29,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 18:18:29,887 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/unroll-cond-2.wvr.c[2566,2579] [2021-10-08 18:18:29,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 18:18:29,916 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-08 18:18:29,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 18:18:29,937 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/unroll-cond-2.wvr.c[2566,2579] [2021-10-08 18:18:29,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 18:18:29,948 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 18:18:29,976 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/unroll-cond-2.wvr.c[2566,2579] [2021-10-08 18:18:29,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 18:18:30,017 INFO L208 MainTranslator]: Completed translation [2021-10-08 18:18:30,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:18:30 WrapperNode [2021-10-08 18:18:30,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 18:18:30,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 18:18:30,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 18:18:30,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 18:18:30,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:18:30" (1/1) ... [2021-10-08 18:18:30,055 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:18:30" (1/1) ... [2021-10-08 18:18:30,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 18:18:30,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 18:18:30,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 18:18:30,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 18:18:30,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:18:30" (1/1) ... [2021-10-08 18:18:30,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:18:30" (1/1) ... [2021-10-08 18:18:30,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:18:30" (1/1) ... [2021-10-08 18:18:30,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:18:30" (1/1) ... [2021-10-08 18:18:30,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:18:30" (1/1) ... [2021-10-08 18:18:30,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:18:30" (1/1) ... [2021-10-08 18:18:30,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:18:30" (1/1) ... [2021-10-08 18:18:30,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 18:18:30,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 18:18:30,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 18:18:30,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 18:18:30,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:18:30" (1/1) ... [2021-10-08 18:18:30,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 18:18:30,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 18:18:30,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-08 18:18:30,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-08 18:18:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 18:18:30,256 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 18:18:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 18:18:30,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 18:18:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-08 18:18:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 18:18:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 18:18:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 18:18:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-08 18:18:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-08 18:18:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 18:18:30,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 18:18:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 18:18:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-08 18:18:30,263 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 18:18:31,691 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 18:18:31,692 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-10-08 18:18:31,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 06:18:31 BoogieIcfgContainer [2021-10-08 18:18:31,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 18:18:31,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 18:18:31,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 18:18:31,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 18:18:31,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 06:18:29" (1/3) ... [2021-10-08 18:18:31,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7326e21d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 06:18:31, skipping insertion in model container [2021-10-08 18:18:31,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 06:18:30" (2/3) ... [2021-10-08 18:18:31,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7326e21d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 06:18:31, skipping insertion in model container [2021-10-08 18:18:31,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 06:18:31" (3/3) ... [2021-10-08 18:18:31,707 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2021-10-08 18:18:31,719 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 18:18:31,719 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-08 18:18:31,720 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 18:18:31,762 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,763 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,763 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,763 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,764 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,764 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,764 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,765 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,765 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,765 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,766 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,766 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,768 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,768 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,768 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,768 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,769 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,769 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,769 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,769 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,770 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,770 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,770 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,770 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,771 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,771 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,771 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,772 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,772 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,772 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,773 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,773 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,773 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,773 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,774 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,774 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,774 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,775 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,775 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,775 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,776 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,776 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,777 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,777 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,777 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,777 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,778 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,778 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,778 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,778 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,779 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,779 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,779 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,779 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,780 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,780 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,780 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,780 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,781 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,781 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,781 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,781 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,782 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,782 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,782 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,783 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,783 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,783 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,788 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,788 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,788 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,789 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,789 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,789 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,792 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,792 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,792 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,793 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,793 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,793 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,793 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,794 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,794 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,794 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 18:18:31,802 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-08 18:18:31,863 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 18:18:31,872 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-08 18:18:31,872 INFO L340 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2021-10-08 18:18:31,893 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 18:18:31,910 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 143 transitions, 302 flow [2021-10-08 18:18:31,915 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 143 transitions, 302 flow [2021-10-08 18:18:31,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 138 places, 143 transitions, 302 flow [2021-10-08 18:18:32,025 INFO L129 PetriNetUnfolder]: 12/141 cut-off events. [2021-10-08 18:18:32,032 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-08 18:18:32,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 141 events. 12/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 158 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2021-10-08 18:18:32,077 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2021-10-08 18:18:52,357 INFO L131 LiptonReduction]: Checked pairs total: 1458 [2021-10-08 18:18:52,357 INFO L133 LiptonReduction]: Total number of compositions: 161 [2021-10-08 18:18:52,367 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 37 transitions, 90 flow [2021-10-08 18:18:52,390 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 186 states, 98 states have (on average 4.683673469387755) internal successors, (459), 185 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 98 states have (on average 4.683673469387755) internal successors, (459), 185 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:52,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 18:18:52,399 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:18:52,400 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 18:18:52,401 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:18:52,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:18:52,407 INFO L82 PathProgramCache]: Analyzing trace with hash 20658, now seen corresponding path program 1 times [2021-10-08 18:18:52,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:18:52,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172988623] [2021-10-08 18:18:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:18:52,422 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:18:52,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:18:52,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:18:52,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-08 18:18:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:18:52,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 18:18:52,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:18:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:18:52,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:18:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:18:52,698 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:18:52,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172988623] [2021-10-08 18:18:52,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172988623] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:18:52,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:18:52,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:18:52,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510140507] [2021-10-08 18:18:52,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:18:52,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:18:52,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:18:52,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:18:52,770 INFO L87 Difference]: Start difference. First operand has 186 states, 98 states have (on average 4.683673469387755) internal successors, (459), 185 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:18:52,881 INFO L93 Difference]: Finished difference Result 168 states and 409 transitions. [2021-10-08 18:18:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:18:52,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 18:18:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:18:52,899 INFO L225 Difference]: With dead ends: 168 [2021-10-08 18:18:52,900 INFO L226 Difference]: Without dead ends: 168 [2021-10-08 18:18:52,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:18:52,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-08 18:18:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2021-10-08 18:18:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 90 states have (on average 4.544444444444444) internal successors, (409), 165 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:52,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 409 transitions. [2021-10-08 18:18:52,982 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 409 transitions. Word has length 2 [2021-10-08 18:18:52,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:18:52,983 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 409 transitions. [2021-10-08 18:18:52,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 409 transitions. [2021-10-08 18:18:52,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 18:18:52,984 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:18:52,984 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 18:18:53,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-08 18:18:53,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:18:53,200 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:18:53,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:18:53,201 INFO L82 PathProgramCache]: Analyzing trace with hash 20518, now seen corresponding path program 1 times [2021-10-08 18:18:53,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:18:53,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686574982] [2021-10-08 18:18:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:18:53,207 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:18:53,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:18:53,210 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:18:53,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-08 18:18:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:18:53,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 18:18:53,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:18:53,335 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-08 18:18:53,337 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 2 case distinctions, treesize of input 12 treesize of output 22 [2021-10-08 18:18:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:18:53,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:18:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:18:53,371 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:18:53,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686574982] [2021-10-08 18:18:53,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686574982] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:18:53,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:18:53,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 18:18:53,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081050899] [2021-10-08 18:18:53,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 18:18:53,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:18:53,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 18:18:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:18:53,376 INFO L87 Difference]: Start difference. First operand 166 states and 409 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:53,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:18:53,533 INFO L93 Difference]: Finished difference Result 165 states and 407 transitions. [2021-10-08 18:18:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:18:53,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 18:18:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:18:53,537 INFO L225 Difference]: With dead ends: 165 [2021-10-08 18:18:53,537 INFO L226 Difference]: Without dead ends: 165 [2021-10-08 18:18:53,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:18:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-08 18:18:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-10-08 18:18:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 90 states have (on average 4.522222222222222) internal successors, (407), 164 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 407 transitions. [2021-10-08 18:18:53,558 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 407 transitions. Word has length 2 [2021-10-08 18:18:53,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:18:53,559 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 407 transitions. [2021-10-08 18:18:53,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 407 transitions. [2021-10-08 18:18:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 18:18:53,560 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:18:53,560 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 18:18:53,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-08 18:18:53,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:18:53,778 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:18:53,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:18:53,779 INFO L82 PathProgramCache]: Analyzing trace with hash 20519, now seen corresponding path program 1 times [2021-10-08 18:18:53,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:18:53,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044958738] [2021-10-08 18:18:53,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:18:53,781 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:18:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:18:53,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:18:53,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-08 18:18:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:18:53,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 18:18:53,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:18:54,087 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:18:54,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 65 [2021-10-08 18:18:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:18:54,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:18:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:18:54,340 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:18:54,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044958738] [2021-10-08 18:18:54,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044958738] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:18:54,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:18:54,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:18:54,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298187843] [2021-10-08 18:18:54,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:18:54,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:18:54,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:18:54,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:18:54,346 INFO L87 Difference]: Start difference. First operand 165 states and 407 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:18:54,712 INFO L93 Difference]: Finished difference Result 165 states and 406 transitions. [2021-10-08 18:18:54,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:18:54,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-08 18:18:54,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:18:54,717 INFO L225 Difference]: With dead ends: 165 [2021-10-08 18:18:54,718 INFO L226 Difference]: Without dead ends: 165 [2021-10-08 18:18:54,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:18:54,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-08 18:18:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-10-08 18:18:54,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 90 states have (on average 4.511111111111111) internal successors, (406), 164 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 406 transitions. [2021-10-08 18:18:54,736 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 406 transitions. Word has length 2 [2021-10-08 18:18:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:18:54,736 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 406 transitions. [2021-10-08 18:18:54,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 406 transitions. [2021-10-08 18:18:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 18:18:54,737 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:18:54,737 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 18:18:54,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-08 18:18:54,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:18:54,952 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:18:54,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:18:54,953 INFO L82 PathProgramCache]: Analyzing trace with hash 640534, now seen corresponding path program 1 times [2021-10-08 18:18:54,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:18:54,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563825392] [2021-10-08 18:18:54,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:18:54,955 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:18:54,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:18:54,957 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:18:54,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-08 18:18:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:18:55,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 18:18:55,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:18:55,088 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-08 18:18:55,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 31 [2021-10-08 18:18:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:18:55,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:18:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:18:55,192 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:18:55,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563825392] [2021-10-08 18:18:55,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563825392] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:18:55,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:18:55,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:18:55,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947765877] [2021-10-08 18:18:55,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:18:55,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:18:55,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:18:55,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:18:55,196 INFO L87 Difference]: Start difference. First operand 165 states and 406 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:55,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:18:55,337 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2021-10-08 18:18:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:18:55,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-08 18:18:55,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:18:55,343 INFO L225 Difference]: With dead ends: 136 [2021-10-08 18:18:55,343 INFO L226 Difference]: Without dead ends: 136 [2021-10-08 18:18:55,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:18:55,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-08 18:18:55,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-10-08 18:18:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 80 states have (on average 4.0125) internal successors, (321), 135 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:55,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 321 transitions. [2021-10-08 18:18:55,371 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 321 transitions. Word has length 3 [2021-10-08 18:18:55,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:18:55,378 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 321 transitions. [2021-10-08 18:18:55,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 321 transitions. [2021-10-08 18:18:55,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 18:18:55,379 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:18:55,379 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 18:18:55,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-08 18:18:55,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:18:55,580 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:18:55,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:18:55,581 INFO L82 PathProgramCache]: Analyzing trace with hash 640535, now seen corresponding path program 1 times [2021-10-08 18:18:55,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:18:55,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232798886] [2021-10-08 18:18:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:18:55,583 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:18:55,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:18:55,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:18:55,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-08 18:18:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:18:55,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 18:18:55,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:18:55,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:18:55,898 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:18:55,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 69 [2021-10-08 18:18:55,906 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 70 treesize of output 68 [2021-10-08 18:18:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:18:56,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:18:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:18:56,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:18:56,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232798886] [2021-10-08 18:18:56,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232798886] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:18:56,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:18:56,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-08 18:18:56,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358680844] [2021-10-08 18:18:56,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 18:18:56,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:18:56,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 18:18:56,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-08 18:18:56,744 INFO L87 Difference]: Start difference. First operand 136 states and 321 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:18:57,669 INFO L93 Difference]: Finished difference Result 244 states and 561 transitions. [2021-10-08 18:18:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 18:18:57,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-08 18:18:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:18:57,673 INFO L225 Difference]: With dead ends: 244 [2021-10-08 18:18:57,673 INFO L226 Difference]: Without dead ends: 244 [2021-10-08 18:18:57,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:18:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-08 18:18:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 176. [2021-10-08 18:18:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 120 states have (on average 3.658333333333333) internal successors, (439), 175 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:57,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 439 transitions. [2021-10-08 18:18:57,686 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 439 transitions. Word has length 3 [2021-10-08 18:18:57,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:18:57,686 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 439 transitions. [2021-10-08 18:18:57,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:57,686 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 439 transitions. [2021-10-08 18:18:57,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 18:18:57,687 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:18:57,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 18:18:57,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-08 18:18:57,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:18:57,899 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:18:57,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:18:57,901 INFO L82 PathProgramCache]: Analyzing trace with hash 640395, now seen corresponding path program 1 times [2021-10-08 18:18:57,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:18:57,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721765353] [2021-10-08 18:18:57,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:18:57,902 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:18:57,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:18:57,903 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:18:57,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-08 18:18:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:18:57,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 18:18:57,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:18:57,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:18:58,164 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:18:58,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:18:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:18:58,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:18:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:18:58,621 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:18:58,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721765353] [2021-10-08 18:18:58,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721765353] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:18:58,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:18:58,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-08 18:18:58,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117968844] [2021-10-08 18:18:58,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 18:18:58,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:18:58,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 18:18:58,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-08 18:18:58,627 INFO L87 Difference]: Start difference. First operand 176 states and 439 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:18:59,267 INFO L93 Difference]: Finished difference Result 242 states and 558 transitions. [2021-10-08 18:18:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-08 18:18:59,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-08 18:18:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:18:59,276 INFO L225 Difference]: With dead ends: 242 [2021-10-08 18:18:59,277 INFO L226 Difference]: Without dead ends: 242 [2021-10-08 18:18:59,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 398.2ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-08 18:18:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-08 18:18:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 176. [2021-10-08 18:18:59,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 120 states have (on average 3.6333333333333333) internal successors, (436), 175 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 436 transitions. [2021-10-08 18:18:59,289 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 436 transitions. Word has length 3 [2021-10-08 18:18:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:18:59,290 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 436 transitions. [2021-10-08 18:18:59,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:59,294 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 436 transitions. [2021-10-08 18:18:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 18:18:59,295 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:18:59,295 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 18:18:59,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-08 18:18:59,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:18:59,503 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:18:59,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:18:59,504 INFO L82 PathProgramCache]: Analyzing trace with hash 615569573, now seen corresponding path program 1 times [2021-10-08 18:18:59,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:18:59,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561476679] [2021-10-08 18:18:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:18:59,506 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:18:59,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:18:59,507 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:18:59,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-08 18:18:59,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:18:59,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 18:18:59,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:18:59,605 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-08 18:18:59,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2021-10-08 18:18:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:18:59,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:18:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:18:59,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:18:59,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561476679] [2021-10-08 18:18:59,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561476679] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:18:59,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:18:59,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-08 18:18:59,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381265991] [2021-10-08 18:18:59,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:18:59,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:18:59,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:18:59,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:18:59,679 INFO L87 Difference]: Start difference. First operand 176 states and 436 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:18:59,879 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2021-10-08 18:18:59,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:18:59,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-08 18:18:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:18:59,884 INFO L225 Difference]: With dead ends: 110 [2021-10-08 18:18:59,884 INFO L226 Difference]: Without dead ends: 110 [2021-10-08 18:18:59,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-08 18:18:59,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-08 18:18:59,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-10-08 18:18:59,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 80 states have (on average 3.2875) internal successors, (263), 109 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 263 transitions. [2021-10-08 18:18:59,892 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 263 transitions. Word has length 5 [2021-10-08 18:18:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:18:59,893 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 263 transitions. [2021-10-08 18:18:59,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:18:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 263 transitions. [2021-10-08 18:18:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 18:18:59,894 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:18:59,894 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 18:18:59,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-08 18:19:00,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:19:00,096 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:19:00,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:19:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash 615569574, now seen corresponding path program 1 times [2021-10-08 18:19:00,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:19:00,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017455572] [2021-10-08 18:19:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:19:00,098 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:19:00,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:19:00,099 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:19:00,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-08 18:19:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:19:00,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 18:19:00,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:19:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:00,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:19:00,516 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 [2021-10-08 18:19:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:00,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:19:00,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017455572] [2021-10-08 18:19:00,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017455572] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:19:00,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:19:00,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 18:19:00,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940032238] [2021-10-08 18:19:00,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:19:00,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:19:00,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:19:00,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:19:00,694 INFO L87 Difference]: Start difference. First operand 110 states and 263 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:01,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:19:01,384 INFO L93 Difference]: Finished difference Result 220 states and 509 transitions. [2021-10-08 18:19:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 18:19:01,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-08 18:19:01,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:19:01,386 INFO L225 Difference]: With dead ends: 220 [2021-10-08 18:19:01,387 INFO L226 Difference]: Without dead ends: 220 [2021-10-08 18:19:01,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 400.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-08 18:19:01,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-10-08 18:19:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 136. [2021-10-08 18:19:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 106 states have (on average 3.3773584905660377) internal successors, (358), 135 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 358 transitions. [2021-10-08 18:19:01,394 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 358 transitions. Word has length 5 [2021-10-08 18:19:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:19:01,394 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 358 transitions. [2021-10-08 18:19:01,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:01,395 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 358 transitions. [2021-10-08 18:19:01,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 18:19:01,395 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:19:01,395 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 18:19:01,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-08 18:19:01,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:19:01,610 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:19:01,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:19:01,611 INFO L82 PathProgramCache]: Analyzing trace with hash 615569664, now seen corresponding path program 1 times [2021-10-08 18:19:01,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:19:01,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839443836] [2021-10-08 18:19:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:19:01,613 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:19:01,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:19:01,614 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:19:01,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-08 18:19:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:19:01,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 18:19:01,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:19:01,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:19:01,955 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:19:01,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:19:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:02,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:19:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:02,532 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:19:02,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839443836] [2021-10-08 18:19:02,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839443836] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:19:02,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:19:02,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 18:19:02,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572755283] [2021-10-08 18:19:02,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:19:02,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:19:02,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:19:02,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:19:02,535 INFO L87 Difference]: Start difference. First operand 136 states and 358 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:19:03,022 INFO L93 Difference]: Finished difference Result 168 states and 417 transitions. [2021-10-08 18:19:03,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 18:19:03,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-08 18:19:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:19:03,028 INFO L225 Difference]: With dead ends: 168 [2021-10-08 18:19:03,028 INFO L226 Difference]: Without dead ends: 168 [2021-10-08 18:19:03,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-08 18:19:03,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-08 18:19:03,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 127. [2021-10-08 18:19:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 103 states have (on average 3.2524271844660193) internal successors, (335), 126 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:03,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 335 transitions. [2021-10-08 18:19:03,041 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 335 transitions. Word has length 5 [2021-10-08 18:19:03,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:19:03,041 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 335 transitions. [2021-10-08 18:19:03,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:03,042 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 335 transitions. [2021-10-08 18:19:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 18:19:03,043 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:19:03,043 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 18:19:03,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-08 18:19:03,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:19:03,257 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:19:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:19:03,257 INFO L82 PathProgramCache]: Analyzing trace with hash 615569666, now seen corresponding path program 1 times [2021-10-08 18:19:03,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:19:03,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933867803] [2021-10-08 18:19:03,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:19:03,259 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:19:03,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:19:03,261 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:19:03,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-08 18:19:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:19:03,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 18:19:03,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:19:03,392 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-08 18:19:03,392 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 2 case distinctions, treesize of input 12 treesize of output 22 [2021-10-08 18:19:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:19:03,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:19:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 18:19:03,438 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:19:03,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933867803] [2021-10-08 18:19:03,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933867803] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:19:03,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:19:03,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 18:19:03,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691292716] [2021-10-08 18:19:03,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 18:19:03,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:19:03,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 18:19:03,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:19:03,441 INFO L87 Difference]: Start difference. First operand 127 states and 335 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:03,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:19:03,522 INFO L93 Difference]: Finished difference Result 118 states and 312 transitions. [2021-10-08 18:19:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:19:03,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-08 18:19:03,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:19:03,524 INFO L225 Difference]: With dead ends: 118 [2021-10-08 18:19:03,525 INFO L226 Difference]: Without dead ends: 118 [2021-10-08 18:19:03,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 18:19:03,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-08 18:19:03,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-10-08 18:19:03,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 100 states have (on average 3.12) internal successors, (312), 117 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 312 transitions. [2021-10-08 18:19:03,532 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 312 transitions. Word has length 5 [2021-10-08 18:19:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:19:03,532 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 312 transitions. [2021-10-08 18:19:03,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:03,532 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 312 transitions. [2021-10-08 18:19:03,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 18:19:03,533 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:19:03,533 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1] [2021-10-08 18:19:03,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-08 18:19:03,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:19:03,747 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:19:03,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:19:03,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1902414259, now seen corresponding path program 2 times [2021-10-08 18:19:03,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:19:03,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228143973] [2021-10-08 18:19:03,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:19:03,749 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:19:03,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:19:03,751 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:19:03,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-08 18:19:03,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 18:19:03,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:19:03,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 18:19:03,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:19:04,039 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:19:04,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 75 [2021-10-08 18:19:04,046 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 76 treesize of output 74 [2021-10-08 18:19:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 18:19:05,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:19:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 18:19:05,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:19:05,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228143973] [2021-10-08 18:19:05,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228143973] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:19:05,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:19:05,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 18:19:05,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770586641] [2021-10-08 18:19:05,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 18:19:05,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:19:05,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 18:19:05,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:19:05,879 INFO L87 Difference]: Start difference. First operand 118 states and 312 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:06,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:19:06,031 INFO L93 Difference]: Finished difference Result 97 states and 246 transitions. [2021-10-08 18:19:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 18:19:06,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-08 18:19:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:19:06,033 INFO L225 Difference]: With dead ends: 97 [2021-10-08 18:19:06,033 INFO L226 Difference]: Without dead ends: 97 [2021-10-08 18:19:06,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 18:19:06,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-08 18:19:06,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2021-10-08 18:19:06,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 59 states have (on average 2.7457627118644066) internal successors, (162), 67 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 162 transitions. [2021-10-08 18:19:06,045 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 162 transitions. Word has length 6 [2021-10-08 18:19:06,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:19:06,045 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 162 transitions. [2021-10-08 18:19:06,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:06,046 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 162 transitions. [2021-10-08 18:19:06,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 18:19:06,046 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:19:06,046 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1] [2021-10-08 18:19:06,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-08 18:19:06,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:19:06,259 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:19:06,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:19:06,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1902414119, now seen corresponding path program 2 times [2021-10-08 18:19:06,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:19:06,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061149519] [2021-10-08 18:19:06,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:19:06,262 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:19:06,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:19:06,264 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:19:06,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-08 18:19:06,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 18:19:06,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:19:06,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-08 18:19:06,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:19:06,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:19:06,538 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:19:06,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:19:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:06,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:19:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:07,864 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:19:07,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061149519] [2021-10-08 18:19:07,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061149519] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:19:07,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:19:07,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-08 18:19:07,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883036987] [2021-10-08 18:19:07,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 18:19:07,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:19:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 18:19:07,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-08 18:19:07,866 INFO L87 Difference]: Start difference. First operand 68 states and 162 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:11,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:19:11,667 INFO L93 Difference]: Finished difference Result 562 states and 1382 transitions. [2021-10-08 18:19:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-08 18:19:11,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-08 18:19:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:19:11,675 INFO L225 Difference]: With dead ends: 562 [2021-10-08 18:19:11,675 INFO L226 Difference]: Without dead ends: 562 [2021-10-08 18:19:11,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2390.5ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-10-08 18:19:11,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-10-08 18:19:11,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 74. [2021-10-08 18:19:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 2.6769230769230767) internal successors, (174), 73 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 174 transitions. [2021-10-08 18:19:11,685 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 174 transitions. Word has length 6 [2021-10-08 18:19:11,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:19:11,685 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 174 transitions. [2021-10-08 18:19:11,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 174 transitions. [2021-10-08 18:19:11,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 18:19:11,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:19:11,686 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-08 18:19:11,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-08 18:19:11,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:19:11,899 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:19:11,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:19:11,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1902788138, now seen corresponding path program 1 times [2021-10-08 18:19:11,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:19:11,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284271443] [2021-10-08 18:19:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:19:11,901 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:19:11,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:19:11,902 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:19:11,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-08 18:19:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:19:12,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 18:19:12,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:19:12,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:19:12,202 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:19:12,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:19:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:12,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:19:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:13,328 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:19:13,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284271443] [2021-10-08 18:19:13,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284271443] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:19:13,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:19:13,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 18:19:13,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937056006] [2021-10-08 18:19:13,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 18:19:13,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:19:13,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 18:19:13,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-08 18:19:13,331 INFO L87 Difference]: Start difference. First operand 74 states and 174 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:17,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:19:17,733 INFO L93 Difference]: Finished difference Result 196 states and 440 transitions. [2021-10-08 18:19:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-08 18:19:17,735 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-08 18:19:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:19:17,737 INFO L225 Difference]: With dead ends: 196 [2021-10-08 18:19:17,738 INFO L226 Difference]: Without dead ends: 196 [2021-10-08 18:19:17,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2719.4ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-08 18:19:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-08 18:19:17,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 91. [2021-10-08 18:19:17,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 82 states have (on average 2.8048780487804876) internal successors, (230), 90 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:17,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 230 transitions. [2021-10-08 18:19:17,743 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 230 transitions. Word has length 6 [2021-10-08 18:19:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:19:17,744 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 230 transitions. [2021-10-08 18:19:17,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:17,744 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 230 transitions. [2021-10-08 18:19:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 18:19:17,745 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:19:17,745 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:19:17,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-08 18:19:17,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:19:17,953 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:19:17,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:19:17,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1143024189, now seen corresponding path program 1 times [2021-10-08 18:19:17,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:19:17,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110055801] [2021-10-08 18:19:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:19:17,955 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:19:17,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:19:17,956 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:19:17,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-08 18:19:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:19:18,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 18:19:18,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:19:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:18,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:19:18,476 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 [2021-10-08 18:19:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:18,605 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:19:18,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110055801] [2021-10-08 18:19:18,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110055801] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:19:18,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:19:18,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 18:19:18,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272050387] [2021-10-08 18:19:18,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:19:18,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:19:18,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:19:18,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:19:18,607 INFO L87 Difference]: Start difference. First operand 91 states and 230 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:19,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:19:19,139 INFO L93 Difference]: Finished difference Result 118 states and 325 transitions. [2021-10-08 18:19:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 18:19:19,139 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-08 18:19:19,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:19:19,145 INFO L225 Difference]: With dead ends: 118 [2021-10-08 18:19:19,145 INFO L226 Difference]: Without dead ends: 118 [2021-10-08 18:19:19,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-08 18:19:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-08 18:19:19,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 107. [2021-10-08 18:19:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 98 states have (on average 3.020408163265306) internal successors, (296), 106 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 296 transitions. [2021-10-08 18:19:19,153 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 296 transitions. Word has length 7 [2021-10-08 18:19:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:19:19,154 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 296 transitions. [2021-10-08 18:19:19,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 296 transitions. [2021-10-08 18:19:19,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 18:19:19,156 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:19:19,156 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:19:19,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-08 18:19:19,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:19:19,368 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:19:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:19:19,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1074012335, now seen corresponding path program 1 times [2021-10-08 18:19:19,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:19:19,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022498872] [2021-10-08 18:19:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:19:19,370 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:19:19,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:19:19,371 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:19:19,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-08 18:19:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:19:19,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 18:19:19,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:19:19,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:19:19,705 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:19:19,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:19:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:20,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:19:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:21,219 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:19:21,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022498872] [2021-10-08 18:19:21,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022498872] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:19:21,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:19:21,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 18:19:21,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149372067] [2021-10-08 18:19:21,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 18:19:21,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:19:21,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 18:19:21,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-08 18:19:21,221 INFO L87 Difference]: Start difference. First operand 107 states and 296 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:19:25,224 INFO L93 Difference]: Finished difference Result 150 states and 358 transitions. [2021-10-08 18:19:25,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-08 18:19:25,226 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-08 18:19:25,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:19:25,227 INFO L225 Difference]: With dead ends: 150 [2021-10-08 18:19:25,228 INFO L226 Difference]: Without dead ends: 150 [2021-10-08 18:19:25,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2915.4ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-08 18:19:25,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-08 18:19:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 97. [2021-10-08 18:19:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 2.8863636363636362) internal successors, (254), 96 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:25,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 254 transitions. [2021-10-08 18:19:25,234 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 254 transitions. Word has length 8 [2021-10-08 18:19:25,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:19:25,234 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 254 transitions. [2021-10-08 18:19:25,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:25,235 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 254 transitions. [2021-10-08 18:19:25,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 18:19:25,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:19:25,235 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-10-08 18:19:25,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-08 18:19:25,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:19:25,442 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:19:25,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:19:25,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1564769010, now seen corresponding path program 2 times [2021-10-08 18:19:25,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:19:25,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055770732] [2021-10-08 18:19:25,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:19:25,444 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:19:25,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:19:25,446 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:19:25,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-08 18:19:25,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 18:19:25,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:19:25,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-08 18:19:25,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:19:25,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:19:25,789 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:19:25,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:19:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:26,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:19:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:28,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:19:28,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055770732] [2021-10-08 18:19:28,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055770732] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:19:28,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:19:28,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 18:19:28,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121988631] [2021-10-08 18:19:28,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 18:19:28,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:19:28,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 18:19:28,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-08 18:19:28,280 INFO L87 Difference]: Start difference. First operand 97 states and 254 transitions. Second operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:42,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:19:42,738 INFO L93 Difference]: Finished difference Result 341 states and 797 transitions. [2021-10-08 18:19:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-08 18:19:42,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-08 18:19:42,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:19:42,743 INFO L225 Difference]: With dead ends: 341 [2021-10-08 18:19:42,743 INFO L226 Difference]: Without dead ends: 341 [2021-10-08 18:19:42,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 8776.1ms TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2021-10-08 18:19:42,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-10-08 18:19:42,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 118. [2021-10-08 18:19:42,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 109 states have (on average 2.981651376146789) internal successors, (325), 117 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 325 transitions. [2021-10-08 18:19:42,752 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 325 transitions. Word has length 9 [2021-10-08 18:19:42,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:19:42,753 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 325 transitions. [2021-10-08 18:19:42,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:19:42,753 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 325 transitions. [2021-10-08 18:19:42,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 18:19:42,754 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:19:42,754 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:19:42,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-08 18:19:42,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:19:42,967 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:19:42,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:19:42,968 INFO L82 PathProgramCache]: Analyzing trace with hash -501809867, now seen corresponding path program 2 times [2021-10-08 18:19:42,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:19:42,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325961912] [2021-10-08 18:19:42,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:19:42,970 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:19:42,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:19:42,971 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:19:42,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-08 18:19:43,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 18:19:43,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:19:43,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-08 18:19:43,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:19:43,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:19:43,399 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:19:43,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:19:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:43,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:19:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:19:46,534 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:19:46,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325961912] [2021-10-08 18:19:46,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325961912] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:19:46,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:19:46,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 18:19:46,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659975955] [2021-10-08 18:19:46,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 18:19:46,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:19:46,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 18:19:46,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-08 18:19:46,536 INFO L87 Difference]: Start difference. First operand 118 states and 325 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:20:00,688 INFO L93 Difference]: Finished difference Result 249 states and 565 transitions. [2021-10-08 18:20:00,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-08 18:20:00,690 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 18:20:00,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:20:00,692 INFO L225 Difference]: With dead ends: 249 [2021-10-08 18:20:00,693 INFO L226 Difference]: Without dead ends: 249 [2021-10-08 18:20:00,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 8743.8ms TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2021-10-08 18:20:00,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-10-08 18:20:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 97. [2021-10-08 18:20:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 2.8863636363636362) internal successors, (254), 96 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 254 transitions. [2021-10-08 18:20:00,704 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 254 transitions. Word has length 11 [2021-10-08 18:20:00,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:20:00,705 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 254 transitions. [2021-10-08 18:20:00,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:00,705 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 254 transitions. [2021-10-08 18:20:00,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 18:20:00,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:20:00,708 INFO L512 BasicCegarLoop]: trace histogram [10, 1, 1] [2021-10-08 18:20:00,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-08 18:20:00,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:20:00,921 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:20:00,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:20:00,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1006735705, now seen corresponding path program 3 times [2021-10-08 18:20:00,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:20:00,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083858353] [2021-10-08 18:20:00,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 18:20:00,923 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:20:00,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:20:00,925 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:20:00,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-08 18:20:01,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-08 18:20:01,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:20:01,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 18:20:01,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:20:01,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:20:01,395 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:20:01,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:20:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:20:02,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:20:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:20:06,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:20:06,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083858353] [2021-10-08 18:20:06,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083858353] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:20:06,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:20:06,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-08 18:20:06,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467564701] [2021-10-08 18:20:06,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-08 18:20:06,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:20:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-08 18:20:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-10-08 18:20:06,452 INFO L87 Difference]: Start difference. First operand 97 states and 254 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:32,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:20:32,561 INFO L93 Difference]: Finished difference Result 1048 states and 2762 transitions. [2021-10-08 18:20:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-08 18:20:32,563 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 18:20:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:20:32,573 INFO L225 Difference]: With dead ends: 1048 [2021-10-08 18:20:32,573 INFO L226 Difference]: Without dead ends: 1048 [2021-10-08 18:20:32,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 21759.1ms TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2021-10-08 18:20:32,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-10-08 18:20:32,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 109. [2021-10-08 18:20:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 100 states have (on average 2.78) internal successors, (278), 108 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 278 transitions. [2021-10-08 18:20:32,589 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 278 transitions. Word has length 12 [2021-10-08 18:20:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:20:32,589 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 278 transitions. [2021-10-08 18:20:32,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 278 transitions. [2021-10-08 18:20:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 18:20:32,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:20:32,591 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:20:32,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-08 18:20:32,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:20:32,805 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:20:32,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:20:32,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1648637234, now seen corresponding path program 1 times [2021-10-08 18:20:32,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:20:32,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925267137] [2021-10-08 18:20:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:20:32,808 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:20:32,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:20:32,809 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:20:32,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-08 18:20:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:20:33,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 18:20:33,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:20:33,267 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-08 18:20:33,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 109 [2021-10-08 18:20:33,271 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 109 treesize of output 107 [2021-10-08 18:20:33,276 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 107 treesize of output 105 [2021-10-08 18:20:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:20:33,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:20:33,516 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-08 18:20:33,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 146 [2021-10-08 18:20:33,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 144 [2021-10-08 18:20:33,530 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 144 treesize of output 142 [2021-10-08 18:20:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:20:34,182 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:20:34,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925267137] [2021-10-08 18:20:34,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925267137] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:20:34,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:20:34,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 18:20:34,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074535976] [2021-10-08 18:20:34,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 18:20:34,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:20:34,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 18:20:34,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-08 18:20:34,184 INFO L87 Difference]: Start difference. First operand 109 states and 278 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:34,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:20:34,638 INFO L93 Difference]: Finished difference Result 143 states and 361 transitions. [2021-10-08 18:20:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 18:20:34,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-08 18:20:34,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:20:34,640 INFO L225 Difference]: With dead ends: 143 [2021-10-08 18:20:34,640 INFO L226 Difference]: Without dead ends: 125 [2021-10-08 18:20:34,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-10-08 18:20:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-08 18:20:34,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 109. [2021-10-08 18:20:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 100 states have (on average 2.77) internal successors, (277), 108 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 277 transitions. [2021-10-08 18:20:34,645 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 277 transitions. Word has length 13 [2021-10-08 18:20:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:20:34,646 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 277 transitions. [2021-10-08 18:20:34,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:34,646 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 277 transitions. [2021-10-08 18:20:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-08 18:20:34,647 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:20:34,647 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:20:34,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-08 18:20:34,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:20:34,860 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:20:34,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:20:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1609838870, now seen corresponding path program 2 times [2021-10-08 18:20:34,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:20:34,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930298513] [2021-10-08 18:20:34,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 18:20:34,862 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:20:34,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:20:34,865 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:20:34,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-08 18:20:35,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 18:20:35,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:20:35,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 18:20:35,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:20:35,232 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-08 18:20:35,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 106 [2021-10-08 18:20:35,237 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 106 treesize of output 104 [2021-10-08 18:20:35,242 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 104 treesize of output 102 [2021-10-08 18:20:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 18:20:35,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:20:35,436 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-08 18:20:35,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 146 [2021-10-08 18:20:35,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 144 [2021-10-08 18:20:35,452 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 144 treesize of output 142 [2021-10-08 18:20:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 18:20:36,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:20:36,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930298513] [2021-10-08 18:20:36,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930298513] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:20:36,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:20:36,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-08 18:20:36,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271589172] [2021-10-08 18:20:36,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:20:36,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:20:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:20:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:20:36,466 INFO L87 Difference]: Start difference. First operand 109 states and 277 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:20:36,714 INFO L93 Difference]: Finished difference Result 130 states and 326 transitions. [2021-10-08 18:20:36,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 18:20:36,717 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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 14 [2021-10-08 18:20:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:20:36,719 INFO L225 Difference]: With dead ends: 130 [2021-10-08 18:20:36,719 INFO L226 Difference]: Without dead ends: 125 [2021-10-08 18:20:36,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 458.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-08 18:20:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-08 18:20:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-10-08 18:20:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 116 states have (on average 2.706896551724138) internal successors, (314), 124 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 314 transitions. [2021-10-08 18:20:36,725 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 314 transitions. Word has length 14 [2021-10-08 18:20:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:20:36,725 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 314 transitions. [2021-10-08 18:20:36,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 314 transitions. [2021-10-08 18:20:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-08 18:20:36,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:20:36,726 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:20:36,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-08 18:20:36,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:20:36,940 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:20:36,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:20:36,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1597695300, now seen corresponding path program 3 times [2021-10-08 18:20:36,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:20:36,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172391617] [2021-10-08 18:20:36,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 18:20:36,942 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:20:36,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:20:36,944 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:20:36,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-08 18:20:37,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-08 18:20:37,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:20:37,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 18:20:37,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:20:37,342 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-08 18:20:37,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 30 [2021-10-08 18:20:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 18:20:39,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:20:39,722 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-08 18:20:39,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 184 treesize of output 149 [2021-10-08 18:20:39,729 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 149 treesize of output 147 [2021-10-08 18:20:39,735 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 147 treesize of output 145 [2021-10-08 18:20:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 18:20:41,220 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:20:41,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172391617] [2021-10-08 18:20:41,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172391617] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 18:20:41,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:20:41,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-08 18:20:41,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983913335] [2021-10-08 18:20:41,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:20:41,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:20:41,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:20:41,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:20:41,223 INFO L87 Difference]: Start difference. First operand 125 states and 314 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:20:41,524 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2021-10-08 18:20:41,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 18:20:41,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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 14 [2021-10-08 18:20:41,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:20:41,527 INFO L225 Difference]: With dead ends: 144 [2021-10-08 18:20:41,527 INFO L226 Difference]: Without dead ends: 139 [2021-10-08 18:20:41,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2244.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:20:41,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-08 18:20:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2021-10-08 18:20:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 120 states have (on average 2.6666666666666665) internal successors, (320), 128 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 320 transitions. [2021-10-08 18:20:41,532 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 320 transitions. Word has length 14 [2021-10-08 18:20:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:20:41,532 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 320 transitions. [2021-10-08 18:20:41,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:41,533 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 320 transitions. [2021-10-08 18:20:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 18:20:41,533 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:20:41,534 INFO L512 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2021-10-08 18:20:41,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-08 18:20:41,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:20:41,747 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:20:41,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:20:41,747 INFO L82 PathProgramCache]: Analyzing trace with hash 97890190, now seen corresponding path program 3 times [2021-10-08 18:20:41,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:20:41,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486047598] [2021-10-08 18:20:41,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 18:20:41,749 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:20:41,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:20:41,750 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:20:41,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-08 18:20:42,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-08 18:20:42,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 18:20:42,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 18:20:42,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:20:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:20:42,216 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-08 18:20:42,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-08 18:20:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-10-08 18:20:42,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:20:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-10-08 18:20:44,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:20:44,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486047598] [2021-10-08 18:20:44,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486047598] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 18:20:44,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 18:20:44,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 18:20:44,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933260845] [2021-10-08 18:20:44,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 18:20:44,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 18:20:44,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 18:20:44,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-08 18:20:44,055 INFO L87 Difference]: Start difference. First operand 129 states and 320 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 18:20:44,405 INFO L93 Difference]: Finished difference Result 133 states and 304 transitions. [2021-10-08 18:20:44,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 18:20:44,407 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 15 [2021-10-08 18:20:44,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 18:20:44,408 INFO L225 Difference]: With dead ends: 133 [2021-10-08 18:20:44,408 INFO L226 Difference]: Without dead ends: 133 [2021-10-08 18:20:44,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-08 18:20:44,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-08 18:20:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 95. [2021-10-08 18:20:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 2.340659340659341) internal successors, (213), 94 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 213 transitions. [2021-10-08 18:20:44,414 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 213 transitions. Word has length 15 [2021-10-08 18:20:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 18:20:44,415 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 213 transitions. [2021-10-08 18:20:44,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 18:20:44,416 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 213 transitions. [2021-10-08 18:20:44,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 18:20:44,416 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 18:20:44,416 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 18:20:44,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-08 18:20:44,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:20:44,630 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 26 more)] === [2021-10-08 18:20:44,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 18:20:44,631 INFO L82 PathProgramCache]: Analyzing trace with hash -600183882, now seen corresponding path program 1 times [2021-10-08 18:20:44,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 18:20:44,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608314045] [2021-10-08 18:20:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:20:44,633 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 18:20:44,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 18:20:44,634 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 18:20:44,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-08 18:20:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:20:44,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-08 18:20:44,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:20:44,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-08 18:20:45,628 INFO L354 Elim1Store]: treesize reduction 989, result has 6.0 percent of original size [2021-10-08 18:20:45,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 case distinctions, treesize of input 66 treesize of output 86 [2021-10-08 18:20:49,986 INFO L354 Elim1Store]: treesize reduction 372, result has 0.3 percent of original size [2021-10-08 18:20:49,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 125 treesize of output 59 [2021-10-08 18:20:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 18:20:50,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:20:50,246 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 181 treesize of output 179 [2021-10-08 18:20:50,251 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 179 treesize of output 177 [2021-10-08 18:20:57,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 18:20:57,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608314045] [2021-10-08 18:20:57,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 18:20:57,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [190677841] [2021-10-08 18:20:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:20:57,558 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-08 18:20:57,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-08 18:20:57,559 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-08 18:20:57,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-08 18:20:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:20:58,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-08 18:20:58,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:21:00,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:21:00,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:21:00,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:21:00,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:21:00,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:21:00,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:21:01,209 INFO L354 Elim1Store]: treesize reduction 923, result has 6.4 percent of original size [2021-10-08 18:21:01,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 68 treesize of output 88 [2021-10-08 18:21:05,881 INFO L354 Elim1Store]: treesize reduction 282, result has 0.4 percent of original size [2021-10-08 18:21:05,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 54 [2021-10-08 18:21:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 18:21:06,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:21:06,094 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 181 treesize of output 179 [2021-10-08 18:21:06,099 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 179 treesize of output 177 [2021-10-08 18:21:07,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 18:21:07,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717076961] [2021-10-08 18:21:07,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 18:21:07,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 18:21:07,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 18:21:07,370 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 18:21:07,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-08 18:21:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 18:21:07,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-08 18:21:07,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 18:21:07,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-08 18:21:12,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:21:12,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:21:12,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:21:12,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:21:12,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:21:12,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 18:21:13,198 INFO L354 Elim1Store]: treesize reduction 923, result has 6.4 percent of original size [2021-10-08 18:21:13,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 66 treesize of output 86 [2021-10-08 18:21:19,714 INFO L354 Elim1Store]: treesize reduction 282, result has 0.4 percent of original size [2021-10-08 18:21:19,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 106 treesize of output 52 [2021-10-08 18:21:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 18:21:19,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 18:21:20,012 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 181 treesize of output 179 [2021-10-08 18:21:20,017 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 179 treesize of output 177 [2021-10-08 18:21:24,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 18:21:24,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-08 18:21:24,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-08 18:21:24,351 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-08 18:21:24,352 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-08 18:21:24,357 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 18:21:24,359 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-08 18:21:24,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-08 18:21:24,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-08 18:21:24,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-08 18:21:24,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-08 18:21:24,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-08 18:21:24,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATION [2021-10-08 18:21:24,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATION [2021-10-08 18:21:24,361 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-08 18:21:24,361 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-08 18:21:24,361 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-08 18:21:24,361 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-08 18:21:24,361 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-08 18:21:24,361 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-08 18:21:24,361 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-08 18:21:24,361 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-08 18:21:24,362 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-08 18:21:24,362 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-08 18:21:24,362 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 18:21:24,362 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 18:21:24,362 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 18:21:24,362 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-08 18:21:24,363 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-08 18:21:24,363 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-08 18:21:24,363 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-08 18:21:24,363 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-08 18:21:24,363 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-08 18:21:24,363 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATION [2021-10-08 18:21:24,364 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATION [2021-10-08 18:21:24,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-08 18:21:24,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-08 18:21:24,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-10-08 18:21:24,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-10-08 18:21:24,974 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 18:21:24,974 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 18:21:24,975 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transformations.BlockEncodingBacktranslator.translateProgramExecution(BlockEncodingBacktranslator.java:130) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:589) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-08 18:21:24,978 INFO L168 Benchmark]: Toolchain (without parser) took 175400.86 ms. Allocated memory was 161.5 MB in the beginning and 224.4 MB in the end (delta: 62.9 MB). Free memory was 136.0 MB in the beginning and 122.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 77.5 MB. Max. memory is 8.0 GB. [2021-10-08 18:21:24,978 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 161.5 MB. Free memory is still 135.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-08 18:21:24,978 INFO L168 Benchmark]: CACSL2BoogieTranslator took 431.08 ms. Allocated memory is still 161.5 MB. Free memory was 135.5 MB in the beginning and 122.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-08 18:21:24,979 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.16 ms. Allocated memory is still 161.5 MB. Free memory was 122.1 MB in the beginning and 120.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-08 18:21:24,979 INFO L168 Benchmark]: Boogie Preprocessor took 41.17 ms. Allocated memory is still 161.5 MB. Free memory was 120.2 MB in the beginning and 118.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 18:21:24,980 INFO L168 Benchmark]: RCFGBuilder took 1558.80 ms. Allocated memory is still 161.5 MB. Free memory was 118.5 MB in the beginning and 88.3 MB in the end (delta: 30.2 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. [2021-10-08 18:21:24,980 INFO L168 Benchmark]: TraceAbstraction took 173278.86 ms. Allocated memory was 161.5 MB in the beginning and 224.4 MB in the end (delta: 62.9 MB). Free memory was 87.9 MB in the beginning and 122.8 MB in the end (delta: -34.8 MB). Peak memory consumption was 29.3 MB. Max. memory is 8.0 GB. [2021-10-08 18:21:24,982 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 161.5 MB. Free memory is still 135.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 431.08 ms. Allocated memory is still 161.5 MB. Free memory was 135.5 MB in the beginning and 122.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 75.16 ms. Allocated memory is still 161.5 MB. Free memory was 122.1 MB in the beginning and 120.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.17 ms. Allocated memory is still 161.5 MB. Free memory was 120.2 MB in the beginning and 118.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1558.80 ms. Allocated memory is still 161.5 MB. Free memory was 118.5 MB in the beginning and 88.3 MB in the end (delta: 30.2 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 173278.86 ms. Allocated memory was 161.5 MB in the beginning and 224.4 MB in the end (delta: 62.9 MB). Free memory was 87.9 MB in the beginning and 122.8 MB in the end (delta: -34.8 MB). Peak memory consumption was 29.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 20442.7ms, 138 PlacesBefore, 41 PlacesAfterwards, 143 TransitionsBefore, 37 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 86 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 12 TrivialYvCompositions, 9 ConcurrentYvCompositions, 9 ChoiceCompositions, 161 TotalNumberOfCompositions, 1458 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1444, positive: 1428, positive conditional: 0, positive unconditional: 1428, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 681, positive: 677, positive conditional: 0, positive unconditional: 677, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 681, positive: 677, positive conditional: 0, positive unconditional: 677, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 369, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 369, negative conditional: 0, negative unconditional: 369, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1444, positive: 751, positive conditional: 0, positive unconditional: 751, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 681, unknown conditional: 0, unknown unconditional: 681] , Statistics on independence cache: Total cache size (in pairs): 53, Positive cache size: 52, Positive conditional cache size: 0, Positive unconditional cache size: 52, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transformations.BlockEncodingBacktranslator.translateProgramExecution(BlockEncodingBacktranslator.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-08 18:21:25,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...