/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 16:14:26,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 16:14:26,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 16:14:26,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-07 16:14:26,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-07 16:14:26,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-07 16:14:26,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-07 16:14:26,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-07 16:14:26,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-07 16:14:26,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-07 16:14:26,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-07 16:14:26,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-07 16:14:26,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 16:14:26,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 16:14:26,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 16:14:26,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 16:14:26,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 16:14:27,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 16:14:27,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 16:14:27,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 16:14:27,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 16:14:27,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 16:14:27,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 16:14:27,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 16:14:27,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-07 16:14:27,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-07 16:14:27,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-07 16:14:27,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-07 16:14:27,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-07 16:14:27,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-07 16:14:27,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-07 16:14:27,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-07 16:14:27,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-07 16:14:27,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 16:14:27,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 16:14:27,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 16:14:27,058 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 16:14:27,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 16:14:27,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 16:14:27,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 16:14:27,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 16:14:27,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 16:14:27,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 16:14:27,115 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 16:14:27,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 16:14:27,116 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 16:14:27,116 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 16:14:27,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 16:14:27,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 16:14:27,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 16:14:27,118 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 16:14:27,118 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 16:14:27,119 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 16:14:27,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 16:14:27,119 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 16:14:27,119 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 16:14:27,120 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 16:14:27,120 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 16:14:27,120 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 16:14:27,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 16:14:27,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 16:14:27,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 16:14:27,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:14:27,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 16:14:27,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 16:14:27,122 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 16:14:27,122 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 16:14:27,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 16:14:27,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 16:14:27,123 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 16:14:27,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 16:14:27,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 16:14:27,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 16:14:27,599 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 16:14:27,600 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 16:14:27,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2021-10-07 16:14:27,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b015d4041/16fd768d3eb4436aa99dd20773b593e2/FLAGa50c61c6b [2021-10-07 16:14:28,361 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 16:14:28,362 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2021-10-07 16:14:28,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b015d4041/16fd768d3eb4436aa99dd20773b593e2/FLAGa50c61c6b [2021-10-07 16:14:28,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b015d4041/16fd768d3eb4436aa99dd20773b593e2 [2021-10-07 16:14:28,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 16:14:28,692 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 16:14:28,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 16:14:28,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 16:14:28,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 16:14:28,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:14:28" (1/1) ... [2021-10-07 16:14:28,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb58a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:28, skipping insertion in model container [2021-10-07 16:14:28,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:14:28" (1/1) ... [2021-10-07 16:14:28,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 16:14:28,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:14:28,918 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2574,2587] [2021-10-07 16:14:28,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:14:28,945 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-07 16:14:28,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:14:28,988 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2574,2587] [2021-10-07 16:14:28,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:14:29,010 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 16:14:29,072 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2574,2587] [2021-10-07 16:14:29,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:14:29,118 INFO L208 MainTranslator]: Completed translation [2021-10-07 16:14:29,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:29 WrapperNode [2021-10-07 16:14:29,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 16:14:29,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 16:14:29,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 16:14:29,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 16:14:29,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:29" (1/1) ... [2021-10-07 16:14:29,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:29" (1/1) ... [2021-10-07 16:14:29,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 16:14:29,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 16:14:29,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 16:14:29,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 16:14:29,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:29" (1/1) ... [2021-10-07 16:14:29,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:29" (1/1) ... [2021-10-07 16:14:29,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:29" (1/1) ... [2021-10-07 16:14:29,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:29" (1/1) ... [2021-10-07 16:14:29,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:29" (1/1) ... [2021-10-07 16:14:29,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:29" (1/1) ... [2021-10-07 16:14:29,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:29" (1/1) ... [2021-10-07 16:14:29,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 16:14:29,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 16:14:29,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 16:14:29,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 16:14:29,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:29" (1/1) ... [2021-10-07 16:14:29,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:14:29,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 16:14:29,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-07 16:14:29,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-07 16:14:29,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 16:14:29,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 16:14:29,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 16:14:29,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 16:14:29,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 16:14:29,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 16:14:29,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 16:14:29,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 16:14:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-07 16:14:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-07 16:14:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 16:14:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 16:14:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 16:14:29,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 16:14:29,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 16:14:29,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 16:14:29,370 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 16:14:30,556 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 16:14:30,556 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-07 16:14:30,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:14:30 BoogieIcfgContainer [2021-10-07 16:14:30,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 16:14:30,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 16:14:30,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 16:14:30,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 16:14:30,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 04:14:28" (1/3) ... [2021-10-07 16:14:30,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374d26cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:14:30, skipping insertion in model container [2021-10-07 16:14:30,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:29" (2/3) ... [2021-10-07 16:14:30,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374d26cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:14:30, skipping insertion in model container [2021-10-07 16:14:30,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:14:30" (3/3) ... [2021-10-07 16:14:30,568 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2021-10-07 16:14:30,575 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 16:14:30,575 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-10-07 16:14:30,575 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 16:14:30,624 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,625 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,627 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,627 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,627 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,627 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,628 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,628 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,628 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,628 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,628 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,629 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,629 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,629 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,629 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,630 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,630 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,630 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,630 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,631 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,631 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,631 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,631 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,631 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,633 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,633 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,633 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,633 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,634 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,639 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,639 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,639 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,639 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,640 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,640 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,640 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,641 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,641 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,641 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,641 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,641 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,642 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,642 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,643 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,643 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,643 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,643 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,644 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,644 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,644 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,645 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,645 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,645 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,645 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,645 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,646 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,646 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,646 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,647 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,647 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,648 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,648 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,648 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,648 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,649 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,649 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,649 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,649 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,650 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,650 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,650 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,651 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,651 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,651 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,652 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,652 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,652 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,652 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,652 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,653 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,653 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,653 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,653 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,654 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,654 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,655 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,655 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,656 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,657 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,658 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,661 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,665 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,667 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,667 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,667 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,667 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,668 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,668 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,668 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,668 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,668 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,668 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,676 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,676 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,676 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,677 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,677 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,677 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,679 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,679 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,680 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,680 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,680 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,680 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,682 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,682 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,683 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,683 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,683 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,683 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:30,690 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-07 16:14:30,746 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 16:14:30,764 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-07 16:14:30,765 INFO L340 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2021-10-07 16:14:30,802 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 16:14:30,818 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 172 transitions, 368 flow [2021-10-07 16:14:30,826 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 172 transitions, 368 flow [2021-10-07 16:14:30,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 172 transitions, 368 flow [2021-10-07 16:14:30,960 INFO L129 PetriNetUnfolder]: 13/169 cut-off events. [2021-10-07 16:14:30,960 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-07 16:14:30,967 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 169 events. 13/169 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2021-10-07 16:14:30,975 INFO L116 LiptonReduction]: Number of co-enabled transitions 2688 [2021-10-07 16:14:57,687 INFO L131 LiptonReduction]: Checked pairs total: 3569 [2021-10-07 16:14:57,688 INFO L133 LiptonReduction]: Total number of compositions: 181 [2021-10-07 16:14:57,699 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2021-10-07 16:14:57,797 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:14:57,812 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:57,813 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:14:57,813 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:57,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:57,820 INFO L82 PathProgramCache]: Analyzing trace with hash 22959, now seen corresponding path program 1 times [2021-10-07 16:14:57,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:57,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058756680] [2021-10-07 16:14:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:57,840 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:57,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:57,845 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:14:57,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 16:14:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:57,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:14:57,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:58,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:14:58,474 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:14:58,475 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:14:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:14:58,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:14:58,683 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:58,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058756680] [2021-10-07 16:14:58,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058756680] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:14:58,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:14:58,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:14:58,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336524390] [2021-10-07 16:14:58,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:14:58,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:58,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:14:58,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:58,720 INFO L87 Difference]: Start difference. First operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:59,350 INFO L93 Difference]: Finished difference Result 1498 states and 5133 transitions. [2021-10-07 16:14:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:14:59,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:14:59,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:59,389 INFO L225 Difference]: With dead ends: 1498 [2021-10-07 16:14:59,389 INFO L226 Difference]: Without dead ends: 1498 [2021-10-07 16:14:59,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:59,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-10-07 16:14:59,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 751. [2021-10-07 16:14:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 618 states have (on average 4.166666666666667) internal successors, (2575), 750 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2575 transitions. [2021-10-07 16:14:59,577 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2575 transitions. Word has length 2 [2021-10-07 16:14:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:59,578 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2575 transitions. [2021-10-07 16:14:59,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:59,579 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2575 transitions. [2021-10-07 16:14:59,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:14:59,579 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:59,579 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:14:59,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-07 16:14:59,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:14:59,795 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:59,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:59,797 INFO L82 PathProgramCache]: Analyzing trace with hash 23067, now seen corresponding path program 1 times [2021-10-07 16:14:59,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:59,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648374551] [2021-10-07 16:14:59,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:59,798 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:59,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:59,801 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:14:59,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 16:14:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:59,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 16:14:59,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:14:59,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:14:59,962 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:59,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648374551] [2021-10-07 16:14:59,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648374551] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:14:59,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:14:59,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:14:59,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788427922] [2021-10-07 16:14:59,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:14:59,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:59,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:14:59,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:59,967 INFO L87 Difference]: Start difference. First operand 751 states and 2575 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:00,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:00,106 INFO L93 Difference]: Finished difference Result 752 states and 2572 transitions. [2021-10-07 16:15:00,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:15:00,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:15:00,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:00,116 INFO L225 Difference]: With dead ends: 752 [2021-10-07 16:15:00,116 INFO L226 Difference]: Without dead ends: 752 [2021-10-07 16:15:00,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:15:00,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-10-07 16:15:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 751. [2021-10-07 16:15:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 618 states have (on average 4.1618122977346275) internal successors, (2572), 750 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:00,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2572 transitions. [2021-10-07 16:15:00,151 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2572 transitions. Word has length 2 [2021-10-07 16:15:00,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:00,151 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2572 transitions. [2021-10-07 16:15:00,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:00,152 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2572 transitions. [2021-10-07 16:15:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:15:00,152 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:00,152 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:15:00,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:00,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:00,366 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:00,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:00,367 INFO L82 PathProgramCache]: Analyzing trace with hash 22957, now seen corresponding path program 1 times [2021-10-07 16:15:00,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:00,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854436135] [2021-10-07 16:15:00,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:00,369 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:00,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:00,370 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:00,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 16:15:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:00,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:15:00,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:00,646 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:15:00,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:15:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:01,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:01,389 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:01,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854436135] [2021-10-07 16:15:01,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854436135] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:15:01,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:15:01,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:15:01,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353894516] [2021-10-07 16:15:01,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:15:01,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:15:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:15:01,395 INFO L87 Difference]: Start difference. First operand 751 states and 2572 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:01,513 INFO L93 Difference]: Finished difference Result 750 states and 2569 transitions. [2021-10-07 16:15:01,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:15:01,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:15:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:01,525 INFO L225 Difference]: With dead ends: 750 [2021-10-07 16:15:01,525 INFO L226 Difference]: Without dead ends: 750 [2021-10-07 16:15:01,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:15:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-10-07 16:15:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2021-10-07 16:15:01,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 618 states have (on average 4.156957928802589) internal successors, (2569), 749 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2569 transitions. [2021-10-07 16:15:01,558 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2569 transitions. Word has length 2 [2021-10-07 16:15:01,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:01,558 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2569 transitions. [2021-10-07 16:15:01,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2569 transitions. [2021-10-07 16:15:01,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:15:01,559 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:01,559 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:15:01,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:01,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:01,771 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash 715142, now seen corresponding path program 1 times [2021-10-07 16:15:01,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:01,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010013664] [2021-10-07 16:15:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:01,774 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:01,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:01,775 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:01,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 16:15:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:01,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:15:01,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:02,129 INFO L354 Elim1Store]: treesize reduction 358, result has 15.4 percent of original size [2021-10-07 16:15:02,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 521 treesize of output 530 [2021-10-07 16:15:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:08,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:08,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:08,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010013664] [2021-10-07 16:15:08,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010013664] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:15:08,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:15:08,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:15:08,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040972493] [2021-10-07 16:15:08,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:15:08,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:08,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:15:08,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:15:08,119 INFO L87 Difference]: Start difference. First operand 750 states and 2569 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) [2021-10-07 16:15:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:08,358 INFO L93 Difference]: Finished difference Result 624 states and 2067 transitions. [2021-10-07 16:15:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:15:08,360 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 [2021-10-07 16:15:08,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:08,368 INFO L225 Difference]: With dead ends: 624 [2021-10-07 16:15:08,368 INFO L226 Difference]: Without dead ends: 624 [2021-10-07 16:15:08,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:15:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-10-07 16:15:08,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2021-10-07 16:15:08,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 520 states have (on average 3.975) internal successors, (2067), 623 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:08,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 2067 transitions. [2021-10-07 16:15:08,398 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 2067 transitions. Word has length 3 [2021-10-07 16:15:08,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:08,399 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 2067 transitions. [2021-10-07 16:15:08,399 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) [2021-10-07 16:15:08,399 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 2067 transitions. [2021-10-07 16:15:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:15:08,399 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:08,400 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:15:08,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:08,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:08,612 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:08,613 INFO L82 PathProgramCache]: Analyzing trace with hash 715143, now seen corresponding path program 1 times [2021-10-07 16:15:08,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:08,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424047945] [2021-10-07 16:15:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:08,615 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:08,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:08,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:08,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 16:15:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:08,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:15:08,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:09,075 INFO L354 Elim1Store]: treesize reduction 241, result has 18.6 percent of original size [2021-10-07 16:15:09,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 105 [2021-10-07 16:15:09,094 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-07 16:15:09,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 269 [2021-10-07 16:15:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:10,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:11,032 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:11,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424047945] [2021-10-07 16:15:11,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424047945] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:15:11,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:15:11,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2021-10-07 16:15:11,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414044287] [2021-10-07 16:15:11,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:15:11,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:11,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:15:11,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:15:11,035 INFO L87 Difference]: Start difference. First operand 624 states and 2067 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:11,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:11,169 INFO L93 Difference]: Finished difference Result 498 states and 1565 transitions. [2021-10-07 16:15:11,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:15:11,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 16:15:11,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:11,176 INFO L225 Difference]: With dead ends: 498 [2021-10-07 16:15:11,177 INFO L226 Difference]: Without dead ends: 498 [2021-10-07 16:15:11,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:15:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-10-07 16:15:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2021-10-07 16:15:11,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 422 states have (on average 3.7085308056872037) internal successors, (1565), 497 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1565 transitions. [2021-10-07 16:15:11,199 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1565 transitions. Word has length 3 [2021-10-07 16:15:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:11,199 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1565 transitions. [2021-10-07 16:15:11,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1565 transitions. [2021-10-07 16:15:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:15:11,200 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:11,200 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 16:15:11,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-07 16:15:11,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:11,414 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:11,415 INFO L82 PathProgramCache]: Analyzing trace with hash 22169359, now seen corresponding path program 1 times [2021-10-07 16:15:11,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:11,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318773147] [2021-10-07 16:15:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:11,417 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:11,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:11,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:11,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 16:15:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:11,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:15:11,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:11,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:11,789 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:11,790 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:11,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:12,448 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:12,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318773147] [2021-10-07 16:15:12,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318773147] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:12,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:12,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:15:12,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57405626] [2021-10-07 16:15:12,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:15:12,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:12,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:15:12,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:15:12,450 INFO L87 Difference]: Start difference. First operand 498 states and 1565 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:14,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:14,161 INFO L93 Difference]: Finished difference Result 2474 states and 7805 transitions. [2021-10-07 16:15:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:15:14,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 16:15:14,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:14,187 INFO L225 Difference]: With dead ends: 2474 [2021-10-07 16:15:14,187 INFO L226 Difference]: Without dead ends: 2474 [2021-10-07 16:15:14,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 809.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-10-07 16:15:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 502. [2021-10-07 16:15:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 426 states have (on average 3.692488262910798) internal successors, (1573), 501 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1573 transitions. [2021-10-07 16:15:14,233 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1573 transitions. Word has length 4 [2021-10-07 16:15:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:14,234 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1573 transitions. [2021-10-07 16:15:14,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:14,234 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1573 transitions. [2021-10-07 16:15:14,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:15:14,234 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:14,235 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:15:14,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:14,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:14,444 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:14,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:14,446 INFO L82 PathProgramCache]: Analyzing trace with hash 687266745, now seen corresponding path program 1 times [2021-10-07 16:15:14,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:14,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394158075] [2021-10-07 16:15:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:14,447 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:14,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:14,448 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:14,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 16:15:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:14,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:15:14,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:14,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:14,780 INFO L354 Elim1Store]: treesize reduction 235, result has 20.6 percent of original size [2021-10-07 16:15:14,781 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 5 case distinctions, treesize of input 48 treesize of output 92 [2021-10-07 16:15:14,796 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 233 treesize of output 225 [2021-10-07 16:15:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:20,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:20,388 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:20,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394158075] [2021-10-07 16:15:20,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394158075] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:20,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:20,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:15:20,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541777435] [2021-10-07 16:15:20,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:15:20,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:20,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:15:20,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:15:20,391 INFO L87 Difference]: Start difference. First operand 502 states and 1573 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:20,910 INFO L93 Difference]: Finished difference Result 935 states and 2961 transitions. [2021-10-07 16:15:20,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:15:20,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 16:15:20,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:20,921 INFO L225 Difference]: With dead ends: 935 [2021-10-07 16:15:20,922 INFO L226 Difference]: Without dead ends: 935 [2021-10-07 16:15:20,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 322.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-10-07 16:15:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 472. [2021-10-07 16:15:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 408 states have (on average 3.6470588235294117) internal successors, (1488), 471 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1488 transitions. [2021-10-07 16:15:20,948 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1488 transitions. Word has length 5 [2021-10-07 16:15:20,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:20,949 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1488 transitions. [2021-10-07 16:15:20,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1488 transitions. [2021-10-07 16:15:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:15:20,950 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:20,950 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:15:20,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:21,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:21,157 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:21,158 INFO L82 PathProgramCache]: Analyzing trace with hash 687266746, now seen corresponding path program 1 times [2021-10-07 16:15:21,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:21,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999490461] [2021-10-07 16:15:21,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:21,159 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:21,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:21,160 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:21,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 16:15:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:21,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:15:21,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:21,474 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:15:21,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 166 treesize of output 207 [2021-10-07 16:15:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:27,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:27,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:27,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999490461] [2021-10-07 16:15:27,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999490461] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:15:27,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:15:27,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:15:27,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9159972] [2021-10-07 16:15:27,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:15:27,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:27,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:15:27,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:15:27,395 INFO L87 Difference]: Start difference. First operand 472 states and 1488 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:27,501 INFO L93 Difference]: Finished difference Result 442 states and 1403 transitions. [2021-10-07 16:15:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:15:27,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 16:15:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:27,507 INFO L225 Difference]: With dead ends: 442 [2021-10-07 16:15:27,507 INFO L226 Difference]: Without dead ends: 442 [2021-10-07 16:15:27,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:15:27,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-10-07 16:15:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-10-07 16:15:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 390 states have (on average 3.5974358974358975) internal successors, (1403), 441 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1403 transitions. [2021-10-07 16:15:27,525 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1403 transitions. Word has length 5 [2021-10-07 16:15:27,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:27,525 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1403 transitions. [2021-10-07 16:15:27,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1403 transitions. [2021-10-07 16:15:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:15:27,526 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:27,526 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:15:27,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:27,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:27,744 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:27,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:27,744 INFO L82 PathProgramCache]: Analyzing trace with hash -169572761, now seen corresponding path program 1 times [2021-10-07 16:15:27,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:27,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670372987] [2021-10-07 16:15:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:27,746 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:27,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:27,746 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:27,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 16:15:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:27,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 16:15:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:27,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:28,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-07 16:15:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:28,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:28,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670372987] [2021-10-07 16:15:28,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670372987] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:28,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:28,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:15:28,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745640648] [2021-10-07 16:15:28,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:15:28,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:28,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:15:28,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:28,213 INFO L87 Difference]: Start difference. First operand 442 states and 1403 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) [2021-10-07 16:15:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:28,968 INFO L93 Difference]: Finished difference Result 1451 states and 4609 transitions. [2021-10-07 16:15:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:15:28,970 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 [2021-10-07 16:15:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:28,984 INFO L225 Difference]: With dead ends: 1451 [2021-10-07 16:15:28,984 INFO L226 Difference]: Without dead ends: 1451 [2021-10-07 16:15:28,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 429.5ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:15:28,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-10-07 16:15:29,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 514. [2021-10-07 16:15:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 462 states have (on average 3.865800865800866) internal successors, (1786), 513 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1786 transitions. [2021-10-07 16:15:29,016 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1786 transitions. Word has length 6 [2021-10-07 16:15:29,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:29,017 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1786 transitions. [2021-10-07 16:15:29,017 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) [2021-10-07 16:15:29,017 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1786 transitions. [2021-10-07 16:15:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:15:29,018 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:29,018 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:15:29,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:29,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:29,231 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:29,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:29,232 INFO L82 PathProgramCache]: Analyzing trace with hash -169572760, now seen corresponding path program 1 times [2021-10-07 16:15:29,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:29,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605855996] [2021-10-07 16:15:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:29,233 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:29,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:29,234 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:29,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-07 16:15:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:29,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:15:29,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:29,539 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:15:29,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:15:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:30,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:30,069 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:30,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605855996] [2021-10-07 16:15:30,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605855996] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:15:30,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:15:30,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-07 16:15:30,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070674699] [2021-10-07 16:15:30,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:15:30,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:30,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:15:30,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:15:30,072 INFO L87 Difference]: Start difference. First operand 514 states and 1786 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) [2021-10-07 16:15:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:30,193 INFO L93 Difference]: Finished difference Result 310 states and 1016 transitions. [2021-10-07 16:15:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:15:30,194 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 [2021-10-07 16:15:30,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:30,197 INFO L225 Difference]: With dead ends: 310 [2021-10-07 16:15:30,197 INFO L226 Difference]: Without dead ends: 310 [2021-10-07 16:15:30,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 16:15:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-10-07 16:15:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2021-10-07 16:15:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 289 states have (on average 3.5155709342560555) internal successors, (1016), 309 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:30,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1016 transitions. [2021-10-07 16:15:30,209 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1016 transitions. Word has length 6 [2021-10-07 16:15:30,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:30,209 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 1016 transitions. [2021-10-07 16:15:30,210 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) [2021-10-07 16:15:30,210 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1016 transitions. [2021-10-07 16:15:30,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:15:30,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:30,210 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:30,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:30,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:30,423 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:30,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:30,424 INFO L82 PathProgramCache]: Analyzing trace with hash -961784061, now seen corresponding path program 1 times [2021-10-07 16:15:30,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:30,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155002244] [2021-10-07 16:15:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:30,425 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:30,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:30,426 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:30,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-07 16:15:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:30,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:15:30,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:30,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:30,773 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:30,774 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:31,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:31,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:31,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155002244] [2021-10-07 16:15:31,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155002244] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:31,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:31,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:15:31,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241186137] [2021-10-07 16:15:31,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:15:31,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:31,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:15:31,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:31,598 INFO L87 Difference]: Start difference. First operand 310 states and 1016 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:32,665 INFO L93 Difference]: Finished difference Result 560 states and 1852 transitions. [2021-10-07 16:15:32,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:15:32,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:15:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:32,672 INFO L225 Difference]: With dead ends: 560 [2021-10-07 16:15:32,672 INFO L226 Difference]: Without dead ends: 560 [2021-10-07 16:15:32,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 891.3ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:15:32,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-10-07 16:15:32,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 460. [2021-10-07 16:15:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 439 states have (on average 3.662870159453303) internal successors, (1608), 459 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:32,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1608 transitions. [2021-10-07 16:15:32,695 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1608 transitions. Word has length 7 [2021-10-07 16:15:32,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:32,696 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1608 transitions. [2021-10-07 16:15:32,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:32,696 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1608 transitions. [2021-10-07 16:15:32,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:15:32,697 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:32,697 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:32,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:32,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:32,910 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:32,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:32,910 INFO L82 PathProgramCache]: Analyzing trace with hash -961603340, now seen corresponding path program 1 times [2021-10-07 16:15:32,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:32,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908926714] [2021-10-07 16:15:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:32,912 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:32,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:32,914 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:32,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-07 16:15:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:33,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 16:15:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:33,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:33,309 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:33,310 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:33,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:33,821 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:33,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908926714] [2021-10-07 16:15:33,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908926714] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:33,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:33,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:15:33,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80948235] [2021-10-07 16:15:33,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:15:33,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:33,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:15:33,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:15:33,822 INFO L87 Difference]: Start difference. First operand 460 states and 1608 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:34,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:34,168 INFO L93 Difference]: Finished difference Result 839 states and 2969 transitions. [2021-10-07 16:15:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:15:34,169 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:15:34,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:34,175 INFO L225 Difference]: With dead ends: 839 [2021-10-07 16:15:34,176 INFO L226 Difference]: Without dead ends: 839 [2021-10-07 16:15:34,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-10-07 16:15:34,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 424. [2021-10-07 16:15:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 3.647921760391198) internal successors, (1492), 423 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1492 transitions. [2021-10-07 16:15:34,208 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1492 transitions. Word has length 7 [2021-10-07 16:15:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:34,208 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1492 transitions. [2021-10-07 16:15:34,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1492 transitions. [2021-10-07 16:15:34,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:15:34,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:34,210 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:34,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-07 16:15:34,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:34,423 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:34,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:34,424 INFO L82 PathProgramCache]: Analyzing trace with hash -961603338, now seen corresponding path program 1 times [2021-10-07 16:15:34,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:34,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907188051] [2021-10-07 16:15:34,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:34,425 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:34,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:34,426 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:34,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-07 16:15:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:34,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:15:34,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:34,798 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:15:34,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:15:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:35,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:35,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:35,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907188051] [2021-10-07 16:15:35,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907188051] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:15:35,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:15:35,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:15:35,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557329258] [2021-10-07 16:15:35,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:15:35,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:35,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:15:35,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:15:35,337 INFO L87 Difference]: Start difference. First operand 424 states and 1492 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:35,399 INFO L93 Difference]: Finished difference Result 388 states and 1376 transitions. [2021-10-07 16:15:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:15:35,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:15:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:35,403 INFO L225 Difference]: With dead ends: 388 [2021-10-07 16:15:35,403 INFO L226 Difference]: Without dead ends: 388 [2021-10-07 16:15:35,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:15:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-10-07 16:15:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2021-10-07 16:15:35,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 379 states have (on average 3.6306068601583115) internal successors, (1376), 387 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1376 transitions. [2021-10-07 16:15:35,417 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1376 transitions. Word has length 7 [2021-10-07 16:15:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:35,418 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1376 transitions. [2021-10-07 16:15:35,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:35,418 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1376 transitions. [2021-10-07 16:15:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:15:35,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:35,419 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-07 16:15:35,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:35,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:35,635 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:35,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:35,636 INFO L82 PathProgramCache]: Analyzing trace with hash -138765873, now seen corresponding path program 2 times [2021-10-07 16:15:35,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:35,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553713169] [2021-10-07 16:15:35,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:15:35,638 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:35,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:35,639 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:35,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-07 16:15:35,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:15:35,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:15:35,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:15:35,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:35,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:36,055 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:36,055 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:36,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:38,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:38,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553713169] [2021-10-07 16:15:38,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553713169] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:38,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:38,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:15:38,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410331553] [2021-10-07 16:15:38,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:15:38,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:38,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:15:38,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:15:38,118 INFO L87 Difference]: Start difference. First operand 388 states and 1376 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:45,663 INFO L93 Difference]: Finished difference Result 4944 states and 17724 transitions. [2021-10-07 16:15:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 16:15:45,665 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 16:15:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:45,717 INFO L225 Difference]: With dead ends: 4944 [2021-10-07 16:15:45,717 INFO L226 Difference]: Without dead ends: 4944 [2021-10-07 16:15:45,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5490.7ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:15:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4944 states. [2021-10-07 16:15:45,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4944 to 396. [2021-10-07 16:15:45,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 387 states have (on average 3.5968992248062017) internal successors, (1392), 395 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:45,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1392 transitions. [2021-10-07 16:15:45,784 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1392 transitions. Word has length 8 [2021-10-07 16:15:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:45,784 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1392 transitions. [2021-10-07 16:15:45,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1392 transitions. [2021-10-07 16:15:45,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:15:45,785 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:45,785 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:45,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-07 16:15:45,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:45,998 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:45,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:45,999 INFO L82 PathProgramCache]: Analyzing trace with hash 255062330, now seen corresponding path program 1 times [2021-10-07 16:15:46,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:46,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192012295] [2021-10-07 16:15:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:46,001 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:46,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:46,003 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:46,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-07 16:15:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 16:15:46,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:46,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:46,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-07 16:15:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:46,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:46,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192012295] [2021-10-07 16:15:46,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192012295] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:46,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:46,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:15:46,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805420234] [2021-10-07 16:15:46,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:15:46,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:46,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:15:46,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:46,527 INFO L87 Difference]: Start difference. First operand 396 states and 1392 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:47,132 INFO L93 Difference]: Finished difference Result 1147 states and 4093 transitions. [2021-10-07 16:15:47,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:15:47,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 16:15:47,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:47,140 INFO L225 Difference]: With dead ends: 1147 [2021-10-07 16:15:47,140 INFO L226 Difference]: Without dead ends: 1147 [2021-10-07 16:15:47,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 414.8ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:15:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-10-07 16:15:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 484. [2021-10-07 16:15:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 475 states have (on average 3.8021052631578947) internal successors, (1806), 483 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1806 transitions. [2021-10-07 16:15:47,164 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1806 transitions. Word has length 8 [2021-10-07 16:15:47,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:47,164 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1806 transitions. [2021-10-07 16:15:47,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1806 transitions. [2021-10-07 16:15:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 16:15:47,165 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:47,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:47,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:47,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:47,378 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:47,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:47,379 INFO L82 PathProgramCache]: Analyzing trace with hash -682999256, now seen corresponding path program 1 times [2021-10-07 16:15:47,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:47,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757934047] [2021-10-07 16:15:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:47,380 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:47,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:47,382 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:47,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-07 16:15:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:47,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:15:47,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:47,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:47,760 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:47,761 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:48,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:48,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:48,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757934047] [2021-10-07 16:15:48,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757934047] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:48,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:48,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:15:48,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107343575] [2021-10-07 16:15:48,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:15:48,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:48,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:15:48,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:48,506 INFO L87 Difference]: Start difference. First operand 484 states and 1806 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:49,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:49,778 INFO L93 Difference]: Finished difference Result 1042 states and 3816 transitions. [2021-10-07 16:15:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:15:49,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 16:15:49,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:49,783 INFO L225 Difference]: With dead ends: 1042 [2021-10-07 16:15:49,784 INFO L226 Difference]: Without dead ends: 1042 [2021-10-07 16:15:49,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 864.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:15:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-10-07 16:15:49,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 748. [2021-10-07 16:15:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 739 states have (on average 4.124492557510149) internal successors, (3048), 747 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 3048 transitions. [2021-10-07 16:15:49,832 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 3048 transitions. Word has length 9 [2021-10-07 16:15:49,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:49,833 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 3048 transitions. [2021-10-07 16:15:49,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:49,834 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 3048 transitions. [2021-10-07 16:15:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:15:49,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:49,835 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:49,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:50,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:50,053 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:50,054 INFO L82 PathProgramCache]: Analyzing trace with hash -777925273, now seen corresponding path program 2 times [2021-10-07 16:15:50,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:50,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959798947] [2021-10-07 16:15:50,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:15:50,055 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:50,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:50,056 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:50,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-07 16:15:50,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:15:50,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:15:50,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 16:15:50,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:50,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:50,540 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:50,540 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:50,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:52,266 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:52,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959798947] [2021-10-07 16:15:52,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959798947] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:52,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:52,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-07 16:15:52,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978099587] [2021-10-07 16:15:52,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:15:52,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:52,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:15:52,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:15:52,270 INFO L87 Difference]: Start difference. First operand 748 states and 3048 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:02,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:02,374 INFO L93 Difference]: Finished difference Result 2432 states and 9316 transitions. [2021-10-07 16:16:02,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 16:16:02,377 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 16:16:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:02,389 INFO L225 Difference]: With dead ends: 2432 [2021-10-07 16:16:02,390 INFO L226 Difference]: Without dead ends: 2432 [2021-10-07 16:16:02,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 4877.6ms TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2021-10-07 16:16:02,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-10-07 16:16:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1242. [2021-10-07 16:16:02,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1233 states have (on average 4.077858880778589) internal successors, (5028), 1241 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 5028 transitions. [2021-10-07 16:16:02,474 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 5028 transitions. Word has length 10 [2021-10-07 16:16:02,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:02,474 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 5028 transitions. [2021-10-07 16:16:02,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:02,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 5028 transitions. [2021-10-07 16:16:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:16:02,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:02,477 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:16:02,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-07 16:16:02,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:16:02,691 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:02,691 INFO L82 PathProgramCache]: Analyzing trace with hash 307293158, now seen corresponding path program 1 times [2021-10-07 16:16:02,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:02,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689369275] [2021-10-07 16:16:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:16:02,692 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:02,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:02,693 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:16:02,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-07 16:16:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:16:02,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 16:16:02,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:02,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:03,129 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:03,129 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:16:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:03,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:04,161 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:04,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689369275] [2021-10-07 16:16:04,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689369275] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:04,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:04,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:16:04,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826766750] [2021-10-07 16:16:04,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:16:04,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:04,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:16:04,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:16:04,164 INFO L87 Difference]: Start difference. First operand 1242 states and 5028 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:07,559 INFO L93 Difference]: Finished difference Result 2372 states and 9590 transitions. [2021-10-07 16:16:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 16:16:07,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 16:16:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:07,574 INFO L225 Difference]: With dead ends: 2372 [2021-10-07 16:16:07,574 INFO L226 Difference]: Without dead ends: 2372 [2021-10-07 16:16:07,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2122.0ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:16:07,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2021-10-07 16:16:07,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 1760. [2021-10-07 16:16:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1751 states have (on average 4.138206739006282) internal successors, (7246), 1759 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 7246 transitions. [2021-10-07 16:16:07,654 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 7246 transitions. Word has length 10 [2021-10-07 16:16:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:07,654 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 7246 transitions. [2021-10-07 16:16:07,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 7246 transitions. [2021-10-07 16:16:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 16:16:07,656 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:07,656 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:16:07,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-07 16:16:07,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:16:07,870 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:07,870 INFO L82 PathProgramCache]: Analyzing trace with hash 936156681, now seen corresponding path program 1 times [2021-10-07 16:16:07,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:07,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487631661] [2021-10-07 16:16:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:16:07,871 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:07,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:07,872 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:16:07,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-07 16:16:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:16:08,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-07 16:16:08,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:08,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:08,563 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:08,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487631661] [2021-10-07 16:16:08,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487631661] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:08,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:08,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:16:08,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114405121] [2021-10-07 16:16:08,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:16:08,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:08,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:16:08,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:16:08,565 INFO L87 Difference]: Start difference. First operand 1760 states and 7246 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-10-07 16:16:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:09,409 INFO L93 Difference]: Finished difference Result 1782 states and 7190 transitions. [2021-10-07 16:16:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 16:16:09,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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 [2021-10-07 16:16:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:09,418 INFO L225 Difference]: With dead ends: 1782 [2021-10-07 16:16:09,418 INFO L226 Difference]: Without dead ends: 1782 [2021-10-07 16:16:09,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 461.6ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:16:09,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-10-07 16:16:09,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1746. [2021-10-07 16:16:09,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1737 states have (on average 4.095567069660334) internal successors, (7114), 1745 states have internal predecessors, (7114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 7114 transitions. [2021-10-07 16:16:09,485 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 7114 transitions. Word has length 11 [2021-10-07 16:16:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:09,485 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 7114 transitions. [2021-10-07 16:16:09,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-10-07 16:16:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 7114 transitions. [2021-10-07 16:16:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:16:09,487 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:09,487 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2021-10-07 16:16:09,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-07 16:16:09,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:16:09,701 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:09,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:09,702 INFO L82 PathProgramCache]: Analyzing trace with hash -290420488, now seen corresponding path program 3 times [2021-10-07 16:16:09,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:09,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879725707] [2021-10-07 16:16:09,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:16:09,703 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:09,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:09,704 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:16:09,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-07 16:16:10,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 16:16:10,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:10,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 16:16:10,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:10,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:10,431 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:10,431 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:16:10,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:10,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:10,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:10,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:10,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:10,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:10,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2021-10-07 16:16:10,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-10-07 16:16:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:10,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:11,158 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 9 treesize of output 7 [2021-10-07 16:16:11,197 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:16:11,200 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:16:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:13,402 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:13,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879725707] [2021-10-07 16:16:13,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879725707] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:13,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:13,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2021-10-07 16:16:13,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668641835] [2021-10-07 16:16:13,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-07 16:16:13,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:13,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-07 16:16:13,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-10-07 16:16:13,404 INFO L87 Difference]: Start difference. First operand 1746 states and 7114 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:25,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:25,756 INFO L93 Difference]: Finished difference Result 5006 states and 19410 transitions. [2021-10-07 16:16:25,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 16:16:25,758 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 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 [2021-10-07 16:16:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:25,775 INFO L225 Difference]: With dead ends: 5006 [2021-10-07 16:16:25,775 INFO L226 Difference]: Without dead ends: 5006 [2021-10-07 16:16:25,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 7153.6ms TimeCoverageRelationStatistics Valid=309, Invalid=1097, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 16:16:25,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-10-07 16:16:25,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 2714. [2021-10-07 16:16:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2705 states have (on average 4.269870609981516) internal successors, (11550), 2713 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 11550 transitions. [2021-10-07 16:16:25,904 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 11550 transitions. Word has length 12 [2021-10-07 16:16:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:25,904 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 11550 transitions. [2021-10-07 16:16:25,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 11550 transitions. [2021-10-07 16:16:25,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:16:25,906 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:25,906 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:16:25,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-07 16:16:26,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:16:26,122 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:26,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:26,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1008388354, now seen corresponding path program 2 times [2021-10-07 16:16:26,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:26,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447329489] [2021-10-07 16:16:26,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:16:26,124 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:26,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:26,126 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:16:26,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-07 16:16:26,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:16:26,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:26,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:16:26,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:26,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:26,662 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:26,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:16:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:27,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:28,697 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:28,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447329489] [2021-10-07 16:16:28,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447329489] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:28,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:28,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-07 16:16:28,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95707526] [2021-10-07 16:16:28,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:16:28,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:28,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:16:28,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:16:28,699 INFO L87 Difference]: Start difference. First operand 2714 states and 11550 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:36,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:36,498 INFO L93 Difference]: Finished difference Result 4687 states and 19987 transitions. [2021-10-07 16:16:36,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 16:16:36,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 [2021-10-07 16:16:36,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:36,517 INFO L225 Difference]: With dead ends: 4687 [2021-10-07 16:16:36,517 INFO L226 Difference]: Without dead ends: 4687 [2021-10-07 16:16:36,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 5269.3ms TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-10-07 16:16:36,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2021-10-07 16:16:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 3609. [2021-10-07 16:16:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3600 states have (on average 4.448611111111111) internal successors, (16015), 3608 states have internal predecessors, (16015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 16015 transitions. [2021-10-07 16:16:36,675 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 16015 transitions. Word has length 12 [2021-10-07 16:16:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:36,675 INFO L470 AbstractCegarLoop]: Abstraction has 3609 states and 16015 transitions. [2021-10-07 16:16:36,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 16015 transitions. [2021-10-07 16:16:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:16:36,678 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:36,678 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:16:36,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-07 16:16:36,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:16:36,892 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1967670086, now seen corresponding path program 2 times [2021-10-07 16:16:36,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:36,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870005827] [2021-10-07 16:16:36,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:16:36,894 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:36,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:36,895 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:16:36,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-07 16:16:37,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:16:37,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:37,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-07 16:16:37,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:37,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:37,519 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:37,519 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:16:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:38,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:39,490 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:39,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870005827] [2021-10-07 16:16:39,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870005827] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:39,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:39,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-07 16:16:39,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704980447] [2021-10-07 16:16:39,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:16:39,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:39,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:16:39,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:16:39,493 INFO L87 Difference]: Start difference. First operand 3609 states and 16015 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:53,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:53,418 INFO L93 Difference]: Finished difference Result 4989 states and 20926 transitions. [2021-10-07 16:16:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 16:16:53,420 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 [2021-10-07 16:16:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:53,436 INFO L225 Difference]: With dead ends: 4989 [2021-10-07 16:16:53,436 INFO L226 Difference]: Without dead ends: 4989 [2021-10-07 16:16:53,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 6217.5ms TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2021-10-07 16:16:53,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4989 states. [2021-10-07 16:16:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4989 to 3673. [2021-10-07 16:16:53,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 3664 states have (on average 4.487445414847161) internal successors, (16442), 3672 states have internal predecessors, (16442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:53,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 16442 transitions. [2021-10-07 16:16:53,617 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 16442 transitions. Word has length 12 [2021-10-07 16:16:53,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:53,618 INFO L470 AbstractCegarLoop]: Abstraction has 3673 states and 16442 transitions. [2021-10-07 16:16:53,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:53,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 16442 transitions. [2021-10-07 16:16:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:16:53,620 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:53,621 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2021-10-07 16:16:53,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-07 16:16:53,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:16:53,835 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:53,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:53,836 INFO L82 PathProgramCache]: Analyzing trace with hash -581246862, now seen corresponding path program 4 times [2021-10-07 16:16:53,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:53,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619567752] [2021-10-07 16:16:53,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:16:53,837 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:53,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:53,838 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:16:53,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-07 16:16:54,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:16:54,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:54,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:16:54,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:54,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:54,382 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:54,383 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:16:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:54,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:57,017 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:57,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619567752] [2021-10-07 16:16:57,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619567752] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:57,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:57,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-07 16:16:57,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166357270] [2021-10-07 16:16:57,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 16:16:57,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:57,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 16:16:57,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:16:57,019 INFO L87 Difference]: Start difference. First operand 3673 states and 16442 transitions. Second operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:22,370 INFO L93 Difference]: Finished difference Result 6327 states and 26761 transitions. [2021-10-07 16:17:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-07 16:17:22,373 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 16:17:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:22,396 INFO L225 Difference]: With dead ends: 6327 [2021-10-07 16:17:22,396 INFO L226 Difference]: Without dead ends: 6327 [2021-10-07 16:17:22,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 12260.2ms TimeCoverageRelationStatistics Valid=528, Invalid=2334, Unknown=0, NotChecked=0, Total=2862 [2021-10-07 16:17:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6327 states. [2021-10-07 16:17:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6327 to 3764. [2021-10-07 16:17:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3755 states have (on average 4.384287616511318) internal successors, (16463), 3763 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 16463 transitions. [2021-10-07 16:17:22,623 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 16463 transitions. Word has length 13 [2021-10-07 16:17:22,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:22,624 INFO L470 AbstractCegarLoop]: Abstraction has 3764 states and 16463 transitions. [2021-10-07 16:17:22,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 16463 transitions. [2021-10-07 16:17:22,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:17:22,633 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:22,633 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:22,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-07 16:17:22,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:17:22,834 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:17:22,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:22,834 INFO L82 PathProgramCache]: Analyzing trace with hash 503971569, now seen corresponding path program 2 times [2021-10-07 16:17:22,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:22,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741332890] [2021-10-07 16:17:22,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:17:22,835 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:22,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:22,836 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:17:22,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-07 16:17:23,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 16:17:23,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:23,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:17:23,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:23,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:17:23,380 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:17:23,380 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:17:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:17:23,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:17:24,740 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:24,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741332890] [2021-10-07 16:17:24,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741332890] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:17:24,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:17:24,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:17:24,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55585820] [2021-10-07 16:17:24,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:17:24,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:24,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:17:24,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:17:24,742 INFO L87 Difference]: Start difference. First operand 3764 states and 16463 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:25,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:25,354 INFO L93 Difference]: Finished difference Result 4358 states and 18668 transitions. [2021-10-07 16:17:25,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 16:17:25,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 16:17:25,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:25,375 INFO L225 Difference]: With dead ends: 4358 [2021-10-07 16:17:25,375 INFO L226 Difference]: Without dead ends: 4358 [2021-10-07 16:17:25,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:17:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2021-10-07 16:17:25,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 2901. [2021-10-07 16:17:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 2892 states have (on average 4.200553250345782) internal successors, (12148), 2900 states have internal predecessors, (12148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 12148 transitions. [2021-10-07 16:17:25,505 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 12148 transitions. Word has length 13 [2021-10-07 16:17:25,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:25,505 INFO L470 AbstractCegarLoop]: Abstraction has 2901 states and 12148 transitions. [2021-10-07 16:17:25,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 12148 transitions. [2021-10-07 16:17:25,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 16:17:25,508 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:25,508 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1] [2021-10-07 16:17:25,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-07 16:17:25,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:17:25,725 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:17:25,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:25,725 INFO L82 PathProgramCache]: Analyzing trace with hash -810101177, now seen corresponding path program 5 times [2021-10-07 16:17:25,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:25,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416432571] [2021-10-07 16:17:25,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:17:25,726 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:25,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:25,728 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:17:25,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-07 16:17:26,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 16:17:26,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:26,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:17:26,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:26,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:17:26,368 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:17:26,368 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:17:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:17:26,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:27,387 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 9 treesize of output 7 [2021-10-07 16:17:27,424 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:17:27,430 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:17:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:17:30,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:30,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416432571] [2021-10-07 16:17:30,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416432571] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:30,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:30,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2021-10-07 16:17:30,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540550858] [2021-10-07 16:17:30,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-07 16:17:30,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:30,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-07 16:17:30,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-10-07 16:17:30,423 INFO L87 Difference]: Start difference. First operand 2901 states and 12148 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:36,801 INFO L93 Difference]: Finished difference Result 4199 states and 16727 transitions. [2021-10-07 16:17:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 16:17:36,803 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 16:17:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:36,817 INFO L225 Difference]: With dead ends: 4199 [2021-10-07 16:17:36,817 INFO L226 Difference]: Without dead ends: 4199 [2021-10-07 16:17:36,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 5080.5ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 16:17:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2021-10-07 16:17:36,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 3039. [2021-10-07 16:17:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3039 states, 3030 states have (on average 4.238283828382838) internal successors, (12842), 3038 states have internal predecessors, (12842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 12842 transitions. [2021-10-07 16:17:36,930 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 12842 transitions. Word has length 14 [2021-10-07 16:17:36,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:36,930 INFO L470 AbstractCegarLoop]: Abstraction has 3039 states and 12842 transitions. [2021-10-07 16:17:36,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:36,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 12842 transitions. [2021-10-07 16:17:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 16:17:36,933 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:36,933 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:36,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-07 16:17:37,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:17:37,146 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:17:37,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:37,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1592269402, now seen corresponding path program 3 times [2021-10-07 16:17:37,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:37,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639564728] [2021-10-07 16:17:37,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:17:37,148 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:37,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:37,150 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:17:37,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-07 16:17:37,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:17:37,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:37,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 16:17:37,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:37,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:17:37,886 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:17:37,887 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:17:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:17:38,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:17:40,602 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:40,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639564728] [2021-10-07 16:17:40,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639564728] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:40,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:40,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:17:40,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254557687] [2021-10-07 16:17:40,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:17:40,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:40,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:17:40,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:17:40,605 INFO L87 Difference]: Start difference. First operand 3039 states and 12842 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:41,905 INFO L93 Difference]: Finished difference Result 3187 states and 13157 transitions. [2021-10-07 16:17:41,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:17:41,906 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 14 [2021-10-07 16:17:41,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:41,916 INFO L225 Difference]: With dead ends: 3187 [2021-10-07 16:17:41,916 INFO L226 Difference]: Without dead ends: 3187 [2021-10-07 16:17:41,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1231.7ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:17:41,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-10-07 16:17:41,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 2077. [2021-10-07 16:17:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 2072 states have (on average 4.056467181467181) internal successors, (8405), 2076 states have internal predecessors, (8405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 8405 transitions. [2021-10-07 16:17:41,980 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 8405 transitions. Word has length 14 [2021-10-07 16:17:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:41,981 INFO L470 AbstractCegarLoop]: Abstraction has 2077 states and 8405 transitions. [2021-10-07 16:17:41,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 8405 transitions. [2021-10-07 16:17:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 16:17:41,984 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:41,984 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:41,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-07 16:17:42,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:17:42,197 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:17:42,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:42,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1265232291, now seen corresponding path program 3 times [2021-10-07 16:17:42,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:42,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837839840] [2021-10-07 16:17:42,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:17:42,199 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:42,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:42,200 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:17:42,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-07 16:17:42,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 16:17:42,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:42,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 16:17:42,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:42,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:17:42,963 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:17:42,964 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:17:43,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-07 16:17:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:17:43,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:17:43,760 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:43,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837839840] [2021-10-07 16:17:43,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837839840] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:43,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:43,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 16:17:43,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516634821] [2021-10-07 16:17:43,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:17:43,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:43,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:17:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:17:43,762 INFO L87 Difference]: Start difference. First operand 2077 states and 8405 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2021-10-07 16:17:46,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:46,463 INFO L93 Difference]: Finished difference Result 2223 states and 8663 transitions. [2021-10-07 16:17:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 16:17:46,466 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 14 [2021-10-07 16:17:46,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:46,473 INFO L225 Difference]: With dead ends: 2223 [2021-10-07 16:17:46,473 INFO L226 Difference]: Without dead ends: 2223 [2021-10-07 16:17:46,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1374.0ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-10-07 16:17:46,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-10-07 16:17:46,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 2091. [2021-10-07 16:17:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2091 states, 2086 states have (on average 4.017737296260786) internal successors, (8381), 2090 states have internal predecessors, (8381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 8381 transitions. [2021-10-07 16:17:46,537 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 8381 transitions. Word has length 14 [2021-10-07 16:17:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:46,537 INFO L470 AbstractCegarLoop]: Abstraction has 2091 states and 8381 transitions. [2021-10-07 16:17:46,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2021-10-07 16:17:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 8381 transitions. [2021-10-07 16:17:46,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 16:17:46,540 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:46,541 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:46,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-07 16:17:46,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:17:46,754 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:17:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:46,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1938278139, now seen corresponding path program 4 times [2021-10-07 16:17:46,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:46,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195613147] [2021-10-07 16:17:46,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:17:46,756 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:46,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:46,758 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:17:46,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-07 16:17:47,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:17:47,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:47,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 16:17:47,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:47,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:17:47,377 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:17:47,377 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:17:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:17:48,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:17:50,630 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:50,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195613147] [2021-10-07 16:17:50,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195613147] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:50,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:50,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-07 16:17:50,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143359136] [2021-10-07 16:17:50,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 16:17:50,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 16:17:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:17:50,632 INFO L87 Difference]: Start difference. First operand 2091 states and 8381 transitions. Second operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:14,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:14,012 INFO L93 Difference]: Finished difference Result 4349 states and 16239 transitions. [2021-10-07 16:18:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 16:18:14,014 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 16:18:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:14,031 INFO L225 Difference]: With dead ends: 4349 [2021-10-07 16:18:14,031 INFO L226 Difference]: Without dead ends: 4349 [2021-10-07 16:18:14,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 13060.2ms TimeCoverageRelationStatistics Valid=520, Invalid=2236, Unknown=0, NotChecked=0, Total=2756 [2021-10-07 16:18:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2021-10-07 16:18:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 2961. [2021-10-07 16:18:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2956 states have (on average 4.25) internal successors, (12563), 2960 states have internal predecessors, (12563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:14,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 12563 transitions. [2021-10-07 16:18:14,140 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 12563 transitions. Word has length 15 [2021-10-07 16:18:14,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:14,141 INFO L470 AbstractCegarLoop]: Abstraction has 2961 states and 12563 transitions. [2021-10-07 16:18:14,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:14,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 12563 transitions. [2021-10-07 16:18:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 16:18:14,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:14,145 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:18:14,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:14,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:14,361 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:18:14,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:14,361 INFO L82 PathProgramCache]: Analyzing trace with hash -687481528, now seen corresponding path program 5 times [2021-10-07 16:18:14,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:14,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080153849] [2021-10-07 16:18:14,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:18:14,363 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:14,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:14,364 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:14,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-07 16:18:14,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 16:18:14,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:14,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-07 16:18:14,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:14,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:18:15,082 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:18:15,082 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:18:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:18:15,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:15,920 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 9 treesize of output 7 [2021-10-07 16:18:15,964 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:18:15,968 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:18:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:18:18,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:18,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080153849] [2021-10-07 16:18:18,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080153849] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:18,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:18,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2021-10-07 16:18:18,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513413837] [2021-10-07 16:18:18,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 16:18:18,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:18,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 16:18:18,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:18:18,588 INFO L87 Difference]: Start difference. First operand 2961 states and 12563 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:24,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:24,240 INFO L93 Difference]: Finished difference Result 3583 states and 13903 transitions. [2021-10-07 16:18:24,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 16:18:24,242 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 16:18:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:24,255 INFO L225 Difference]: With dead ends: 3583 [2021-10-07 16:18:24,255 INFO L226 Difference]: Without dead ends: 3583 [2021-10-07 16:18:24,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 4112.0ms TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 16:18:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2021-10-07 16:18:24,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 2807. [2021-10-07 16:18:24,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2802 states have (on average 4.210920770877944) internal successors, (11799), 2806 states have internal predecessors, (11799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:24,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 11799 transitions. [2021-10-07 16:18:24,346 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 11799 transitions. Word has length 15 [2021-10-07 16:18:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:24,346 INFO L470 AbstractCegarLoop]: Abstraction has 2807 states and 11799 transitions. [2021-10-07 16:18:24,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 11799 transitions. [2021-10-07 16:18:24,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 16:18:24,349 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:24,350 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-07 16:18:24,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:24,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:24,565 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:18:24,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:24,566 INFO L82 PathProgramCache]: Analyzing trace with hash 897916751, now seen corresponding path program 3 times [2021-10-07 16:18:24,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:24,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931915707] [2021-10-07 16:18:24,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:18:24,567 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:24,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:24,569 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:24,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-07 16:18:25,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-07 16:18:25,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:25,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:18:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:25,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:18:25,572 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:18:25,572 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:18:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:18:26,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:18:31,697 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:31,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931915707] [2021-10-07 16:18:31,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931915707] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:31,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:31,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 16:18:31,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733813845] [2021-10-07 16:18:31,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 16:18:31,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:31,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 16:18:31,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:18:31,700 INFO L87 Difference]: Start difference. First operand 2807 states and 11799 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:18:43,560 WARN L207 SmtUtils]: Spent 8.96 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-07 16:18:52,267 WARN L207 SmtUtils]: Spent 7.79 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-07 16:19:30,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:30,102 INFO L93 Difference]: Finished difference Result 55766 states and 247472 transitions. [2021-10-07 16:19:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 16:19:30,104 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 16:19:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:30,765 INFO L225 Difference]: With dead ends: 55766 [2021-10-07 16:19:30,765 INFO L226 Difference]: Without dead ends: 55766 [2021-10-07 16:19:30,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 51384.4ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 16:19:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55766 states. [2021-10-07 16:19:32,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55766 to 2823. [2021-10-07 16:19:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2818 states have (on average 4.198367636621717) internal successors, (11831), 2822 states have internal predecessors, (11831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 11831 transitions. [2021-10-07 16:19:32,028 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 11831 transitions. Word has length 16 [2021-10-07 16:19:32,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:32,028 INFO L470 AbstractCegarLoop]: Abstraction has 2823 states and 11831 transitions. [2021-10-07 16:19:32,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:32,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 11831 transitions. [2021-10-07 16:19:32,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 16:19:32,033 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:32,033 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1] [2021-10-07 16:19:32,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:32,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:32,245 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:19:32,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:32,246 INFO L82 PathProgramCache]: Analyzing trace with hash 504727218, now seen corresponding path program 6 times [2021-10-07 16:19:32,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:32,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588694804] [2021-10-07 16:19:32,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:19:32,248 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:32,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:32,249 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:32,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-07 16:19:33,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-07 16:19:33,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:33,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-07 16:19:33,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:33,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:33,335 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:33,335 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:34,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:34,699 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 9 treesize of output 7 [2021-10-07 16:19:34,748 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:19:34,752 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:19:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:41,664 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:41,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588694804] [2021-10-07 16:19:41,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588694804] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:41,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:41,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 33 [2021-10-07 16:19:41,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619127138] [2021-10-07 16:19:41,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-07 16:19:41,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:41,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-07 16:19:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 16:19:41,666 INFO L87 Difference]: Start difference. First operand 2823 states and 11831 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:15,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:15,282 INFO L93 Difference]: Finished difference Result 8749 states and 34613 transitions. [2021-10-07 16:20:15,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-07 16:20:15,284 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-07 16:20:15,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:15,313 INFO L225 Difference]: With dead ends: 8749 [2021-10-07 16:20:15,314 INFO L226 Difference]: Without dead ends: 8749 [2021-10-07 16:20:15,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 21349.8ms TimeCoverageRelationStatistics Valid=943, Invalid=4027, Unknown=0, NotChecked=0, Total=4970 [2021-10-07 16:20:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8749 states. [2021-10-07 16:20:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8749 to 4517. [2021-10-07 16:20:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4512 states have (on average 4.190602836879433) internal successors, (18908), 4516 states have internal predecessors, (18908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 18908 transitions. [2021-10-07 16:20:15,602 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 18908 transitions. Word has length 19 [2021-10-07 16:20:15,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:15,603 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 18908 transitions. [2021-10-07 16:20:15,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 18908 transitions. [2021-10-07 16:20:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 16:20:15,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:15,609 INFO L512 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1] [2021-10-07 16:20:15,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:15,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:15,810 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:20:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:15,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1728640317, now seen corresponding path program 7 times [2021-10-07 16:20:15,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:15,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016556072] [2021-10-07 16:20:15,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:20:15,813 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:15,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:15,814 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:15,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-07 16:20:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:20:16,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-07 16:20:16,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:16,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:16,498 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:20:16,498 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 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:20:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:20:17,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:23,281 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:23,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016556072] [2021-10-07 16:20:23,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016556072] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:20:23,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:20:23,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 36 [2021-10-07 16:20:23,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188742429] [2021-10-07 16:20:23,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 16:20:23,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:23,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 16:20:23,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1083, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 16:20:23,284 INFO L87 Difference]: Start difference. First operand 4517 states and 18908 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:21:15,510 INFO L93 Difference]: Finished difference Result 10542 states and 41812 transitions. [2021-10-07 16:21:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-07 16:21:15,514 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 16:21:15,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:21:15,555 INFO L225 Difference]: With dead ends: 10542 [2021-10-07 16:21:15,555 INFO L226 Difference]: Without dead ends: 10542 [2021-10-07 16:21:15,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2183 ImplicationChecksByTransitivity, 27704.7ms TimeCoverageRelationStatistics Valid=1733, Invalid=7579, Unknown=0, NotChecked=0, Total=9312 [2021-10-07 16:21:15,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10542 states. [2021-10-07 16:21:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10542 to 5492. [2021-10-07 16:21:15,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5492 states, 5487 states have (on average 4.227264443229451) internal successors, (23195), 5491 states have internal predecessors, (23195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:15,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 23195 transitions. [2021-10-07 16:21:15,742 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 23195 transitions. Word has length 21 [2021-10-07 16:21:15,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:21:15,743 INFO L470 AbstractCegarLoop]: Abstraction has 5492 states and 23195 transitions. [2021-10-07 16:21:15,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:15,743 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 23195 transitions. [2021-10-07 16:21:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 16:21:15,751 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:21:15,752 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:21:15,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-07 16:21:15,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:21:15,966 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:21:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:21:15,967 INFO L82 PathProgramCache]: Analyzing trace with hash 50396677, now seen corresponding path program 6 times [2021-10-07 16:21:15,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:21:15,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125097795] [2021-10-07 16:21:15,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:21:15,968 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:21:15,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:21:15,969 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:21:15,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-07 16:21:16,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-07 16:21:16,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:21:16,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-07 16:21:16,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:21:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:21:17,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:21:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:21:18,651 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:21:18,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125097795] [2021-10-07 16:21:18,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125097795] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:21:18,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:21:18,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2021-10-07 16:21:18,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953790579] [2021-10-07 16:21:18,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 16:21:18,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:21:18,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 16:21:18,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:21:18,653 INFO L87 Difference]: Start difference. First operand 5492 states and 23195 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:21:34,740 INFO L93 Difference]: Finished difference Result 9373 states and 34769 transitions. [2021-10-07 16:21:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-07 16:21:34,742 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 16:21:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:21:34,770 INFO L225 Difference]: With dead ends: 9373 [2021-10-07 16:21:34,770 INFO L226 Difference]: Without dead ends: 9373 [2021-10-07 16:21:34,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 10291.6ms TimeCoverageRelationStatistics Valid=1426, Invalid=4426, Unknown=0, NotChecked=0, Total=5852 [2021-10-07 16:21:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9373 states. [2021-10-07 16:21:34,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9373 to 6007. [2021-10-07 16:21:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6007 states, 6002 states have (on average 4.273408863712096) internal successors, (25649), 6006 states have internal predecessors, (25649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6007 states to 6007 states and 25649 transitions. [2021-10-07 16:21:34,943 INFO L78 Accepts]: Start accepts. Automaton has 6007 states and 25649 transitions. Word has length 21 [2021-10-07 16:21:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:21:34,943 INFO L470 AbstractCegarLoop]: Abstraction has 6007 states and 25649 transitions. [2021-10-07 16:21:34,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 6007 states and 25649 transitions. [2021-10-07 16:21:34,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:21:34,953 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:21:34,953 INFO L512 BasicCegarLoop]: trace histogram [12, 6, 1, 1, 1, 1, 1] [2021-10-07 16:21:34,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-07 16:21:35,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:21:35,168 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:21:35,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:21:35,168 INFO L82 PathProgramCache]: Analyzing trace with hash -771356142, now seen corresponding path program 8 times [2021-10-07 16:21:35,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:21:35,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445340366] [2021-10-07 16:21:35,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:21:35,170 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:21:35,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:21:35,171 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:21:35,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-07 16:21:35,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:21:35,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:21:35,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-07 16:21:35,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:21:35,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:35,936 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:21:35,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:21:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:21:37,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:21:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:21:44,095 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:21:44,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445340366] [2021-10-07 16:21:44,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445340366] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:21:44,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:21:44,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2021-10-07 16:21:44,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652668160] [2021-10-07 16:21:44,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-07 16:21:44,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:21:44,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-07 16:21:44,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1464, Unknown=0, NotChecked=0, Total=1892 [2021-10-07 16:21:44,097 INFO L87 Difference]: Start difference. First operand 6007 states and 25649 transitions. Second operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:22:51,194 INFO L93 Difference]: Finished difference Result 16405 states and 66055 transitions. [2021-10-07 16:22:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-07 16:22:51,198 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 16:22:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:22:51,253 INFO L225 Difference]: With dead ends: 16405 [2021-10-07 16:22:51,253 INFO L226 Difference]: Without dead ends: 16405 [2021-10-07 16:22:51,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3110 ImplicationChecksByTransitivity, 32941.3ms TimeCoverageRelationStatistics Valid=2912, Invalid=8008, Unknown=0, NotChecked=0, Total=10920 [2021-10-07 16:22:51,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16405 states. [2021-10-07 16:22:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16405 to 9355. [2021-10-07 16:22:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9355 states, 9350 states have (on average 4.486951871657754) internal successors, (41953), 9354 states have internal predecessors, (41953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9355 states to 9355 states and 41953 transitions. [2021-10-07 16:22:51,539 INFO L78 Accepts]: Start accepts. Automaton has 9355 states and 41953 transitions. Word has length 23 [2021-10-07 16:22:51,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:22:51,539 INFO L470 AbstractCegarLoop]: Abstraction has 9355 states and 41953 transitions. [2021-10-07 16:22:51,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:51,539 INFO L276 IsEmpty]: Start isEmpty. Operand 9355 states and 41953 transitions. [2021-10-07 16:22:51,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:22:51,548 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:22:51,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:22:51,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-07 16:22:51,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:22:51,755 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:22:51,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:22:51,755 INFO L82 PathProgramCache]: Analyzing trace with hash 449017612, now seen corresponding path program 1 times [2021-10-07 16:22:51,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:22:51,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684037184] [2021-10-07 16:22:51,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:22:51,757 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:22:51,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:22:51,758 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:22:51,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-07 16:22:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:22:52,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-07 16:22:52,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:22:52,346 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 157 treesize of output 149 [2021-10-07 16:22:52,669 INFO L354 Elim1Store]: treesize reduction 163, result has 15.1 percent of original size [2021-10-07 16:22:52,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 35 treesize of output 43 [2021-10-07 16:23:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:02,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:02,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:02,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:02,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:02,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:02,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:23:02,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:02,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:23:02,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:23:02,720 INFO L354 Elim1Store]: treesize reduction 916, result has 17.7 percent of original size [2021-10-07 16:23:02,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 30 case distinctions, treesize of input 203 treesize of output 319 [2021-10-07 16:23:16,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:16,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:16,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:16,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:23:16,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:16,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:16,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:23:16,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:16,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:23:16,377 INFO L354 Elim1Store]: treesize reduction 158, result has 33.3 percent of original size [2021-10-07 16:23:16,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 197 treesize of output 201 [2021-10-07 16:24:30,242 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 384 treesize of output 376 [2021-10-07 16:24:30,570 INFO L354 Elim1Store]: treesize reduction 822, result has 5.2 percent of original size [2021-10-07 16:24:30,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 6 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 376 treesize of output 250 [2021-10-07 16:24:30,580 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 226 treesize of output 218 [2021-10-07 16:24:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:24:31,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:24:48,462 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:24:48,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684037184] [2021-10-07 16:24:48,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-07 16:24:48,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1799417018] [2021-10-07 16:24:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:24:48,463 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-07 16:24:48,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-07 16:24:48,465 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-07 16:24:48,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-10-07 16:24:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:24:49,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-07 16:24:49,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:24:50,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:24:50,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:24:50,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:24:50,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:24:50,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:24:50,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:24:50,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2021-10-07 16:24:52,602 INFO L354 Elim1Store]: treesize reduction 68, result has 29.9 percent of original size [2021-10-07 16:24:52,603 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 10 case distinctions, treesize of input 69 treesize of output 89 [2021-10-07 16:25:03,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:25:03,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:25:03,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:25:03,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:25:03,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:25:03,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:25:03,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:25:03,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:25:03,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:25:03,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:25:03,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:25:04,889 INFO L354 Elim1Store]: treesize reduction 1479, result has 12.9 percent of original size [2021-10-07 16:25:04,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 205 treesize of output 321 Received shutdown request... [2021-10-07 16:28:15,753 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-10-07 16:28:15,755 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:28:15,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-10-07 16:28:15,777 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:28:15,777 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:28:15,778 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:28:15,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:16,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:28:16,157 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. [2021-10-07 16:28:16,160 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:28:16,160 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:28:16,160 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-07 16:28:16,160 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-07 16:28:16,160 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:28:16,160 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:28:16,161 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:28:16,161 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:28:16,161 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:28:16,161 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:28:16,161 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-07 16:28:16,161 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-07 16:28:16,161 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 16:28:16,161 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 16:28:16,161 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 16:28:16,161 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 16:28:16,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 16:28:16,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 16:28:16,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 16:28:16,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 16:28:16,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-07 16:28:16,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-07 16:28:16,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-07 16:28:16,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-07 16:28:16,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-07 16:28:16,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-07 16:28:16,163 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:28:16,163 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 16:28:16,163 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 16:28:16,163 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-07 16:28:16,163 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:28:16,163 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:28:16,163 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-07 16:28:16,163 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-07 16:28:16,163 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:28:16,163 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:28:16,164 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:28:16,164 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:28:16,164 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:28:16,164 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:28:16,164 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-07 16:28:16,164 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-07 16:28:16,170 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 16:28:16,170 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 16:28:16,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 04:28:16 BasicIcfg [2021-10-07 16:28:16,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 16:28:16,174 INFO L168 Benchmark]: Toolchain (without parser) took 827489.21 ms. Allocated memory was 151.0 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 125.5 MB in the beginning and 702.5 MB in the end (delta: -577.0 MB). Peak memory consumption was 938.4 MB. Max. memory is 8.0 GB. [2021-10-07 16:28:16,174 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 122.4 MB in the beginning and 122.3 MB in the end (delta: 80.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 16:28:16,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 425.87 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 111.7 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:28:16,175 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.70 ms. Allocated memory is still 151.0 MB. Free memory was 111.7 MB in the beginning and 109.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-07 16:28:16,175 INFO L168 Benchmark]: Boogie Preprocessor took 42.74 ms. Allocated memory is still 151.0 MB. Free memory was 109.9 MB in the beginning and 108.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:28:16,175 INFO L168 Benchmark]: RCFGBuilder took 1303.51 ms. Allocated memory is still 151.0 MB. Free memory was 108.1 MB in the beginning and 110.0 MB in the end (delta: -1.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. [2021-10-07 16:28:16,176 INFO L168 Benchmark]: TraceAbstraction took 825611.57 ms. Allocated memory was 151.0 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 109.5 MB in the beginning and 702.5 MB in the end (delta: -593.0 MB). Peak memory consumption was 922.2 MB. Max. memory is 8.0 GB. [2021-10-07 16:28:16,180 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 122.4 MB in the beginning and 122.3 MB in the end (delta: 80.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 425.87 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 111.7 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 91.70 ms. Allocated memory is still 151.0 MB. Free memory was 111.7 MB in the beginning and 109.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.74 ms. Allocated memory is still 151.0 MB. Free memory was 109.9 MB in the beginning and 108.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1303.51 ms. Allocated memory is still 151.0 MB. Free memory was 108.1 MB in the beginning and 110.0 MB in the end (delta: -1.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 825611.57 ms. Allocated memory was 151.0 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 109.5 MB in the beginning and 702.5 MB in the end (delta: -593.0 MB). Peak memory consumption was 922.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 26862.2ms, 169 PlacesBefore, 61 PlacesAfterwards, 172 TransitionsBefore, 55 TransitionsAfterwards, 2688 CoEnabledTransitionPairs, 7 FixpointIterations, 92 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 6 ConcurrentYvCompositions, 9 ChoiceCompositions, 181 TotalNumberOfCompositions, 3569 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3306, positive: 3275, positive conditional: 0, positive unconditional: 3275, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1349, positive: 1340, positive conditional: 0, positive unconditional: 1340, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1349, positive: 1340, positive conditional: 0, positive unconditional: 1340, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 9, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 744, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 744, negative conditional: 0, negative unconditional: 744, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3306, positive: 1935, positive conditional: 0, positive unconditional: 1935, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 1349, unknown conditional: 0, unknown unconditional: 1349] , Statistics on independence cache: Total cache size (in pairs): 150, Positive cache size: 148, Positive conditional cache size: 0, Positive unconditional cache size: 148, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 111]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 111]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 5ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 202 locations, 43 error locations. Started 1 CEGAR loops. OverallTime: 825426.6ms, OverallIterations: 35, TraceHistogramMax: 14, EmptinessCheckTime: 93.2ms, AutomataDifference: 357938.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27030.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2277 SDtfs, 27469 SDslu, 27511 SDs, 0 SdLazy, 36905 SolverSat, 1481 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 169368.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1046 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 859 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9757 ImplicationChecksByTransitivity, 217272.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9355occurred in iteration=34, InterpolantAutomatonStates: 616, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4289.9ms AutomataMinimizationTime, 34 MinimizatonAttempts, 97891 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 317.8ms SsaConstructionTime, 4228.8ms SatisfiabilityAnalysisTime, 95056.9ms InterpolantComputationTime, 349 NumberOfCodeBlocks, 343 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 630 ConstructedInterpolants, 119 QuantifiedInterpolants, 14616 SizeOfPredicates, 406 NumberOfNonLiveVariables, 2762 ConjunctsInSsa, 558 ConjunctsInUnsatCore, 68 InterpolantComputations, 17 PerfectInterpolantSequences, 199/1248 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown